/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:46:26,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:46:26,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:46:26,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:46:26,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:46:26,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:46:26,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:46:26,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:46:26,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:46:26,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:46:26,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:46:26,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:46:26,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:46:26,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:46:26,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:46:26,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:46:26,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:46:26,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:46:26,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:46:26,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:46:26,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:46:26,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:46:26,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:46:26,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:46:26,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:46:26,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:46:26,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:46:26,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:46:26,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:46:26,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:46:26,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:46:26,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:46:26,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:46:26,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:46:26,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:46:26,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:46:26,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:46:26,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:46:26,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:46:26,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:46:26,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:46:26,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-04-17 18:46:26,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:46:26,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:46:26,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:46:26,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:46:26,525 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:46:26,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:46:26,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:46:26,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:46:26,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:46:26,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:46:26,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:46:26,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:46:26,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:46:26,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:46:26,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:46:26,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:46:26,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:46:26,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:46:26,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:46:26,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:46:26,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:46:26,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:46:26,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:46:26,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:46:26,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:46:26,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:46:26,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:46:26,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:46:26,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:46:26,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:46:26,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:46:26,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:46:26,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:46:26,824 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:46:26,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-04-17 18:46:26,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34c680bf1/7f916362fb694d42ad50d4dc8d747c02/FLAG663fdf9e8 [2020-04-17 18:46:27,457 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:46:27,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-04-17 18:46:27,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34c680bf1/7f916362fb694d42ad50d4dc8d747c02/FLAG663fdf9e8 [2020-04-17 18:46:27,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34c680bf1/7f916362fb694d42ad50d4dc8d747c02 [2020-04-17 18:46:27,758 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:46:27,776 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:46:27,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:46:27,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:46:27,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:46:27,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:27" (1/1) ... [2020-04-17 18:46:27,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2407fc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:27, skipping insertion in model container [2020-04-17 18:46:27,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:27" (1/1) ... [2020-04-17 18:46:27,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:46:27,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:46:28,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:46:28,326 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:46:28,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:46:28,481 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:46:28,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28 WrapperNode [2020-04-17 18:46:28,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:46:28,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:46:28,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:46:28,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:46:28,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:46:28,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:46:28,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:46:28,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:46:28,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... [2020-04-17 18:46:28,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:46:28,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:46:28,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:46:28,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:46:28,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:46:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:46:28,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:46:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:46:28,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:46:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:46:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:46:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:46:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:46:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:46:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:46:28,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:46:28,648 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:46:29,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:46:29,045 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:46:29,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:29 BoogieIcfgContainer [2020-04-17 18:46:29,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:46:29,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:46:29,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:46:29,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:46:29,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:46:27" (1/3) ... [2020-04-17 18:46:29,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e6f5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:29, skipping insertion in model container [2020-04-17 18:46:29,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28" (2/3) ... [2020-04-17 18:46:29,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e6f5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:29, skipping insertion in model container [2020-04-17 18:46:29,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:29" (3/3) ... [2020-04-17 18:46:29,056 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-04-17 18:46:29,065 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:46:29,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:46:29,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:46:29,077 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:46:29,103 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,103 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,103 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,104 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,104 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,105 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,105 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,105 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,105 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,106 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,106 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,106 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,107 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,107 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,107 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,108 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,108 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,108 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,108 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,109 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,109 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,109 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,110 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,110 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,110 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,110 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,111 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,111 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,115 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,115 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,115 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,116 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,116 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,116 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,126 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,128 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,129 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,129 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,129 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,130 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:29,149 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:46:29,170 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:46:29,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:46:29,171 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:46:29,171 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:46:29,171 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:46:29,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:46:29,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:46:29,172 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:46:29,187 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:29,189 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:29,230 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 18:46:29,230 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:46:29,236 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 18:46:29,239 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:29,256 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 18:46:29,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:46:29,257 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 18:46:29,259 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 18:46:29,261 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:46:30,457 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 18:46:30,736 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 18:46:30,736 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 18:46:30,740 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 18:46:30,752 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:46:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:46:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:46:30,761 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:30,762 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,762 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 18:46:30,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168409779] [2020-04-17 18:46:30,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168409779] [2020-04-17 18:46:31,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:31,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:46:31,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312562020] [2020-04-17 18:46:31,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:46:31,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:46:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:46:31,152 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:46:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,256 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 18:46:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:46:31,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:46:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,278 INFO L225 Difference]: With dead ends: 75 [2020-04-17 18:46:31,279 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 18:46:31,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:46:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 18:46:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 18:46:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 18:46:31,329 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 18:46:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,330 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 18:46:31,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:46:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 18:46:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:46:31,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,336 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 18:46:31,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079521361] [2020-04-17 18:46:31,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079521361] [2020-04-17 18:46:31,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:31,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:46:31,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896333125] [2020-04-17 18:46:31,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:46:31,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:46:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:46:31,470 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 18:46:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,510 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 18:46:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:46:31,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:46:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,512 INFO L225 Difference]: With dead ends: 56 [2020-04-17 18:46:31,512 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 18:46:31,513 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 18:46:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 18:46:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 18:46:31,520 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 18:46:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,521 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 18:46:31,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:46:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 18:46:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:31,522 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,522 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 18:46:31,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308597648] [2020-04-17 18:46:31,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308597648] [2020-04-17 18:46:31,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:31,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:31,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527198566] [2020-04-17 18:46:31,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:31,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:31,608 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 18:46:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,713 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 18:46:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:31,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,718 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:31,718 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:31,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 18:46:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:31,728 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 18:46:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,728 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:31,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:31,729 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,730 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 18:46:31,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886386103] [2020-04-17 18:46:31,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886386103] [2020-04-17 18:46:31,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:31,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:31,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590741366] [2020-04-17 18:46:31,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:31,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:31,829 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 18:46:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,933 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 18:46:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:46:31,935 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,936 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:31,937 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 18:46:31,937 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 18:46:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 18:46:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 18:46:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 18:46:31,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 18:46:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,949 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 18:46:31,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 18:46:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:31,950 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,951 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,951 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 18:46:31,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341029338] [2020-04-17 18:46:31,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341029338] [2020-04-17 18:46:32,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:32,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:32,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500545523] [2020-04-17 18:46:32,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:32,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:32,059 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 18:46:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,141 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 18:46:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:46:32,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,142 INFO L225 Difference]: With dead ends: 57 [2020-04-17 18:46:32,142 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 18:46:32,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 18:46:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 18:46:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:46:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 18:46:32,153 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 18:46:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,153 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 18:46:32,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 18:46:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:32,154 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,154 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,155 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 18:46:32,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382078895] [2020-04-17 18:46:32,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382078895] [2020-04-17 18:46:32,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655290044] [2020-04-17 18:46:32,257 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,319 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:32,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:32,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:32,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943170588] [2020-04-17 18:46:32,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:32,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:32,384 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 18:46:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,522 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 18:46:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:32,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,523 INFO L225 Difference]: With dead ends: 48 [2020-04-17 18:46:32,523 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 18:46:32,524 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 18:46:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 18:46:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 18:46:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 18:46:32,529 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 18:46:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,530 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 18:46:32,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 18:46:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:32,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,531 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,732 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 18:46:32,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917266183] [2020-04-17 18:46:32,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917266183] [2020-04-17 18:46:32,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131946141] [2020-04-17 18:46:32,821 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,872 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:32,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:32,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 18:46:32,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201906912] [2020-04-17 18:46:32,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 18:46:32,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 18:46:32,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:46:32,893 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 18:46:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,968 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 18:46:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:32,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 18:46:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,970 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:32,970 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 18:46:32,970 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 18:46:32,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 18:46:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 18:46:32,976 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 18:46:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,976 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 18:46:32,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 18:46:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 18:46:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:32,977 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,977 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,181 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 18:46:33,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049690691] [2020-04-17 18:46:33,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049690691] [2020-04-17 18:46:33,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838695959] [2020-04-17 18:46:33,249 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,296 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:33,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:33,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322428119] [2020-04-17 18:46:33,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:33,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:33,328 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 18:46:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:33,465 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 18:46:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:46:33,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:33,466 INFO L225 Difference]: With dead ends: 58 [2020-04-17 18:46:33,466 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 18:46:33,467 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 18:46:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 18:46:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:46:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 18:46:33,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 18:46:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:33,472 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 18:46:33,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 18:46:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:33,473 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:33,473 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,679 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 18:46:33,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088371700] [2020-04-17 18:46:33,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088371700] [2020-04-17 18:46:33,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311159587] [2020-04-17 18:46:33,748 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 18:46:33,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190636291] [2020-04-17 18:46:33,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 18:46:33,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 18:46:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:46:33,856 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 18:46:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,013 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 18:46:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:34,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 18:46:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,015 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:34,015 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:46:34,015 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:46:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 18:46:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 18:46:34,027 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 18:46:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,027 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 18:46:34,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 18:46:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 18:46:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:34,028 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,028 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:34,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,232 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,232 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 18:46:34,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052842508] [2020-04-17 18:46:34,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052842508] [2020-04-17 18:46:34,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399857321] [2020-04-17 18:46:34,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:34,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:34,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629283083] [2020-04-17 18:46:34,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:34,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:34,402 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 18:46:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,585 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 18:46:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:34,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,586 INFO L225 Difference]: With dead ends: 62 [2020-04-17 18:46:34,587 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:34,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:46:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 18:46:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 18:46:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 18:46:34,593 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 18:46:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,593 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 18:46:34,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 18:46:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:34,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,594 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:34,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,801 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 18:46:34,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657803547] [2020-04-17 18:46:34,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657803547] [2020-04-17 18:46:34,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868913504] [2020-04-17 18:46:34,869 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:46:34,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 18:46:34,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681609764] [2020-04-17 18:46:34,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:34,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:34,935 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 18:46:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:35,042 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 18:46:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:46:35,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 18:46:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:35,044 INFO L225 Difference]: With dead ends: 64 [2020-04-17 18:46:35,044 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 18:46:35,044 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 18:46:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 18:46:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 18:46:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 18:46:35,049 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 18:46:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:35,049 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 18:46:35,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 18:46:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:35,050 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:35,050 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:35,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,254 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:35,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 18:46:35,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:35,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976489676] [2020-04-17 18:46:35,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976489676] [2020-04-17 18:46:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580953397] [2020-04-17 18:46:35,364 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,436 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:35,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:35,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:35,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:35,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:35,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:35,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333224707] [2020-04-17 18:46:35,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:35,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:35,493 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 18:46:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:35,674 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 18:46:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:35,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:35,675 INFO L225 Difference]: With dead ends: 61 [2020-04-17 18:46:35,675 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:35,676 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 18:46:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 18:46:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 18:46:35,687 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 18:46:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:35,688 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 18:46:35,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 18:46:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:35,691 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:35,691 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:35,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,898 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 18:46:35,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:35,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029270524] [2020-04-17 18:46:35,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029270524] [2020-04-17 18:46:35,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475587975] [2020-04-17 18:46:35,958 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:36,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:36,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:36,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:36,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 18:46:36,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608479628] [2020-04-17 18:46:36,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:36,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:36,055 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 18:46:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:36,216 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 18:46:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:36,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 18:46:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:36,218 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:36,218 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:36,222 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:46:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 18:46:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 18:46:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 18:46:36,231 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 18:46:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:36,232 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 18:46:36,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 18:46:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:36,233 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:36,233 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:36,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,436 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 18:46:36,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:36,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98285772] [2020-04-17 18:46:36,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98285772] [2020-04-17 18:46:36,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394723770] [2020-04-17 18:46:36,496 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,547 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:36,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:36,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:36,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:36,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:36,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748339661] [2020-04-17 18:46:36,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:36,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:36,576 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 18:46:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:36,791 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-04-17 18:46:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:36,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:36,792 INFO L225 Difference]: With dead ends: 56 [2020-04-17 18:46:36,792 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 18:46:36,793 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 18:46:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-04-17 18:46:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 18:46:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 18:46:36,796 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 18:46:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:36,796 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 18:46:36,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 18:46:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:36,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:36,797 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:37,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,005 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 18:46:37,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:37,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290450147] [2020-04-17 18:46:37,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290450147] [2020-04-17 18:46:37,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27103027] [2020-04-17 18:46:37,105 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:37,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:37,167 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:37,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:37,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:37,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847833420] [2020-04-17 18:46:37,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:37,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:37,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:37,208 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 18:46:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:37,415 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 18:46:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:37,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:37,416 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:37,416 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:37,417 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:46:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 18:46:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:37,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 18:46:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:37,421 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:37,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:37,422 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:37,422 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:37,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,629 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 18:46:37,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:37,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605063351] [2020-04-17 18:46:37,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605063351] [2020-04-17 18:46:37,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751677531] [2020-04-17 18:46:37,715 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:37,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:37,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:37,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:37,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:37,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:37,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546271062] [2020-04-17 18:46:37,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:37,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:37,812 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 18:46:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:38,006 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 18:46:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:38,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:38,008 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:38,008 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 18:46:38,009 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 18:46:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 18:46:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 18:46:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 18:46:38,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 18:46:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:38,013 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 18:46:38,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 18:46:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:38,014 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:38,014 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:38,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,218 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 18:46:38,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:38,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903589533] [2020-04-17 18:46:38,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903589533] [2020-04-17 18:46:38,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302640877] [2020-04-17 18:46:38,294 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:38,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:38,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:38,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:38,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:38,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895061311] [2020-04-17 18:46:38,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:38,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:38,371 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 18:46:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:38,498 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 18:46:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:46:38,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:38,500 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:38,500 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:38,500 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 18:46:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 18:46:38,504 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 18:46:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:38,505 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 18:46:38,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 18:46:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:38,506 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:38,506 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:38,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,711 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 18:46:38,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:38,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881120420] [2020-04-17 18:46:38,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881120420] [2020-04-17 18:46:38,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015821383] [2020-04-17 18:46:38,793 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,859 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:38,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:38,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:38,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:38,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:38,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:38,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879839449] [2020-04-17 18:46:38,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:38,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:38,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:38,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:38,889 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 18:46:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:39,024 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 18:46:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:39,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:39,026 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:39,026 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 18:46:39,027 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 18:46:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 18:46:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 18:46:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 18:46:39,030 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 18:46:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:39,030 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 18:46:39,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 18:46:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:39,031 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:39,031 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:39,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,234 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 18:46:39,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:39,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141064605] [2020-04-17 18:46:39,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141064605] [2020-04-17 18:46:39,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232726848] [2020-04-17 18:46:39,344 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,390 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:39,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:39,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:39,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:39,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:39,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14843799] [2020-04-17 18:46:39,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:39,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:39,406 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 18:46:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:39,574 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 18:46:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:39,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:39,575 INFO L225 Difference]: With dead ends: 67 [2020-04-17 18:46:39,575 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:39,576 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 18:46:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 18:46:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 18:46:39,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 18:46:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:39,579 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 18:46:39,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 18:46:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:39,580 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:39,580 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:39,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,784 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 18:46:39,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:39,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693412269] [2020-04-17 18:46:39,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693412269] [2020-04-17 18:46:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226482967] [2020-04-17 18:46:39,887 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:39,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:39,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:39,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:39,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:39,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:39,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727428734] [2020-04-17 18:46:39,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:39,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:39,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:39,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:39,962 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 18:46:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:40,166 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 18:46:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:40,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:40,173 INFO L225 Difference]: With dead ends: 69 [2020-04-17 18:46:40,173 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 18:46:40,174 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 18:46:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 18:46:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:40,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 18:46:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:40,177 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:40,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:40,178 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:40,178 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:40,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,383 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 18:46:40,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:40,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752143622] [2020-04-17 18:46:40,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752143622] [2020-04-17 18:46:40,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917110211] [2020-04-17 18:46:40,451 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:40,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:40,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:40,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:40,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498004949] [2020-04-17 18:46:40,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:40,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:40,529 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 18:46:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:40,722 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 18:46:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:40,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:40,726 INFO L225 Difference]: With dead ends: 88 [2020-04-17 18:46:40,727 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 18:46:40,727 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 18:46:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 18:46:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 18:46:40,731 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 18:46:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:40,731 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 18:46:40,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 18:46:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:40,732 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:40,732 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:40,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,937 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 18:46:40,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:40,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408268686] [2020-04-17 18:46:40,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408268686] [2020-04-17 18:46:41,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635303820] [2020-04-17 18:46:41,001 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:41,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:41,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:41,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:41,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:41,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36254033] [2020-04-17 18:46:41,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:41,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:41,070 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 18:46:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:41,317 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 18:46:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:41,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:41,318 INFO L225 Difference]: With dead ends: 69 [2020-04-17 18:46:41,318 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:41,319 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 18:46:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 18:46:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 18:46:41,322 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 18:46:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:41,322 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 18:46:41,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 18:46:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:41,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:41,324 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:41,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,530 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 18:46:41,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:41,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176426656] [2020-04-17 18:46:41,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176426656] [2020-04-17 18:46:41,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307295317] [2020-04-17 18:46:41,623 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:41,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:41,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:41,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:41,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:41,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52470541] [2020-04-17 18:46:41,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:41,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:41,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:41,704 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 18:46:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:42,071 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 18:46:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:42,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:42,072 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:42,072 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:42,072 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 18:46:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:42,075 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 18:46:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:42,076 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:42,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:42,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:42,076 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:42,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,280 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 18:46:42,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:42,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357641236] [2020-04-17 18:46:42,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357641236] [2020-04-17 18:46:42,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058253503] [2020-04-17 18:46:42,382 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,429 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:42,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:42,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:42,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:42,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:42,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:42,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786292236] [2020-04-17 18:46:42,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:42,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:42,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:42,463 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 18:46:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:42,662 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 18:46:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:42,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:42,663 INFO L225 Difference]: With dead ends: 71 [2020-04-17 18:46:42,663 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 18:46:42,664 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 18:46:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 18:46:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:42,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 18:46:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:42,667 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:42,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:42,667 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:42,667 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:42,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,871 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 18:46:42,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:42,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069684060] [2020-04-17 18:46:42,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069684060] [2020-04-17 18:46:42,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091646666] [2020-04-17 18:46:42,947 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:43,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:43,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:43,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:43,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:43,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193408173] [2020-04-17 18:46:43,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:43,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:43,027 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 18:46:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:43,193 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 18:46:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:43,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:43,195 INFO L225 Difference]: With dead ends: 68 [2020-04-17 18:46:43,195 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 18:46:43,196 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 18:46:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 18:46:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:43,199 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 18:46:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:43,199 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:43,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:43,200 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:43,200 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:43,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,403 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 18:46:43,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:43,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148157096] [2020-04-17 18:46:43,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148157096] [2020-04-17 18:46:43,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024596816] [2020-04-17 18:46:43,478 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,525 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:43,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:43,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:43,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:43,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:43,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:43,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157466246] [2020-04-17 18:46:43,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:43,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:43,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:43,557 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 18:46:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:43,821 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 18:46:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:43,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:43,822 INFO L225 Difference]: With dead ends: 67 [2020-04-17 18:46:43,822 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:43,822 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:46:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 18:46:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:43,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:43,826 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 18:46:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:43,826 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:43,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:43,827 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:43,827 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:44,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,031 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 18:46:44,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:44,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552326521] [2020-04-17 18:46:44,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552326521] [2020-04-17 18:46:44,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974247115] [2020-04-17 18:46:44,098 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:44,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:44,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:44,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921632798] [2020-04-17 18:46:44,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:44,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:44,154 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 18:46:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:44,356 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 18:46:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:44,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:44,358 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:46:44,358 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:46:44,359 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:46:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 18:46:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 18:46:44,362 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 18:46:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:44,362 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 18:46:44,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 18:46:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:44,363 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:44,363 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:44,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,564 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 18:46:44,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:44,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913554427] [2020-04-17 18:46:44,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913554427] [2020-04-17 18:46:44,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643642359] [2020-04-17 18:46:44,626 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:44,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:44,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:44,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:44,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:44,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:44,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271774539] [2020-04-17 18:46:44,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:44,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:44,717 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 18:46:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:45,030 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-04-17 18:46:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:45,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:45,032 INFO L225 Difference]: With dead ends: 64 [2020-04-17 18:46:45,032 INFO L226 Difference]: Without dead ends: 56 [2020-04-17 18:46:45,033 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-04-17 18:46:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-04-17 18:46:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 18:46:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 18:46:45,035 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 18:46:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:45,035 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 18:46:45,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 18:46:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:45,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:45,036 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:45,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,240 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 18:46:45,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:45,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530890944] [2020-04-17 18:46:45,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530890944] [2020-04-17 18:46:45,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747699094] [2020-04-17 18:46:45,303 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:45,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:45,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:45,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:45,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:45,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:45,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609531915] [2020-04-17 18:46:45,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:45,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:45,413 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 18:46:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:45,706 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 18:46:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:45,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:45,707 INFO L225 Difference]: With dead ends: 68 [2020-04-17 18:46:45,707 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 18:46:45,708 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 18:46:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 18:46:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 18:46:45,711 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 18:46:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:45,711 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 18:46:45,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 18:46:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:45,712 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:45,712 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:45,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,916 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 18:46:45,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:45,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990532935] [2020-04-17 18:46:45,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990532935] [2020-04-17 18:46:45,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098134824] [2020-04-17 18:46:45,981 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:46,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:46,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:46,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:46,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:46,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:46,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856928651] [2020-04-17 18:46:46,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:46,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:46,060 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 18:46:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:46,344 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 18:46:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:46,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:46,351 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:46,351 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:46,351 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 18:46:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 18:46:46,353 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 18:46:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:46,354 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 18:46:46,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 18:46:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:46,354 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:46,355 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:46,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,558 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 18:46:46,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:46,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934374440] [2020-04-17 18:46:46,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934374440] [2020-04-17 18:46:46,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713355677] [2020-04-17 18:46:46,639 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,692 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:46,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:46,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:46,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:46,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:46,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444342827] [2020-04-17 18:46:46,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:46,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:46,714 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 18:46:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:46,841 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 18:46:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:46,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:46,842 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:46,842 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 18:46:46,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:46:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 18:46:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 18:46:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 18:46:46,845 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 18:46:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:46,846 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 18:46:46,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 18:46:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:46,846 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:46,846 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:47,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,050 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 18:46:47,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:47,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338146218] [2020-04-17 18:46:47,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338146218] [2020-04-17 18:46:47,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888525112] [2020-04-17 18:46:47,182 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,254 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:47,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:47,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:47,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:47,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:47,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:47,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639721014] [2020-04-17 18:46:47,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:47,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:47,302 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 18:46:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:47,587 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 18:46:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:47,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:47,589 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:47,589 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:47,589 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 18:46:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 18:46:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 18:46:47,596 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 18:46:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:47,596 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 18:46:47,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 18:46:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:47,597 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:47,598 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:47,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,804 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 18:46:47,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:47,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80832041] [2020-04-17 18:46:47,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80832041] [2020-04-17 18:46:47,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718730726] [2020-04-17 18:46:47,912 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,961 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:47,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:47,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:47,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049586935] [2020-04-17 18:46:47,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:47,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:47,975 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 18:46:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:48,161 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 18:46:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:48,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:48,162 INFO L225 Difference]: With dead ends: 75 [2020-04-17 18:46:48,163 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 18:46:48,163 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 18:46:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 18:46:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:48,166 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 18:46:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:48,167 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:48,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:48,167 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:48,167 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:48,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,370 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 18:46:48,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:48,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708125700] [2020-04-17 18:46:48,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708125700] [2020-04-17 18:46:48,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494663435] [2020-04-17 18:46:48,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:48,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:48,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:48,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:48,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:48,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:48,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353321428] [2020-04-17 18:46:48,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:48,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:48,536 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 18:46:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:48,777 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 18:46:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:48,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:48,778 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:46:48,778 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:46:48,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:46:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:46:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 18:46:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:48,780 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 18:46:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:48,781 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:48,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:48,781 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:48,781 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:48,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,982 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:48,982 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 18:46:48,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:48,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503302804] [2020-04-17 18:46:48,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503302804] [2020-04-17 18:46:49,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911876844] [2020-04-17 18:46:49,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:49,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:49,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:49,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:49,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:49,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512582455] [2020-04-17 18:46:49,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:49,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:49,135 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 18:46:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:49,388 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 18:46:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:49,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:49,389 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:46:49,389 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:46:49,390 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:46:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 18:46:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 18:46:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 18:46:49,392 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 18:46:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:49,392 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 18:46:49,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 18:46:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:49,393 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:49,393 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:49,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,593 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 18:46:49,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:49,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991425378] [2020-04-17 18:46:49,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991425378] [2020-04-17 18:46:49,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150639596] [2020-04-17 18:46:49,715 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:49,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:49,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:49,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:49,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:49,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:49,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680134839] [2020-04-17 18:46:49,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:49,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:49,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:49,821 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 18:46:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:50,240 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 18:46:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:50,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:50,242 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:46:50,242 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:46:50,243 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:46:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 18:46:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 18:46:50,247 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 18:46:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:50,247 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 18:46:50,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 18:46:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:50,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:50,249 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:50,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,453 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 18:46:50,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:50,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539326433] [2020-04-17 18:46:50,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539326433] [2020-04-17 18:46:50,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553860248] [2020-04-17 18:46:50,524 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,570 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:50,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:50,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:50,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:50,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:50,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26541499] [2020-04-17 18:46:50,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:50,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:50,585 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 18:46:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:50,867 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 18:46:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:50,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:50,868 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:46:50,869 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:46:50,869 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:46:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 18:46:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 18:46:50,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 18:46:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:50,873 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 18:46:50,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 18:46:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:50,874 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:50,874 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:51,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,077 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 18:46:51,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:51,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996808652] [2020-04-17 18:46:51,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996808652] [2020-04-17 18:46:51,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612852135] [2020-04-17 18:46:51,164 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,219 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:51,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:51,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:51,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:51,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:51,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:51,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965658963] [2020-04-17 18:46:51,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:51,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:51,283 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 18:46:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:51,715 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 18:46:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:51,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:51,717 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:51,717 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 18:46:51,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 18:46:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 18:46:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:46:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 18:46:51,721 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 18:46:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:51,722 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 18:46:51,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 18:46:51,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:51,723 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:51,723 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:51,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,927 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 18:46:51,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:51,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677326798] [2020-04-17 18:46:51,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677326798] [2020-04-17 18:46:52,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783845345] [2020-04-17 18:46:52,079 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:52,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:52,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:52,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098049878] [2020-04-17 18:46:52,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:52,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:52,137 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 18:46:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:52,299 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 18:46:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:52,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:52,300 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:46:52,301 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:46:52,301 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:46:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 18:46:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:52,304 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:52,304 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:52,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:52,305 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:52,305 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:52,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,508 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:52,508 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 18:46:52,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:52,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698535351] [2020-04-17 18:46:52,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698535351] [2020-04-17 18:46:52,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439761469] [2020-04-17 18:46:52,614 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:52,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:52,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:52,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:52,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:52,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:52,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101826628] [2020-04-17 18:46:52,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:52,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:52,703 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:52,949 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 18:46:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:52,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:52,950 INFO L225 Difference]: With dead ends: 81 [2020-04-17 18:46:52,951 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:46:52,951 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:46:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 18:46:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:52,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:52,954 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:52,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:52,954 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:52,954 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:53,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,158 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 18:46:53,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:53,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065404654] [2020-04-17 18:46:53,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065404654] [2020-04-17 18:46:53,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234670975] [2020-04-17 18:46:53,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:53,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:53,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:53,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:53,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:53,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642845517] [2020-04-17 18:46:53,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:53,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:53,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:53,334 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:53,551 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 18:46:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:53,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:53,553 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:53,553 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:46:53,554 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:46:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:46:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 18:46:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:53,557 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:53,558 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:53,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:53,558 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:53,559 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:53,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,762 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 18:46:53,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:53,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983728125] [2020-04-17 18:46:53,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983728125] [2020-04-17 18:46:53,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262090757] [2020-04-17 18:46:53,874 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:53,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:53,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:53,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:53,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:53,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:53,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055374670] [2020-04-17 18:46:53,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:53,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:53,978 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:54,344 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 18:46:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:54,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:54,345 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:54,345 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:54,345 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 18:46:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:54,348 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:54,348 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:54,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:54,349 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:54,349 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:54,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,550 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 18:46:54,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:54,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543446481] [2020-04-17 18:46:54,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543446481] [2020-04-17 18:46:54,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496804714] [2020-04-17 18:46:54,638 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,686 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:54,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:54,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:54,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:54,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:54,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382925094] [2020-04-17 18:46:54,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:54,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:54,708 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:54,956 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 18:46:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:54,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:54,957 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:54,957 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:54,958 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:54,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 18:46:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:54,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:54,961 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:54,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:54,962 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:54,962 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:55,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,165 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 18:46:55,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:55,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330504280] [2020-04-17 18:46:55,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330504280] [2020-04-17 18:46:55,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012838771] [2020-04-17 18:46:55,244 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,295 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:55,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:55,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:46:55,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:55,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:55,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749978874] [2020-04-17 18:46:55,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:55,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:55,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:55,333 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:55,623 INFO L93 Difference]: Finished difference Result 71 states and 169 transitions. [2020-04-17 18:46:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:55,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:55,624 INFO L225 Difference]: With dead ends: 71 [2020-04-17 18:46:55,624 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 18:46:55,625 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 18:46:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-04-17 18:46:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:55,628 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:55,629 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:55,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:55,629 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:55,629 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:55,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,833 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 18:46:55,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:55,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505156683] [2020-04-17 18:46:55,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505156683] [2020-04-17 18:46:55,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543999916] [2020-04-17 18:46:55,922 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:55,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:55,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:55,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176714849] [2020-04-17 18:46:55,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:55,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:55,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:55,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:55,981 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:56,306 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 18:46:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:56,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:56,308 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:56,308 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:56,308 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 18:46:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 18:46:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 18:46:56,312 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 18:46:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:56,312 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 18:46:56,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 18:46:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:56,313 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:56,313 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:56,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,516 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:56,517 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 18:46:56,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:56,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590956701] [2020-04-17 18:46:56,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590956701] [2020-04-17 18:46:56,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880996255] [2020-04-17 18:46:56,603 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:56,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:56,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:56,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:56,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:56,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:56,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69130727] [2020-04-17 18:46:56,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:56,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:56,733 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 18:46:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:57,120 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-04-17 18:46:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:46:57,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:57,122 INFO L225 Difference]: With dead ends: 70 [2020-04-17 18:46:57,122 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 18:46:57,123 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:46:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 18:46:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-04-17 18:46:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 18:46:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 18:46:57,127 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 18:46:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:57,127 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 18:46:57,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 18:46:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:57,128 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:57,128 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:57,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:57,331 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 18:46:57,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:57,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620694826] [2020-04-17 18:46:57,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:57,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620694826] [2020-04-17 18:46:57,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320582508] [2020-04-17 18:46:57,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:57,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:57,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:57,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:57,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:57,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:57,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:57,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:57,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269588725] [2020-04-17 18:46:57,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:57,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:57,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:57,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:57,542 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 18:46:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:57,896 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 18:46:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:57,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:57,897 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:46:57,897 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:57,898 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:46:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 18:46:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 18:46:57,900 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 18:46:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:57,901 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 18:46:57,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 18:46:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:57,901 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:57,901 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:58,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,105 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 18:46:58,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:58,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372323242] [2020-04-17 18:46:58,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372323242] [2020-04-17 18:46:58,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619212238] [2020-04-17 18:46:58,192 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:58,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:58,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:58,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:58,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:58,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:58,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109227459] [2020-04-17 18:46:58,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:58,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:58,283 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 18:46:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:58,694 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 18:46:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:58,695 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:58,696 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:58,696 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:58,696 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:46:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 18:46:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:58,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 18:46:58,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 18:46:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:58,699 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 18:46:58,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 18:46:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:58,700 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:58,700 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:58,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,903 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 18:46:58,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:58,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371829245] [2020-04-17 18:46:58,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371829245] [2020-04-17 18:46:59,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716203107] [2020-04-17 18:46:59,008 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:59,054 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:46:59,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:59,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:59,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:59,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:59,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75430128] [2020-04-17 18:46:59,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:59,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:59,071 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 18:46:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:59,239 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 18:46:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:59,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:59,240 INFO L225 Difference]: With dead ends: 72 [2020-04-17 18:46:59,240 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 18:46:59,241 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:46:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 18:46:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 18:46:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 18:46:59,244 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 18:46:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:59,244 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 18:46:59,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 18:46:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:59,245 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:59,245 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:59,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:59,448 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 18:46:59,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:59,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712918456] [2020-04-17 18:46:59,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712918456] [2020-04-17 18:46:59,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122781234] [2020-04-17 18:46:59,570 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:59,626 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:46:59,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:59,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:59,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:59,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:59,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:59,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899633394] [2020-04-17 18:46:59,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:59,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:59,685 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 18:46:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:59,924 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 18:46:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:59,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:59,926 INFO L225 Difference]: With dead ends: 82 [2020-04-17 18:46:59,926 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 18:46:59,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 18:46:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 18:46:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 18:46:59,928 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 18:46:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:59,929 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 18:46:59,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 18:46:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:59,929 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:59,929 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:00,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,135 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 18:47:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:00,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922353479] [2020-04-17 18:47:00,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922353479] [2020-04-17 18:47:00,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716951536] [2020-04-17 18:47:00,263 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:00,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:00,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:47:00,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445916163] [2020-04-17 18:47:00,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:47:00,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:47:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:47:00,345 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 18:47:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:00,612 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 18:47:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:47:00,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:47:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:00,614 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:47:00,614 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:47:00,615 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:47:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:47:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 18:47:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:47:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 18:47:00,617 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 18:47:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:00,618 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 18:47:00,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:47:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 18:47:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:00,618 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:00,618 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:00,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,822 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 18:47:00,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:00,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507999457] [2020-04-17 18:47:00,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507999457] [2020-04-17 18:47:00,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98285109] [2020-04-17 18:47:00,939 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:00,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:00,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:00,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:00,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:01,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:01,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:47:01,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565888046] [2020-04-17 18:47:01,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:01,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:01,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:01,008 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 18:47:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:01,277 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 18:47:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:47:01,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:47:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:01,282 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:47:01,282 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:47:01,282 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:47:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:47:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 18:47:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:47:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 18:47:01,285 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 18:47:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:01,286 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 18:47:01,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 18:47:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:01,286 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:01,286 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:01,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:01,489 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 18:47:01,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:01,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47426760] [2020-04-17 18:47:01,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:01,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47426760] [2020-04-17 18:47:01,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103599321] [2020-04-17 18:47:01,587 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:01,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:47:01,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:01,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:01,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:01,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:01,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:47:01,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054493886] [2020-04-17 18:47:01,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:47:01,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:01,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:47:01,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:47:01,653 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 18:47:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:01,929 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 18:47:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:47:01,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:47:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:01,932 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:47:01,932 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:47:01,932 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:47:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:47:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 18:47:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:47:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:47:01,936 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 18:47:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:01,936 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:47:01,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:47:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:47:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:01,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:01,938 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:02,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:02,142 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 18:47:02,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:02,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606868769] [2020-04-17 18:47:02,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:02,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606868769] [2020-04-17 18:47:02,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893990972] [2020-04-17 18:47:02,247 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:02,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:02,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:02,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:02,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:02,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:02,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:02,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:47:02,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319732238] [2020-04-17 18:47:02,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:02,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:02,324 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 18:47:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:02,672 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 18:47:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:47:02,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:47:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:02,673 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:47:02,673 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:47:02,673 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:47:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:47:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 18:47:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:47:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:47:02,675 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 18:47:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:02,675 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:47:02,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:47:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:02,676 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:02,676 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:02,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:02,879 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 18:47:02,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:02,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103937882] [2020-04-17 18:47:02,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:02,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103937882] [2020-04-17 18:47:02,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338948729] [2020-04-17 18:47:02,970 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:03,034 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:47:03,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:03,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:03,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:03,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:03,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:47:03,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537545784] [2020-04-17 18:47:03,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:47:03,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:47:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:47:03,048 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 18:47:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:03,351 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 18:47:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:03,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:47:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:03,352 INFO L225 Difference]: With dead ends: 87 [2020-04-17 18:47:03,352 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:47:03,353 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:47:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:47:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 18:47:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 18:47:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 18:47:03,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 18:47:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:03,358 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 18:47:03,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:47:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 18:47:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:03,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:03,359 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:03,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:03,562 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:03,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 18:47:03,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:03,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134528217] [2020-04-17 18:47:03,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:03,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134528217] [2020-04-17 18:47:03,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406169318] [2020-04-17 18:47:03,643 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:03,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:47:03,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:03,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:03,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:03,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:03,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:03,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:47:03,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077421258] [2020-04-17 18:47:03,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:03,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:03,728 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 18:47:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:04,128 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 18:47:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:04,129 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:47:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:04,130 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:47:04,130 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:47:04,131 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:47:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:47:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 18:47:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:47:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 18:47:04,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 18:47:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:04,134 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 18:47:04,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 18:47:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:04,135 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:04,135 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:04,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:04,338 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 18:47:04,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:04,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395812373] [2020-04-17 18:47:04,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:04,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395812373] [2020-04-17 18:47:04,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276092026] [2020-04-17 18:47:04,418 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:04,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:04,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:04,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:04,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:47:04,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337735516] [2020-04-17 18:47:04,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:47:04,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:47:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:47:04,477 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 18:47:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:04,851 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 18:47:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:04,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:47:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:04,852 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:47:04,853 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:47:04,853 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:47:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 18:47:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:47:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 18:47:04,856 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 18:47:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:04,856 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 18:47:04,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:47:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 18:47:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:47:04,857 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:04,857 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:05,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:05,060 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 18:47:05,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:05,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028570319] [2020-04-17 18:47:05,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:05,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028570319] [2020-04-17 18:47:05,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740766596] [2020-04-17 18:47:05,146 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:05,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:05,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:05,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:47:05,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:05,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:05,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:05,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:47:05,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567306811] [2020-04-17 18:47:05,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:05,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:05,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:05,231 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 18:47:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:05,668 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 18:47:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:05,669 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:47:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:05,670 INFO L225 Difference]: With dead ends: 85 [2020-04-17 18:47:05,670 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:47:05,670 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:47:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 18:47:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 18:47:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 18:47:05,673 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 18:47:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:05,673 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 18:47:05,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 18:47:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:05,674 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:05,674 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:05,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:05,875 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 18:47:05,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:05,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267414807] [2020-04-17 18:47:05,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267414807] [2020-04-17 18:47:06,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488051468] [2020-04-17 18:47:06,003 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:06,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:47:06,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:06,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:06,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:06,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:06,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785028203] [2020-04-17 18:47:06,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:06,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:06,110 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 18:47:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:06,399 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 18:47:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:47:06,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:06,401 INFO L225 Difference]: With dead ends: 94 [2020-04-17 18:47:06,401 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 18:47:06,402 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:47:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 18:47:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 18:47:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:06,404 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:47:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:06,405 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:06,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:06,406 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:06,406 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:06,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:06,611 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 18:47:06,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:06,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945026572] [2020-04-17 18:47:06,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945026572] [2020-04-17 18:47:06,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175198750] [2020-04-17 18:47:06,747 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:06,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:06,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:06,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:06,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:06,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:06,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:06,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622093263] [2020-04-17 18:47:06,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:06,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:06,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:06,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:06,857 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:07,137 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 18:47:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:47:07,137 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:07,138 INFO L225 Difference]: With dead ends: 91 [2020-04-17 18:47:07,139 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 18:47:07,139 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:47:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 18:47:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 18:47:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:07,142 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:07,142 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:07,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:07,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:07,143 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:07,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:07,346 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 18:47:07,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:07,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023426315] [2020-04-17 18:47:07,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:07,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023426315] [2020-04-17 18:47:07,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540659891] [2020-04-17 18:47:07,454 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:07,502 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:47:07,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:07,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:07,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:07,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:07,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:07,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700490944] [2020-04-17 18:47:07,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:07,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:07,514 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:07,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:07,758 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 18:47:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:47:07,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:07,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:07,759 INFO L225 Difference]: With dead ends: 88 [2020-04-17 18:47:07,759 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 18:47:07,760 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:47:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 18:47:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 18:47:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:07,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:47:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:07,763 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:07,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:07,764 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:07,764 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:07,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:07,968 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 18:47:07,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:07,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515722116] [2020-04-17 18:47:07,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:08,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515722116] [2020-04-17 18:47:08,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535187845] [2020-04-17 18:47:08,101 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:08,153 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:47:08,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:08,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:08,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:08,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:08,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:08,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:08,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936959923] [2020-04-17 18:47:08,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:08,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:08,183 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:08,520 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 18:47:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:47:08,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:08,522 INFO L225 Difference]: With dead ends: 87 [2020-04-17 18:47:08,522 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:47:08,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:47:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:47:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 18:47:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:08,525 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:08,525 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:08,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:08,526 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:08,526 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:08,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:08,726 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 18:47:08,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:08,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517848077] [2020-04-17 18:47:08,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:08,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517848077] [2020-04-17 18:47:08,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64844907] [2020-04-17 18:47:08,832 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:08,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:08,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:08,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:08,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:08,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083341086] [2020-04-17 18:47:08,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:08,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:08,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:08,889 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:09,173 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 18:47:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:47:09,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:09,174 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:47:09,174 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:47:09,175 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:47:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:47:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 18:47:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:09,178 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:47:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:09,178 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:09,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:09,179 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:09,179 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:09,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:09,382 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 18:47:09,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:09,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922207513] [2020-04-17 18:47:09,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:09,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922207513] [2020-04-17 18:47:09,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608851246] [2020-04-17 18:47:09,480 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:09,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:09,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:09,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:09,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:09,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:09,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:09,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:09,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422639936] [2020-04-17 18:47:09,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:09,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:09,552 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:09,963 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 18:47:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:09,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:09,965 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:47:09,965 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:47:09,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:47:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 18:47:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:09,968 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:09,969 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:09,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:09,969 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:09,970 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:10,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:10,173 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 18:47:10,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:10,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188520866] [2020-04-17 18:47:10,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:10,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188520866] [2020-04-17 18:47:10,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670842743] [2020-04-17 18:47:10,270 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:10,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:47:10,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:10,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:10,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:10,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:10,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:10,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732954176] [2020-04-17 18:47:10,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:10,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:10,336 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:10,674 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 18:47:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:10,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:10,675 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:47:10,675 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 18:47:10,676 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:47:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 18:47:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 18:47:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:10,678 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:47:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:10,679 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:10,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:10,680 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:10,680 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:10,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:10,883 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 18:47:10,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:10,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25357304] [2020-04-17 18:47:10,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:10,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25357304] [2020-04-17 18:47:10,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082430625] [2020-04-17 18:47:10,989 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:11,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:11,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:11,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:11,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:11,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:11,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:11,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:11,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244142091] [2020-04-17 18:47:11,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:11,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:11,072 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:11,562 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 18:47:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:11,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:11,563 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:47:11,563 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:47:11,564 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:47:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:47:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 18:47:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:11,566 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:11,567 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:11,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:11,568 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:11,568 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:11,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:11,771 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:11,771 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 18:47:11,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:11,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330739982] [2020-04-17 18:47:11,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:11,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330739982] [2020-04-17 18:47:11,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779016587] [2020-04-17 18:47:11,859 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:11,906 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:47:11,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:11,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:11,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:11,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:11,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:11,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247601649] [2020-04-17 18:47:11,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:11,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:11,917 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:12,301 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 18:47:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:12,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:12,302 INFO L225 Difference]: With dead ends: 95 [2020-04-17 18:47:12,302 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 18:47:12,303 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 18:47:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 18:47:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:47:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 18:47:12,306 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 18:47:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:12,306 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 18:47:12,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 18:47:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:12,307 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:12,307 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:12,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:12,507 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 18:47:12,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:12,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332579695] [2020-04-17 18:47:12,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:12,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332579695] [2020-04-17 18:47:12,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278557282] [2020-04-17 18:47:12,616 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:12,664 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:47:12,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:12,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:12,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:12,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:12,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:12,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:12,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055000286] [2020-04-17 18:47:12,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:12,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:12,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:12,695 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 18:47:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:13,193 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-04-17 18:47:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:47:13,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:13,194 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:47:13,194 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:47:13,195 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:47:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:47:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-04-17 18:47:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 18:47:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 18:47:13,198 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 18:47:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:13,198 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 18:47:13,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 18:47:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:13,199 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:13,199 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:13,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:13,402 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 18:47:13,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:13,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851315534] [2020-04-17 18:47:13,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:13,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851315534] [2020-04-17 18:47:13,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567073986] [2020-04-17 18:47:13,480 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:13,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:13,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:13,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:13,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:13,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:13,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705127509] [2020-04-17 18:47:13,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:13,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:13,549 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 18:47:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:14,006 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 18:47:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:14,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:14,008 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:47:14,008 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 18:47:14,008 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:47:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 18:47:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 18:47:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:47:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 18:47:14,010 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 18:47:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:14,011 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 18:47:14,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 18:47:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:14,011 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:14,011 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:14,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:14,213 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 18:47:14,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:14,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481702535] [2020-04-17 18:47:14,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:14,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481702535] [2020-04-17 18:47:14,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812080140] [2020-04-17 18:47:14,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:14,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:14,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:14,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:14,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:14,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:14,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:14,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:14,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926240503] [2020-04-17 18:47:14,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:14,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:14,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:14,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:14,376 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-04-17 18:47:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:14,878 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-04-17 18:47:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:14,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:14,879 INFO L225 Difference]: With dead ends: 72 [2020-04-17 18:47:14,879 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 18:47:14,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:47:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 18:47:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-04-17 18:47:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:47:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-04-17 18:47:14,883 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-04-17 18:47:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:14,883 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-04-17 18:47:14,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-04-17 18:47:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:14,883 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:14,884 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:15,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:15,086 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:15,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:15,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 18:47:15,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:15,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180865154] [2020-04-17 18:47:15,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:15,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180865154] [2020-04-17 18:47:15,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010201718] [2020-04-17 18:47:15,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:15,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 18:47:15,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:15,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:15,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:15,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:15,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 18:47:15,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109473474] [2020-04-17 18:47:15,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:15,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:15,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:15,267 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-04-17 18:47:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:15,487 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-04-17 18:47:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:47:15,488 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 18:47:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:15,489 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:47:15,489 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:47:15,489 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:47:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:47:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-04-17 18:47:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:47:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-04-17 18:47:15,492 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-04-17 18:47:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:15,492 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-04-17 18:47:15,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-04-17 18:47:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:15,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:15,493 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:15,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:15,696 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-04-17 18:47:15,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:15,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115985991] [2020-04-17 18:47:15,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:15,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115985991] [2020-04-17 18:47:15,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288682156] [2020-04-17 18:47:15,837 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:15,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:15,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:15,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:15,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:15,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:15,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:15,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:15,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374668586] [2020-04-17 18:47:15,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:15,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:15,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:15,923 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-04-17 18:47:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:16,178 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-04-17 18:47:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:47:16,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:16,180 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:47:16,180 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 18:47:16,181 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:47:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 18:47:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-04-17 18:47:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:47:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-04-17 18:47:16,183 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-04-17 18:47:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:16,184 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-04-17 18:47:16,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-04-17 18:47:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:16,184 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:16,185 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:16,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:16,387 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-04-17 18:47:16,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:16,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686937598] [2020-04-17 18:47:16,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:16,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686937598] [2020-04-17 18:47:16,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693827889] [2020-04-17 18:47:16,505 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:16,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 18:47:16,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:16,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:16,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:16,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:16,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 18:47:16,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284334630] [2020-04-17 18:47:16,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:16,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:16,576 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-04-17 18:47:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:16,875 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-04-17 18:47:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:47:16,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 18:47:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:16,876 INFO L225 Difference]: With dead ends: 91 [2020-04-17 18:47:16,877 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 18:47:16,877 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:47:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 18:47:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-04-17 18:47:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 18:47:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-04-17 18:47:16,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-04-17 18:47:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:16,880 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-04-17 18:47:16,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-04-17 18:47:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:16,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:16,881 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:17,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:17,084 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-04-17 18:47:17,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:17,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608524892] [2020-04-17 18:47:17,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:17,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608524892] [2020-04-17 18:47:17,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891149827] [2020-04-17 18:47:17,218 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:17,268 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 18:47:17,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:17,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:17,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:17,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:17,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:17,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:17,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078509189] [2020-04-17 18:47:17,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:17,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:17,299 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-04-17 18:47:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:17,620 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-04-17 18:47:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:47:17,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:17,621 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:47:17,622 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:47:17,622 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:47:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:47:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-04-17 18:47:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:47:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-04-17 18:47:17,624 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-04-17 18:47:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:17,625 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-04-17 18:47:17,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-04-17 18:47:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:17,625 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:17,625 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:17,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:17,826 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:17,826 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-04-17 18:47:17,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:17,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177326621] [2020-04-17 18:47:17,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:18,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177326621] [2020-04-17 18:47:18,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554881531] [2020-04-17 18:47:18,008 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:18,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:18,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:18,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:18,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 18:47:18,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441015266] [2020-04-17 18:47:18,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:18,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:18,064 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-04-17 18:47:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:18,370 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 18:47:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:18,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 18:47:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:18,371 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:47:18,372 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:47:18,372 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:47:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-04-17 18:47:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 18:47:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-04-17 18:47:18,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-04-17 18:47:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:18,375 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-04-17 18:47:18,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-04-17 18:47:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:18,376 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:18,376 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:18,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:18,577 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-04-17 18:47:18,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:18,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981284868] [2020-04-17 18:47:18,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:18,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981284868] [2020-04-17 18:47:18,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058865763] [2020-04-17 18:47:18,714 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:18,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:18,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:18,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:18,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:18,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:18,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:18,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:18,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925624973] [2020-04-17 18:47:18,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:18,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:18,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:18,783 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-04-17 18:47:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:19,185 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-04-17 18:47:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:19,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:19,186 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:47:19,186 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:47:19,187 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:47:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-04-17 18:47:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 18:47:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-04-17 18:47:19,189 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-04-17 18:47:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:19,190 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-04-17 18:47:19,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-04-17 18:47:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:19,190 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:19,191 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:19,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:19,391 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-04-17 18:47:19,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:19,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887371868] [2020-04-17 18:47:19,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:19,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887371868] [2020-04-17 18:47:19,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872382457] [2020-04-17 18:47:19,494 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:19,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 18:47:19,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:19,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:19,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:19,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:19,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 18:47:19,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129298843] [2020-04-17 18:47:19,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:19,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:19,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:19,556 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-04-17 18:47:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:19,919 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-04-17 18:47:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:19,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 18:47:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:19,921 INFO L225 Difference]: With dead ends: 97 [2020-04-17 18:47:19,921 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 18:47:19,922 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:47:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 18:47:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-04-17 18:47:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:19,924 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-04-17 18:47:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:19,924 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:19,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:19,925 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:19,925 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:20,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:20,128 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-04-17 18:47:20,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:20,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593882099] [2020-04-17 18:47:20,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:20,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593882099] [2020-04-17 18:47:20,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260259424] [2020-04-17 18:47:20,261 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:20,310 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:20,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:20,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:20,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:20,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:20,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:20,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:20,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943385207] [2020-04-17 18:47:20,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:20,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:20,339 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-04-17 18:47:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:20,805 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 18:47:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:20,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:20,808 INFO L225 Difference]: With dead ends: 94 [2020-04-17 18:47:20,808 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 18:47:20,809 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 18:47:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 18:47:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-04-17 18:47:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:20,812 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-04-17 18:47:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:20,812 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:20,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:20,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:20,813 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:21,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:21,016 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-04-17 18:47:21,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:21,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844109892] [2020-04-17 18:47:21,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:21,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844109892] [2020-04-17 18:47:21,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301469310] [2020-04-17 18:47:21,108 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:21,152 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 18:47:21,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:21,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:21,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:21,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:21,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 18:47:21,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564666016] [2020-04-17 18:47:21,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:21,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:21,178 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-04-17 18:47:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:21,560 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-04-17 18:47:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:47:21,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 18:47:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:21,561 INFO L225 Difference]: With dead ends: 95 [2020-04-17 18:47:21,562 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 18:47:21,562 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:47:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 18:47:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-04-17 18:47:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 18:47:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-04-17 18:47:21,564 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-04-17 18:47:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:21,564 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-04-17 18:47:21,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-04-17 18:47:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:21,565 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:21,565 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:21,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:21,768 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-04-17 18:47:21,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:21,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568144243] [2020-04-17 18:47:21,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:21,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568144243] [2020-04-17 18:47:21,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209932503] [2020-04-17 18:47:21,865 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:21,911 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 18:47:21,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:21,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:21,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:21,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:21,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:21,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:21,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633237626] [2020-04-17 18:47:21,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:21,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:21,935 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-04-17 18:47:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:22,439 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-04-17 18:47:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:47:22,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:22,440 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:47:22,440 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 18:47:22,441 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:47:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 18:47:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-04-17 18:47:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:47:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 18:47:22,444 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-04-17 18:47:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:22,444 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 18:47:22,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 18:47:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:22,444 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:22,445 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:22,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:22,647 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-04-17 18:47:22,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:22,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237522023] [2020-04-17 18:47:22,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:22,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237522023] [2020-04-17 18:47:22,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761515888] [2020-04-17 18:47:22,732 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:22,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:22,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:22,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:22,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 18:47:22,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117696082] [2020-04-17 18:47:22,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:22,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:22,789 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-04-17 18:47:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:23,202 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-04-17 18:47:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:47:23,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 18:47:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:23,204 INFO L225 Difference]: With dead ends: 112 [2020-04-17 18:47:23,204 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 18:47:23,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:47:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 18:47:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-04-17 18:47:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:47:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-04-17 18:47:23,208 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-04-17 18:47:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:23,208 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-04-17 18:47:23,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-04-17 18:47:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:23,209 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:23,210 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:23,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:23,413 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-04-17 18:47:23,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:23,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500348796] [2020-04-17 18:47:23,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:23,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500348796] [2020-04-17 18:47:23,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36057869] [2020-04-17 18:47:23,498 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:23,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:23,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:23,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:23,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:23,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:23,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 18:47:23,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639160047] [2020-04-17 18:47:23,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:23,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:23,575 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-04-17 18:47:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:24,106 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-04-17 18:47:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:47:24,107 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 18:47:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:24,108 INFO L225 Difference]: With dead ends: 93 [2020-04-17 18:47:24,108 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 18:47:24,108 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:47:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 18:47:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-04-17 18:47:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 18:47:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-04-17 18:47:24,111 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-04-17 18:47:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:24,112 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-04-17 18:47:24,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-04-17 18:47:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:24,112 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:24,112 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:24,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:24,313 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-04-17 18:47:24,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:24,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835174040] [2020-04-17 18:47:24,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:24,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835174040] [2020-04-17 18:47:24,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499777554] [2020-04-17 18:47:24,449 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:24,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 18:47:24,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:24,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:24,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:24,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:24,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 18:47:24,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943923369] [2020-04-17 18:47:24,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:24,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:24,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:24,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:24,508 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-04-17 18:47:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:24,780 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-04-17 18:47:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:47:24,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 18:47:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:24,781 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:47:24,781 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:47:24,782 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:47:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:47:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-04-17 18:47:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:47:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 18:47:24,784 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 18:47:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:24,784 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 18:47:24,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 18:47:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:24,785 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:24,785 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:24,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:24,988 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-04-17 18:47:24,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:24,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108534892] [2020-04-17 18:47:24,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:25,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108534892] [2020-04-17 18:47:25,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160366392] [2020-04-17 18:47:25,125 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:25,171 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:25,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:25,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:25,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:25,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:25,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:25,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:25,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137358724] [2020-04-17 18:47:25,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:25,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:25,196 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 18:47:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:25,548 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-04-17 18:47:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:47:25,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:25,549 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:47:25,549 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 18:47:25,550 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 18:47:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-04-17 18:47:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:47:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 18:47:25,556 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 18:47:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:25,556 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 18:47:25,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 18:47:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:25,557 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:25,557 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:25,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:25,760 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-04-17 18:47:25,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:25,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48824425] [2020-04-17 18:47:25,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:25,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48824425] [2020-04-17 18:47:25,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967093331] [2020-04-17 18:47:25,890 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:25,934 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 18:47:25,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:25,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:25,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:25,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:25,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 18:47:25,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964914313] [2020-04-17 18:47:25,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:25,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:25,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:25,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:25,944 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 18:47:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:26,237 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-04-17 18:47:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:47:26,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 18:47:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:26,238 INFO L225 Difference]: With dead ends: 98 [2020-04-17 18:47:26,238 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 18:47:26,239 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:47:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 18:47:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-04-17 18:47:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:47:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 18:47:26,241 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 18:47:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:26,242 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 18:47:26,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 18:47:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:26,242 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:26,242 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:26,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:26,444 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-04-17 18:47:26,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:26,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685858065] [2020-04-17 18:47:26,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:26,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685858065] [2020-04-17 18:47:26,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893281845] [2020-04-17 18:47:26,576 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:26,626 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 18:47:26,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:26,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:26,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:26,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:26,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:26,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:26,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354262824] [2020-04-17 18:47:26,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:26,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:26,650 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 18:47:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:27,049 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-04-17 18:47:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:27,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:27,051 INFO L225 Difference]: With dead ends: 97 [2020-04-17 18:47:27,051 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 18:47:27,051 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:47:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 18:47:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-04-17 18:47:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:47:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 18:47:27,055 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 18:47:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:27,055 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 18:47:27,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 18:47:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:27,055 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:27,056 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:27,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:27,259 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-04-17 18:47:27,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:27,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110301436] [2020-04-17 18:47:27,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:27,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110301436] [2020-04-17 18:47:27,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771803181] [2020-04-17 18:47:27,382 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:27,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:27,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:27,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:27,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 18:47:27,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568667435] [2020-04-17 18:47:27,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:27,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:27,438 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 18:47:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:27,776 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-04-17 18:47:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:27,777 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 18:47:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:27,778 INFO L225 Difference]: With dead ends: 94 [2020-04-17 18:47:27,778 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 18:47:27,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 18:47:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-04-17 18:47:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:47:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 18:47:27,781 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 18:47:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:27,782 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 18:47:27,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 18:47:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:27,782 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:27,782 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:27,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:27,983 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-04-17 18:47:27,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:27,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399620447] [2020-04-17 18:47:27,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399620447] [2020-04-17 18:47:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658537564] [2020-04-17 18:47:28,106 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:28,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:28,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:28,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:28,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:28,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:28,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:28,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:28,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249145453] [2020-04-17 18:47:28,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:28,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:28,176 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 18:47:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:28,641 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-04-17 18:47:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:28,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:28,642 INFO L225 Difference]: With dead ends: 93 [2020-04-17 18:47:28,643 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 18:47:28,643 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:47:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 18:47:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-04-17 18:47:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:47:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 18:47:28,646 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 18:47:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:28,646 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 18:47:28,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 18:47:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:28,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:28,647 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:28,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:28,847 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-04-17 18:47:28,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:28,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720818782] [2020-04-17 18:47:28,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:28,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720818782] [2020-04-17 18:47:28,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878206751] [2020-04-17 18:47:28,954 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:29,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 18:47:29,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:29,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:29,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:29,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:29,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 18:47:29,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667089541] [2020-04-17 18:47:29,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:29,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:29,019 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 18:47:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:29,411 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-04-17 18:47:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:29,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 18:47:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:29,412 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:47:29,412 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 18:47:29,413 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 18:47:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 18:47:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-04-17 18:47:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:47:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 18:47:29,415 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 18:47:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:29,415 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 18:47:29,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 18:47:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:29,416 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:29,416 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:29,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:29,618 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-04-17 18:47:29,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:29,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300295722] [2020-04-17 18:47:29,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:29,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300295722] [2020-04-17 18:47:29,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64531412] [2020-04-17 18:47:29,728 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:29,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:29,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:29,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:29,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:29,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:29,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:29,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:29,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603696939] [2020-04-17 18:47:29,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:29,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:29,800 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 18:47:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:30,326 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 18:47:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:47:30,327 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:30,328 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:47:30,328 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:47:30,328 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:47:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:47:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-04-17 18:47:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:47:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 18:47:30,331 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 18:47:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:30,331 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 18:47:30,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 18:47:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:30,332 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:30,332 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:30,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:30,535 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:30,535 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-04-17 18:47:30,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:30,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226018782] [2020-04-17 18:47:30,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:30,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226018782] [2020-04-17 18:47:30,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998179807] [2020-04-17 18:47:30,638 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:30,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 18:47:30,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:30,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:30,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:30,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:30,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 18:47:30,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535482287] [2020-04-17 18:47:30,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:30,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:30,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:30,742 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 18:47:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:31,164 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-04-17 18:47:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:47:31,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 18:47:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:31,165 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:47:31,166 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:47:31,166 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:47:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:47:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-04-17 18:47:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:47:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 18:47:31,169 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 18:47:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:31,169 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 18:47:31,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 18:47:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:31,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:31,170 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:31,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:31,374 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-04-17 18:47:31,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:31,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109597780] [2020-04-17 18:47:31,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:31,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109597780] [2020-04-17 18:47:31,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581008436] [2020-04-17 18:47:31,480 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:31,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 18:47:31,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:31,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:31,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:31,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:31,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:31,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:31,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187353434] [2020-04-17 18:47:31,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:31,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:31,558 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 18:47:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:32,139 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-04-17 18:47:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:47:32,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:32,140 INFO L225 Difference]: With dead ends: 85 [2020-04-17 18:47:32,141 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 18:47:32,141 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:47:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 18:47:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-04-17 18:47:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:47:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 18:47:32,143 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 18:47:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:32,143 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 18:47:32,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 18:47:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:32,144 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:32,144 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:32,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:32,345 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-04-17 18:47:32,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:32,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552966402] [2020-04-17 18:47:32,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:32,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552966402] [2020-04-17 18:47:32,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908989089] [2020-04-17 18:47:32,445 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:32,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:32,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:32,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:32,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 18:47:32,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594728086] [2020-04-17 18:47:32,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:47:32,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:32,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:47:32,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:47:32,506 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 18:47:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:32,991 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 18:47:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:47:32,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 18:47:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:32,993 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:47:32,993 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 18:47:32,993 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:47:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 18:47:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-04-17 18:47:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 18:47:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-04-17 18:47:32,997 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-04-17 18:47:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:32,997 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-04-17 18:47:32,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:47:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-04-17 18:47:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:32,998 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:32,998 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:33,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:33,201 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-04-17 18:47:33,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:33,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737691054] [2020-04-17 18:47:33,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:33,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737691054] [2020-04-17 18:47:33,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179283413] [2020-04-17 18:47:33,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:33,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:33,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:33,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:33,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:33,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:33,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:33,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110819887] [2020-04-17 18:47:33,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:33,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:33,375 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-04-17 18:47:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:33,926 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-04-17 18:47:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:47:33,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:33,927 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:47:33,927 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:47:33,928 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:47:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:47:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-04-17 18:47:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 18:47:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-04-17 18:47:33,930 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-04-17 18:47:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:33,930 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-04-17 18:47:33,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-04-17 18:47:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:47:33,931 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:33,931 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:34,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:34,134 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-04-17 18:47:34,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:34,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701162761] [2020-04-17 18:47:34,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:34,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701162761] [2020-04-17 18:47:34,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112564186] [2020-04-17 18:47:34,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:34,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 18:47:34,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:34,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:47:34,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:34,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:34,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:34,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:47:34,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191953282] [2020-04-17 18:47:34,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:34,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:34,313 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-04-17 18:47:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:34,889 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 18:47:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:47:34,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 18:47:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:34,891 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:47:34,891 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 18:47:34,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:47:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 18:47:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-04-17 18:47:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:47:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 18:47:34,893 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-04-17 18:47:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:34,893 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 18:47:34,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 18:47:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:34,894 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:34,894 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:35,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:35,095 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-04-17 18:47:35,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:35,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318135396] [2020-04-17 18:47:35,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:35,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318135396] [2020-04-17 18:47:35,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157204304] [2020-04-17 18:47:35,207 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:35,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:35,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:35,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:35,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:35,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:35,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:35,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:35,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095768522] [2020-04-17 18:47:35,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:35,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:35,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:35,294 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-04-17 18:47:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:35,899 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-04-17 18:47:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:47:35,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:35,901 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:47:35,901 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:47:35,901 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:47:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:47:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-04-17 18:47:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:47:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-04-17 18:47:35,903 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-04-17 18:47:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:35,904 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-04-17 18:47:35,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-04-17 18:47:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:35,904 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:35,905 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:36,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:36,107 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-04-17 18:47:36,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:36,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609583098] [2020-04-17 18:47:36,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:36,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609583098] [2020-04-17 18:47:36,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920643776] [2020-04-17 18:47:36,281 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:36,332 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 18:47:36,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:36,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:36,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:36,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:36,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:36,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039617398] [2020-04-17 18:47:36,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:36,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:36,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:36,340 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-04-17 18:47:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:36,597 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 18:47:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:47:36,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:36,598 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:47:36,598 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:47:36,599 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:47:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:47:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-04-17 18:47:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-04-17 18:47:36,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-04-17 18:47:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:36,601 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-04-17 18:47:36,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-04-17 18:47:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:36,602 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:36,602 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:36,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:36,803 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-04-17 18:47:36,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:36,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848536684] [2020-04-17 18:47:36,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:36,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848536684] [2020-04-17 18:47:36,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539946845] [2020-04-17 18:47:36,948 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:36,997 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 18:47:36,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:36,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:36,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:37,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:37,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:37,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:37,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793160435] [2020-04-17 18:47:37,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:37,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:37,019 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-04-17 18:47:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:37,327 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-04-17 18:47:37,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:47:37,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:37,329 INFO L225 Difference]: With dead ends: 98 [2020-04-17 18:47:37,329 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 18:47:37,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 18:47:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-04-17 18:47:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 18:47:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-04-17 18:47:37,332 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-04-17 18:47:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:37,332 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-04-17 18:47:37,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-04-17 18:47:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:37,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:37,333 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:37,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:37,533 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-04-17 18:47:37,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:37,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616688642] [2020-04-17 18:47:37,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:37,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616688642] [2020-04-17 18:47:37,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598072009] [2020-04-17 18:47:37,699 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:37,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:37,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:37,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:37,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:37,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031884182] [2020-04-17 18:47:37,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:37,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:37,762 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-04-17 18:47:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:38,104 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 18:47:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:38,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:38,105 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:47:38,105 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:47:38,106 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:47:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-04-17 18:47:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-04-17 18:47:38,110 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-04-17 18:47:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:38,110 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-04-17 18:47:38,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-04-17 18:47:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:38,110 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:38,111 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:38,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:38,311 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-04-17 18:47:38,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:38,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454655151] [2020-04-17 18:47:38,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:38,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454655151] [2020-04-17 18:47:38,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073231073] [2020-04-17 18:47:38,457 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:38,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:38,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:38,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:38,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:38,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:38,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:38,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:38,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343792572] [2020-04-17 18:47:38,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:38,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:38,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:38,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:38,540 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-04-17 18:47:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:38,898 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-04-17 18:47:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:38,899 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:38,900 INFO L225 Difference]: With dead ends: 109 [2020-04-17 18:47:38,900 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 18:47:38,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 18:47:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 18:47:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-04-17 18:47:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-04-17 18:47:38,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-04-17 18:47:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:38,904 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-04-17 18:47:38,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-04-17 18:47:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:38,904 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:38,905 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:39,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:39,108 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-04-17 18:47:39,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:39,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731702781] [2020-04-17 18:47:39,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:39,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731702781] [2020-04-17 18:47:39,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465127425] [2020-04-17 18:47:39,239 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:39,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 18:47:39,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:39,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:39,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:39,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:39,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:39,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607368332] [2020-04-17 18:47:39,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:39,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:39,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:39,300 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-04-17 18:47:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:39,643 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-04-17 18:47:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:39,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:39,645 INFO L225 Difference]: With dead ends: 109 [2020-04-17 18:47:39,645 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 18:47:39,646 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:47:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 18:47:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-04-17 18:47:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 18:47:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-04-17 18:47:39,648 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-04-17 18:47:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:39,649 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-04-17 18:47:39,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-04-17 18:47:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:39,649 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:39,649 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:39,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:39,853 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-04-17 18:47:39,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:39,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77818636] [2020-04-17 18:47:39,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:40,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77818636] [2020-04-17 18:47:40,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769137149] [2020-04-17 18:47:40,024 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:40,119 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:40,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:40,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:40,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:40,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:40,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:40,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:40,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996224287] [2020-04-17 18:47:40,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:40,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:40,166 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-04-17 18:47:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:40,806 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-04-17 18:47:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:40,807 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:40,808 INFO L225 Difference]: With dead ends: 106 [2020-04-17 18:47:40,808 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:47:40,809 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:47:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:47:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 18:47:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:47:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-04-17 18:47:40,812 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-04-17 18:47:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:40,812 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-04-17 18:47:40,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-04-17 18:47:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:40,813 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:40,814 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:41,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:41,018 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-04-17 18:47:41,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:41,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463106704] [2020-04-17 18:47:41,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:41,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463106704] [2020-04-17 18:47:41,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462653849] [2020-04-17 18:47:41,244 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:41,332 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 18:47:41,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:41,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:41,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:41,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:41,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:41,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282388862] [2020-04-17 18:47:41,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:41,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:41,355 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-04-17 18:47:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:41,948 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-04-17 18:47:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:47:41,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:41,949 INFO L225 Difference]: With dead ends: 107 [2020-04-17 18:47:41,949 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:47:41,950 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:47:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:47:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 18:47:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 18:47:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-04-17 18:47:41,953 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-04-17 18:47:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:41,953 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-04-17 18:47:41,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-04-17 18:47:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:41,954 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:41,954 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:42,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:42,158 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-04-17 18:47:42,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:42,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963272940] [2020-04-17 18:47:42,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:42,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963272940] [2020-04-17 18:47:42,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664313941] [2020-04-17 18:47:42,291 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:42,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 18:47:42,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:42,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:42,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:42,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:42,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:42,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:42,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443641780] [2020-04-17 18:47:42,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:42,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:42,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:42,397 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-04-17 18:47:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:42,925 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-04-17 18:47:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:47:42,925 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:42,926 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:47:42,926 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:47:42,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:47:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:47:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-04-17 18:47:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:47:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-04-17 18:47:42,930 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-04-17 18:47:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:42,930 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-04-17 18:47:42,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-04-17 18:47:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:42,931 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:42,931 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:43,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:43,134 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-04-17 18:47:43,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:43,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180027543] [2020-04-17 18:47:43,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:43,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180027543] [2020-04-17 18:47:43,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653590610] [2020-04-17 18:47:43,283 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:43,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:43,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:43,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:43,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:43,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136560384] [2020-04-17 18:47:43,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:43,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:43,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:43,342 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-04-17 18:47:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:43,781 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-04-17 18:47:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:47:43,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:43,783 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:47:43,783 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 18:47:43,784 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:47:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 18:47:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-04-17 18:47:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:47:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 18:47:43,786 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-04-17 18:47:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:43,786 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 18:47:43,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 18:47:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:43,787 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:43,787 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:43,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:43,991 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-04-17 18:47:43,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:43,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036337333] [2020-04-17 18:47:43,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:44,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036337333] [2020-04-17 18:47:44,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132227892] [2020-04-17 18:47:44,111 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:44,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:44,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:44,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:44,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:44,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:44,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:44,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:44,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23008056] [2020-04-17 18:47:44,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:44,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:44,179 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-04-17 18:47:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:44,763 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-04-17 18:47:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:47:44,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:44,764 INFO L225 Difference]: With dead ends: 102 [2020-04-17 18:47:44,764 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:47:44,765 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:47:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:47:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-04-17 18:47:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:47:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 18:47:44,767 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-04-17 18:47:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:44,768 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 18:47:44,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 18:47:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:44,768 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:44,769 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:44,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:44,972 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:44,972 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-04-17 18:47:44,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:44,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412827606] [2020-04-17 18:47:44,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:45,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412827606] [2020-04-17 18:47:45,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200305644] [2020-04-17 18:47:45,087 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:45,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 18:47:45,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:45,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:47:45,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:45,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:45,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:45,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329999415] [2020-04-17 18:47:45,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:45,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:45,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:45,154 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-04-17 18:47:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:45,633 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-04-17 18:47:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:47:45,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:45,634 INFO L225 Difference]: With dead ends: 103 [2020-04-17 18:47:45,635 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 18:47:45,635 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:47:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 18:47:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-04-17 18:47:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:47:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-04-17 18:47:45,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-04-17 18:47:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:45,638 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-04-17 18:47:45,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-04-17 18:47:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:45,639 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:45,639 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:45,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:45,842 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:45,843 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-04-17 18:47:45,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:45,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729212420] [2020-04-17 18:47:45,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:45,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729212420] [2020-04-17 18:47:45,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174366344] [2020-04-17 18:47:45,984 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:46,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:46,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:46,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:46,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:46,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:46,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:46,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:46,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76618285] [2020-04-17 18:47:46,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:46,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:46,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:46,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:46,128 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-04-17 18:47:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:46,819 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-04-17 18:47:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:47:46,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:46,820 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:47:46,821 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 18:47:46,821 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:47:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 18:47:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-04-17 18:47:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:47:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 18:47:46,823 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-04-17 18:47:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:46,823 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 18:47:46,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 18:47:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:46,824 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:46,824 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:47,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:47,027 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-04-17 18:47:47,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:47,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584679367] [2020-04-17 18:47:47,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:47,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584679367] [2020-04-17 18:47:47,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311385847] [2020-04-17 18:47:47,163 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:47,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 18:47:47,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:47,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:47:47,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:47,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:47,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 18:47:47,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136011094] [2020-04-17 18:47:47,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:47:47,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:47:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:47:47,296 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-04-17 18:47:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:48,009 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 18:47:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:47:48,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:47:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:48,010 INFO L225 Difference]: With dead ends: 120 [2020-04-17 18:47:48,010 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 18:47:48,011 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:47:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 18:47:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-04-17 18:47:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:47:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-04-17 18:47:48,016 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-04-17 18:47:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:48,017 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-04-17 18:47:48,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:47:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-04-17 18:47:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:47:48,018 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:48,018 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:48,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:48,222 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:48,223 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-04-17 18:47:48,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:48,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724545626] [2020-04-17 18:47:48,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:48,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724545626] [2020-04-17 18:47:48,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805312946] [2020-04-17 18:47:48,500 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:48,584 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 18:47:48,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:48,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:48,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:48,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:48,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:47:48,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424414316] [2020-04-17 18:47:48,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:48,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:48,640 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-04-17 18:47:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:49,272 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-04-17 18:47:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:47:49,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:47:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:49,273 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:47:49,274 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:47:49,274 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:47:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:47:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-04-17 18:47:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 18:47:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-04-17 18:47:49,276 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-04-17 18:47:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:49,277 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-04-17 18:47:49,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-04-17 18:47:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:49,277 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:49,278 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:49,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:49,479 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:49,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:49,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-04-17 18:47:49,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:49,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204462409] [2020-04-17 18:47:49,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:49,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204462409] [2020-04-17 18:47:49,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688448181] [2020-04-17 18:47:49,638 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:49,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:49,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:49,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:49,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:47:49,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365097354] [2020-04-17 18:47:49,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:49,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:49,700 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-04-17 18:47:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:50,018 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-04-17 18:47:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:47:50,019 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:47:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:50,020 INFO L225 Difference]: With dead ends: 114 [2020-04-17 18:47:50,020 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 18:47:50,020 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:47:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 18:47:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-04-17 18:47:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:47:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:47:50,024 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 18:47:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:50,024 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:47:50,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:47:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:50,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:50,025 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:50,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:50,229 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-04-17 18:47:50,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:50,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818848866] [2020-04-17 18:47:50,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:50,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818848866] [2020-04-17 18:47:50,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994798879] [2020-04-17 18:47:50,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:50,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:50,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:50,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:50,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:50,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:50,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:50,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:47:50,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904244615] [2020-04-17 18:47:50,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:47:50,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:47:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:47:50,459 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 18:47:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:50,860 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-04-17 18:47:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:50,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:47:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:50,861 INFO L225 Difference]: With dead ends: 111 [2020-04-17 18:47:50,862 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:47:50,862 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:47:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:47:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-04-17 18:47:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:47:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:47:50,864 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 18:47:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:50,865 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:47:50,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:47:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:47:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:50,865 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:50,866 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:51,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:51,066 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-04-17 18:47:51,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:51,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823540109] [2020-04-17 18:47:51,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:51,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823540109] [2020-04-17 18:47:51,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064999200] [2020-04-17 18:47:51,215 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:51,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 18:47:51,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:51,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:51,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:51,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:51,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:47:51,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314484291] [2020-04-17 18:47:51,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:51,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:51,282 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 18:47:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:51,622 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 18:47:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:51,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:47:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:51,623 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:47:51,623 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 18:47:51,624 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 18:47:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 18:47:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-04-17 18:47:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:47:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:47:51,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 18:47:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:51,626 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:47:51,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:47:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:51,627 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:51,627 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:51,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:51,830 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-04-17 18:47:51,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:51,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492129582] [2020-04-17 18:47:51,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:51,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492129582] [2020-04-17 18:47:51,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403672037] [2020-04-17 18:47:51,979 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:52,027 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:52,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:52,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:52,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:52,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:52,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:52,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:47:52,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142858119] [2020-04-17 18:47:52,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:47:52,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:47:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:47:52,054 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 18:47:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:52,519 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-04-17 18:47:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:52,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:47:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:52,520 INFO L225 Difference]: With dead ends: 107 [2020-04-17 18:47:52,520 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:47:52,521 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:47:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:47:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-04-17 18:47:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:47:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:47:52,523 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 18:47:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:52,523 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:47:52,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:47:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:47:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:52,523 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:52,523 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:52,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:52,724 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-04-17 18:47:52,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:52,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963706310] [2020-04-17 18:47:52,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:52,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963706310] [2020-04-17 18:47:52,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101519333] [2020-04-17 18:47:52,876 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:52,928 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 18:47:52,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:52,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:52,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:52,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:52,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:47:52,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722150910] [2020-04-17 18:47:52,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:52,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:52,941 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 18:47:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:53,343 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 18:47:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:53,343 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:47:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:53,344 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:47:53,344 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:47:53,344 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:47:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:47:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-04-17 18:47:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:47:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:47:53,347 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 18:47:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:53,347 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:47:53,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:47:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:53,348 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:53,348 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:53,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:53,551 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:53,551 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-04-17 18:47:53,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:53,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731356423] [2020-04-17 18:47:53,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:53,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731356423] [2020-04-17 18:47:53,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91064822] [2020-04-17 18:47:53,708 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:53,760 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 18:47:53,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:53,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:53,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:53,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:53,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:53,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:47:53,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337748257] [2020-04-17 18:47:53,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:47:53,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:47:53,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:47:53,786 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 18:47:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:54,303 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-04-17 18:47:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:47:54,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:47:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:54,304 INFO L225 Difference]: With dead ends: 103 [2020-04-17 18:47:54,304 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 18:47:54,305 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:47:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 18:47:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-04-17 18:47:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:47:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:47:54,307 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 18:47:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:54,308 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:47:54,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:47:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:47:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:54,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:54,308 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:54,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:54,511 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:54,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-04-17 18:47:54,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:54,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548315306] [2020-04-17 18:47:54,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:54,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548315306] [2020-04-17 18:47:54,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003540843] [2020-04-17 18:47:54,645 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:54,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:54,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:54,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:54,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:47:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120793386] [2020-04-17 18:47:54,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:54,709 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 18:47:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:55,141 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-04-17 18:47:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:47:55,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:47:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:55,142 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:47:55,142 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 18:47:55,143 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:47:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 18:47:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-04-17 18:47:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:47:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:47:55,145 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 18:47:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:55,146 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:47:55,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:47:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:55,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:55,146 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:55,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:55,350 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-04-17 18:47:55,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:55,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353773003] [2020-04-17 18:47:55,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:55,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353773003] [2020-04-17 18:47:55,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980144744] [2020-04-17 18:47:55,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:55,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:55,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:55,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:55,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:55,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:55,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:55,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:47:55,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745821727] [2020-04-17 18:47:55,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:47:55,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:47:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:47:55,567 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 18:47:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:56,157 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 18:47:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:47:56,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:47:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:56,158 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:47:56,159 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:47:56,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:47:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:47:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-04-17 18:47:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:47:56,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:47:56,162 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 18:47:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:56,162 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:47:56,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:47:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:47:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:56,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:56,162 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:56,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:56,363 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-04-17 18:47:56,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:56,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607100487] [2020-04-17 18:47:56,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:56,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607100487] [2020-04-17 18:47:56,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050212983] [2020-04-17 18:47:56,489 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:56,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 18:47:56,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:56,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:56,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:56,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:56,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:47:56,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485893352] [2020-04-17 18:47:56,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:56,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:56,555 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 18:47:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:57,036 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-04-17 18:47:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:47:57,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:47:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:57,037 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:47:57,037 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:47:57,038 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:47:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:47:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-04-17 18:47:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:47:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:47:57,041 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 18:47:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:57,041 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:47:57,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:47:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:57,042 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:57,042 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:57,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:57,245 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-04-17 18:47:57,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:57,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978272924] [2020-04-17 18:47:57,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:57,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978272924] [2020-04-17 18:47:57,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223439312] [2020-04-17 18:47:57,416 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:57,464 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:57,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:57,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:57,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:57,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:57,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:47:57,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30735339] [2020-04-17 18:47:57,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:47:57,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:47:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:47:57,492 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 18:47:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:58,153 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 18:47:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:47:58,153 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:47:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:58,154 INFO L225 Difference]: With dead ends: 95 [2020-04-17 18:47:58,154 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 18:47:58,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:47:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 18:47:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-04-17 18:47:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:47:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:47:58,156 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 18:47:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:58,157 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:47:58,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:47:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:47:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:58,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:58,157 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:58,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:58,358 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-04-17 18:47:58,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:58,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062676823] [2020-04-17 18:47:58,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:58,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062676823] [2020-04-17 18:47:58,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095361338] [2020-04-17 18:47:58,533 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:58,604 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 18:47:58,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:58,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:47:58,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:58,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:58,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:47:58,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157529960] [2020-04-17 18:47:58,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:47:58,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:58,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:47:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:47:58,650 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 18:47:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:59,185 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 18:47:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:47:59,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:47:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:59,187 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:47:59,187 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 18:47:59,187 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:47:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 18:47:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-04-17 18:47:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:47:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:47:59,189 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 18:47:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:59,190 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:47:59,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:47:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:47:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:47:59,191 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:59,191 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:59,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:59,394 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:59,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-04-17 18:47:59,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:59,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428028471] [2020-04-17 18:47:59,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:59,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428028471] [2020-04-17 18:47:59,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659541939] [2020-04-17 18:47:59,516 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:59,568 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 18:47:59,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:59,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:47:59,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:59,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:59,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:47:59,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626128442] [2020-04-17 18:47:59,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:47:59,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:59,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:47:59,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:47:59,629 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 18:48:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:00,277 INFO L93 Difference]: Finished difference Result 89 states and 217 transitions. [2020-04-17 18:48:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:48:00,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:48:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:00,279 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:48:00,279 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:48:00,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1382, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:48:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:48:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-04-17 18:48:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:48:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:48:00,281 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 18:48:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:00,282 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:48:00,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:48:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:48:00,282 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:00,282 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:00,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:00,483 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-04-17 18:48:00,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:00,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452617477] [2020-04-17 18:48:00,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:00,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452617477] [2020-04-17 18:48:00,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704842977] [2020-04-17 18:48:00,673 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:00,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:48:00,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:00,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:00,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 18:48:00,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55170425] [2020-04-17 18:48:00,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:48:00,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:00,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:48:00,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:48:00,778 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 18:48:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:01,460 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 18:48:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:48:01,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 18:48:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:01,461 INFO L225 Difference]: With dead ends: 107 [2020-04-17 18:48:01,461 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:48:01,461 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:48:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:48:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-04-17 18:48:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 18:48:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-04-17 18:48:01,464 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-04-17 18:48:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:01,464 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-04-17 18:48:01,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:48:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-04-17 18:48:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:48:01,465 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:01,465 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:01,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:01,666 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-04-17 18:48:01,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:01,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160505801] [2020-04-17 18:48:01,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:01,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160505801] [2020-04-17 18:48:01,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198751506] [2020-04-17 18:48:01,783 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:01,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:01,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:01,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:01,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:01,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:01,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:48:01,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695526376] [2020-04-17 18:48:01,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:01,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:01,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:01,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:01,877 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-04-17 18:48:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:02,552 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-04-17 18:48:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:48:02,553 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:48:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:02,553 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:48:02,553 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:48:02,554 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 18:48:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:48:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 18:48:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:48:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-04-17 18:48:02,556 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-04-17 18:48:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:02,556 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-04-17 18:48:02,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-04-17 18:48:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:48:02,557 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:02,557 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:02,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:02,758 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-04-17 18:48:02,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:02,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403012452] [2020-04-17 18:48:02,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:02,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403012452] [2020-04-17 18:48:02,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814661551] [2020-04-17 18:48:02,879 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:02,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 18:48:02,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:02,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:48:02,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:02,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:02,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:02,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:48:02,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680654668] [2020-04-17 18:48:02,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:02,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:02,961 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-04-17 18:48:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:03,664 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-04-17 18:48:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:48:03,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 18:48:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:03,666 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:48:03,666 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 18:48:03,666 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:48:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 18:48:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-04-17 18:48:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:48:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 18:48:03,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-04-17 18:48:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:03,669 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 18:48:03,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 18:48:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:03,669 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:03,669 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:03,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:03,870 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-04-17 18:48:03,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:03,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850106792] [2020-04-17 18:48:03,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:03,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850106792] [2020-04-17 18:48:03,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753995767] [2020-04-17 18:48:03,996 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:04,046 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:04,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:04,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:04,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:04,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:04,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:04,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:04,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894394246] [2020-04-17 18:48:04,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:04,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:04,078 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-04-17 18:48:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:04,824 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-04-17 18:48:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:48:04,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:04,825 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:48:04,825 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 18:48:04,826 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:48:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 18:48:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-04-17 18:48:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:48:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-04-17 18:48:04,827 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-04-17 18:48:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:04,828 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-04-17 18:48:04,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-04-17 18:48:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:04,828 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:04,828 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:05,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:05,029 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-04-17 18:48:05,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:05,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219170249] [2020-04-17 18:48:05,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:05,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219170249] [2020-04-17 18:48:05,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240989613] [2020-04-17 18:48:05,209 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:05,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:48:05,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:05,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:05,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:05,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:05,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:05,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582814823] [2020-04-17 18:48:05,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:05,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:05,281 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-04-17 18:48:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:05,579 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-04-17 18:48:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:48:05,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:05,580 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:48:05,580 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 18:48:05,580 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:48:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 18:48:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-04-17 18:48:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:48:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-04-17 18:48:05,582 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-04-17 18:48:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:05,583 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-04-17 18:48:05,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-04-17 18:48:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:05,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:05,583 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:05,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:05,787 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-04-17 18:48:05,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:05,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132607572] [2020-04-17 18:48:05,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:05,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132607572] [2020-04-17 18:48:05,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149993300] [2020-04-17 18:48:05,978 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:06,023 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 18:48:06,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:06,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:06,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:06,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:06,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:06,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:06,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284476850] [2020-04-17 18:48:06,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:06,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:06,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:06,051 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-04-17 18:48:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:06,409 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-04-17 18:48:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:48:06,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:06,411 INFO L225 Difference]: With dead ends: 106 [2020-04-17 18:48:06,411 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:48:06,412 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:48:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:48:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 18:48:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:48:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-04-17 18:48:06,414 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-04-17 18:48:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:06,414 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-04-17 18:48:06,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-04-17 18:48:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:06,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:06,415 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:06,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:06,618 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-04-17 18:48:06,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:06,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659578433] [2020-04-17 18:48:06,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:06,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659578433] [2020-04-17 18:48:06,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511727690] [2020-04-17 18:48:06,789 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:06,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:06,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:06,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:06,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:06,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077606031] [2020-04-17 18:48:06,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:06,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:06,853 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-04-17 18:48:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:07,246 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-04-17 18:48:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:48:07,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:07,247 INFO L225 Difference]: With dead ends: 107 [2020-04-17 18:48:07,247 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:48:07,248 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:48:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:48:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 18:48:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 18:48:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-04-17 18:48:07,251 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-04-17 18:48:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:07,251 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-04-17 18:48:07,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-04-17 18:48:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:07,252 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:07,252 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:07,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:07,455 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:07,455 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-04-17 18:48:07,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:07,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309682096] [2020-04-17 18:48:07,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:07,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309682096] [2020-04-17 18:48:07,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29537322] [2020-04-17 18:48:07,627 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:07,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:07,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:07,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:07,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:07,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:07,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:07,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:07,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414063911] [2020-04-17 18:48:07,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:07,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:07,702 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-04-17 18:48:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:08,152 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-04-17 18:48:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:48:08,152 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:08,153 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:48:08,153 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:48:08,153 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:48:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:48:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-04-17 18:48:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:48:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-04-17 18:48:08,156 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-04-17 18:48:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:08,156 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-04-17 18:48:08,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-04-17 18:48:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:08,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:08,157 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:08,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:08,358 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-04-17 18:48:08,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:08,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102259534] [2020-04-17 18:48:08,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:08,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102259534] [2020-04-17 18:48:08,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920442692] [2020-04-17 18:48:08,513 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:08,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 18:48:08,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:08,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:08,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:08,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:08,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:08,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807091449] [2020-04-17 18:48:08,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:08,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:08,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:08,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:08,576 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-04-17 18:48:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:09,014 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-04-17 18:48:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:48:09,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:09,015 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:48:09,016 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:48:09,016 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:48:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:48:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-04-17 18:48:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:48:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-04-17 18:48:09,019 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-04-17 18:48:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:09,019 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-04-17 18:48:09,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-04-17 18:48:09,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:09,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:09,020 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:09,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:09,222 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-04-17 18:48:09,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:09,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187201244] [2020-04-17 18:48:09,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:09,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187201244] [2020-04-17 18:48:09,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619922254] [2020-04-17 18:48:09,380 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:09,432 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:09,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:09,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:09,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:09,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:09,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:09,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:09,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602814965] [2020-04-17 18:48:09,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:09,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:09,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:09,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:09,457 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-04-17 18:48:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:09,962 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-04-17 18:48:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:48:09,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:09,963 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:48:09,963 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 18:48:09,964 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:48:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 18:48:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-04-17 18:48:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:48:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-04-17 18:48:09,966 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-04-17 18:48:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:09,966 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-04-17 18:48:09,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-04-17 18:48:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:09,967 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:09,967 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:10,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:10,168 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-04-17 18:48:10,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:10,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840714097] [2020-04-17 18:48:10,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:10,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840714097] [2020-04-17 18:48:10,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464343265] [2020-04-17 18:48:10,330 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:10,383 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:48:10,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:10,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:10,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:10,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:10,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:10,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521017440] [2020-04-17 18:48:10,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:10,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:10,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:10,426 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-04-17 18:48:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:11,038 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-04-17 18:48:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:48:11,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:11,039 INFO L225 Difference]: With dead ends: 117 [2020-04-17 18:48:11,039 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:48:11,039 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:48:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:48:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-04-17 18:48:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:48:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-04-17 18:48:11,041 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-04-17 18:48:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:11,042 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-04-17 18:48:11,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-04-17 18:48:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:11,042 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:11,042 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:11,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:11,246 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-04-17 18:48:11,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:11,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921841683] [2020-04-17 18:48:11,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:11,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921841683] [2020-04-17 18:48:11,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687400284] [2020-04-17 18:48:11,399 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:11,448 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 18:48:11,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:11,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:11,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:11,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:11,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:11,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:11,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111100295] [2020-04-17 18:48:11,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:11,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:11,498 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-04-17 18:48:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:12,048 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-04-17 18:48:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:48:12,049 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:12,050 INFO L225 Difference]: With dead ends: 114 [2020-04-17 18:48:12,050 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 18:48:12,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:48:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 18:48:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-04-17 18:48:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:48:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-04-17 18:48:12,053 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-04-17 18:48:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:12,055 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-04-17 18:48:12,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-04-17 18:48:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:12,055 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:12,055 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:12,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:12,256 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-04-17 18:48:12,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:12,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971482125] [2020-04-17 18:48:12,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:12,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971482125] [2020-04-17 18:48:12,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725058231] [2020-04-17 18:48:12,396 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:12,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:12,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:12,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:12,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:12,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944932278] [2020-04-17 18:48:12,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:12,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:12,462 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-04-17 18:48:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:12,969 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-04-17 18:48:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:48:12,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:12,970 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:48:12,970 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 18:48:12,971 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:48:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 18:48:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-04-17 18:48:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 18:48:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-04-17 18:48:12,973 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-04-17 18:48:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:12,974 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-04-17 18:48:12,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-04-17 18:48:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:12,974 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:12,974 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:13,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:13,175 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-04-17 18:48:13,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:13,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795134376] [2020-04-17 18:48:13,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:13,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795134376] [2020-04-17 18:48:13,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969609970] [2020-04-17 18:48:13,320 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:13,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:13,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:13,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:13,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:13,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:13,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:13,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:13,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618663374] [2020-04-17 18:48:13,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:13,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:13,400 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-04-17 18:48:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:14,047 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-04-17 18:48:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:48:14,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:14,048 INFO L225 Difference]: With dead ends: 112 [2020-04-17 18:48:14,048 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 18:48:14,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:48:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 18:48:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-04-17 18:48:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 18:48:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-04-17 18:48:14,051 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-04-17 18:48:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:14,051 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-04-17 18:48:14,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-04-17 18:48:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:14,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:14,052 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:14,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:14,252 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-04-17 18:48:14,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:14,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052367554] [2020-04-17 18:48:14,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:14,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052367554] [2020-04-17 18:48:14,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656444570] [2020-04-17 18:48:14,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:14,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 18:48:14,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:14,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:14,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:14,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:14,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:14,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9724103] [2020-04-17 18:48:14,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:14,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:14,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:14,460 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-04-17 18:48:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:15,001 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-04-17 18:48:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:48:15,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:15,002 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:48:15,002 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 18:48:15,003 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 18:48:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 18:48:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-04-17 18:48:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:48:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 18:48:15,005 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-04-17 18:48:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:15,006 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 18:48:15,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 18:48:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:15,006 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:15,007 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:15,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:15,207 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-04-17 18:48:15,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:15,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590993842] [2020-04-17 18:48:15,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:15,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590993842] [2020-04-17 18:48:15,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16829556] [2020-04-17 18:48:15,342 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:15,391 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:15,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:15,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:15,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:15,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:15,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:15,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:15,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41975610] [2020-04-17 18:48:15,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:15,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:15,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:15,419 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-04-17 18:48:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:16,118 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-04-17 18:48:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:48:16,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:16,119 INFO L225 Difference]: With dead ends: 110 [2020-04-17 18:48:16,119 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 18:48:16,120 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:48:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 18:48:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-04-17 18:48:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:48:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 18:48:16,122 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-04-17 18:48:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:16,122 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 18:48:16,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 18:48:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:16,123 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:16,123 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:16,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:16,323 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-04-17 18:48:16,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:16,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720775644] [2020-04-17 18:48:16,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:16,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720775644] [2020-04-17 18:48:16,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359168934] [2020-04-17 18:48:16,463 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:16,518 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:48:16,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:16,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:16,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:16,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:16,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:16,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179149011] [2020-04-17 18:48:16,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:16,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:16,548 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-04-17 18:48:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:17,394 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-04-17 18:48:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 18:48:17,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:17,395 INFO L225 Difference]: With dead ends: 111 [2020-04-17 18:48:17,395 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:48:17,396 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:48:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:48:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-04-17 18:48:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:48:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-04-17 18:48:17,399 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-04-17 18:48:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:17,400 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-04-17 18:48:17,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-04-17 18:48:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:17,400 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:17,401 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:17,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:17,605 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-04-17 18:48:17,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:17,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6516778] [2020-04-17 18:48:17,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:17,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6516778] [2020-04-17 18:48:17,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811523878] [2020-04-17 18:48:17,764 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:17,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 18:48:17,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:17,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:17,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:17,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:17,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:17,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:17,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190442709] [2020-04-17 18:48:17,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:17,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:17,869 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-04-17 18:48:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:18,632 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-04-17 18:48:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:48:18,633 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:18,633 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:48:18,633 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 18:48:18,634 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:48:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 18:48:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-04-17 18:48:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:48:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 18:48:18,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-04-17 18:48:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:18,637 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 18:48:18,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 18:48:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:18,638 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:18,638 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:18,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:18,841 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-04-17 18:48:18,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:18,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587068815] [2020-04-17 18:48:18,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:19,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587068815] [2020-04-17 18:48:19,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728595730] [2020-04-17 18:48:19,011 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:19,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:48:19,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:19,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:19,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 18:48:19,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874427429] [2020-04-17 18:48:19,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:48:19,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:19,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:48:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:48:19,078 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-04-17 18:48:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:19,691 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-04-17 18:48:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:48:19,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 18:48:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:19,692 INFO L225 Difference]: With dead ends: 128 [2020-04-17 18:48:19,693 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 18:48:19,693 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:48:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 18:48:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-04-17 18:48:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:48:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-04-17 18:48:19,695 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-04-17 18:48:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:19,695 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-04-17 18:48:19,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:48:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-04-17 18:48:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:48:19,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:19,695 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:19,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:19,896 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-04-17 18:48:19,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:19,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830652535] [2020-04-17 18:48:19,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:20,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830652535] [2020-04-17 18:48:20,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166626392] [2020-04-17 18:48:20,036 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:20,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:20,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:20,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:20,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:20,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:20,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:48:20,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673059538] [2020-04-17 18:48:20,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:20,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:20,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:20,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:20,121 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-04-17 18:48:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:20,884 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-04-17 18:48:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:48:20,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:48:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:20,886 INFO L225 Difference]: With dead ends: 109 [2020-04-17 18:48:20,886 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:48:20,886 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:48:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:48:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-04-17 18:48:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:48:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-04-17 18:48:20,888 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-04-17 18:48:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:20,889 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-04-17 18:48:20,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-04-17 18:48:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:20,889 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:20,890 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:21,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:21,090 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-04-17 18:48:21,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:21,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9537668] [2020-04-17 18:48:21,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:21,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9537668] [2020-04-17 18:48:21,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227405778] [2020-04-17 18:48:21,299 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:21,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 18:48:21,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:21,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:21,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:21,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:21,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:21,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078648891] [2020-04-17 18:48:21,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:21,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:21,368 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-04-17 18:48:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:21,711 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-04-17 18:48:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:48:21,711 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:21,712 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:48:21,712 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:48:21,712 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:48:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:48:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-04-17 18:48:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:21,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:21,715 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:21,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:21,716 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:21,716 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:21,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:21,916 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-04-17 18:48:21,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:21,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113595681] [2020-04-17 18:48:21,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:22,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113595681] [2020-04-17 18:48:22,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016019435] [2020-04-17 18:48:22,126 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:22,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:22,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:22,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:22,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:22,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:22,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:22,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:22,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673946281] [2020-04-17 18:48:22,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:22,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:22,204 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:22,595 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 18:48:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:48:22,596 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:22,596 INFO L225 Difference]: With dead ends: 121 [2020-04-17 18:48:22,597 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 18:48:22,597 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:48:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 18:48:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-04-17 18:48:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:22,599 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:22,600 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:22,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:22,600 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:22,600 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:22,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:22,804 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:22,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-04-17 18:48:22,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:22,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853610854] [2020-04-17 18:48:22,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:22,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853610854] [2020-04-17 18:48:22,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379583408] [2020-04-17 18:48:22,988 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:23,044 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:48:23,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:23,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:23,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:23,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:23,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:23,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310638551] [2020-04-17 18:48:23,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:23,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:23,061 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:23,474 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 18:48:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:48:23,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:23,475 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:48:23,475 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:48:23,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:48:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:48:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-04-17 18:48:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:23,478 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:23,478 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:23,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:23,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:23,479 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:23,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:23,680 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-04-17 18:48:23,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:23,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687579249] [2020-04-17 18:48:23,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:23,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687579249] [2020-04-17 18:48:23,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59620352] [2020-04-17 18:48:23,887 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:23,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 18:48:23,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:23,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:23,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:23,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:23,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:23,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508197401] [2020-04-17 18:48:23,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:23,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:23,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:23,970 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:24,477 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-04-17 18:48:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:48:24,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:24,478 INFO L225 Difference]: With dead ends: 117 [2020-04-17 18:48:24,478 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:48:24,478 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:48:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:48:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-04-17 18:48:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:24,481 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:24,482 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:24,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:24,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:24,482 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:24,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:24,684 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-04-17 18:48:24,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:24,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155301064] [2020-04-17 18:48:24,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:24,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155301064] [2020-04-17 18:48:24,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599081508] [2020-04-17 18:48:24,857 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:24,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:24,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:24,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:24,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:24,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496354299] [2020-04-17 18:48:24,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:24,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:24,917 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:25,380 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-04-17 18:48:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:48:25,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:25,381 INFO L225 Difference]: With dead ends: 114 [2020-04-17 18:48:25,381 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 18:48:25,381 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:48:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 18:48:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-04-17 18:48:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:25,384 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:25,384 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:25,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:25,384 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:25,384 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:25,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:25,588 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:25,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-04-17 18:48:25,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:25,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073516363] [2020-04-17 18:48:25,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:25,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073516363] [2020-04-17 18:48:25,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55883058] [2020-04-17 18:48:25,754 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:25,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:25,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:25,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:25,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:25,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:25,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:25,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:25,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209782945] [2020-04-17 18:48:25,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:25,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:25,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:25,830 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:26,380 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-04-17 18:48:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:48:26,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:26,382 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:48:26,382 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 18:48:26,382 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:48:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 18:48:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-04-17 18:48:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:26,384 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:26,385 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:26,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:26,386 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:26,386 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:26,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:26,589 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-04-17 18:48:26,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:26,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110532863] [2020-04-17 18:48:26,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:26,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110532863] [2020-04-17 18:48:26,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585227393] [2020-04-17 18:48:26,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:26,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 18:48:26,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:26,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:26,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:26,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:26,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:26,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662864817] [2020-04-17 18:48:26,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:26,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:26,825 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:27,339 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-04-17 18:48:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:48:27,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:27,340 INFO L225 Difference]: With dead ends: 110 [2020-04-17 18:48:27,341 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 18:48:27,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:48:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 18:48:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-04-17 18:48:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:27,344 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:27,344 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:27,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:27,345 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:27,345 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:27,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:27,548 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-04-17 18:48:27,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:27,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833823624] [2020-04-17 18:48:27,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:27,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833823624] [2020-04-17 18:48:27,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368246019] [2020-04-17 18:48:27,707 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:27,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:27,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:27,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:27,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:27,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:27,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:27,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:27,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941816554] [2020-04-17 18:48:27,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:27,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:27,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:27,804 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:28,454 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-04-17 18:48:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:48:28,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:28,455 INFO L225 Difference]: With dead ends: 109 [2020-04-17 18:48:28,456 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 18:48:28,456 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 18:48:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 18:48:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-04-17 18:48:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:28,458 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:28,458 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:28,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:28,458 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:28,458 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:28,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:28,662 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-04-17 18:48:28,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:28,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77425461] [2020-04-17 18:48:28,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:28,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77425461] [2020-04-17 18:48:28,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504153985] [2020-04-17 18:48:28,812 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:28,868 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:48:28,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:28,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:28,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:28,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:28,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:28,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040128255] [2020-04-17 18:48:28,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:28,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:28,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:28,884 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:29,421 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-04-17 18:48:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:48:29,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:29,422 INFO L225 Difference]: With dead ends: 106 [2020-04-17 18:48:29,422 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:48:29,423 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:48:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:48:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-04-17 18:48:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:29,425 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:29,425 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:29,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:29,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:29,426 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:29,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:29,627 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-04-17 18:48:29,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:29,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538386052] [2020-04-17 18:48:29,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:29,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538386052] [2020-04-17 18:48:29,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995089892] [2020-04-17 18:48:29,813 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:29,869 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 18:48:29,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:29,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:29,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:29,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:29,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:29,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:29,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500811077] [2020-04-17 18:48:29,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:29,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:29,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:29,898 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:30,630 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-04-17 18:48:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:48:30,631 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:30,632 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:48:30,632 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 18:48:30,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:48:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 18:48:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-04-17 18:48:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:30,634 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:30,635 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:30,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:30,635 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:30,635 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:30,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:30,836 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-04-17 18:48:30,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:30,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872862222] [2020-04-17 18:48:30,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:30,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872862222] [2020-04-17 18:48:30,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16845482] [2020-04-17 18:48:30,988 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:31,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:31,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:31,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:31,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:31,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252236142] [2020-04-17 18:48:31,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:31,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:31,050 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:31,651 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-04-17 18:48:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:48:31,652 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:31,653 INFO L225 Difference]: With dead ends: 102 [2020-04-17 18:48:31,653 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:48:31,653 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:48:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:48:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-04-17 18:48:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:31,656 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:31,656 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:31,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:31,656 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:31,656 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:31,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:31,857 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-04-17 18:48:31,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:31,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359158036] [2020-04-17 18:48:31,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:32,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359158036] [2020-04-17 18:48:32,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462693557] [2020-04-17 18:48:32,013 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:32,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:32,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:32,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:32,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:32,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:32,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:32,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:32,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076327114] [2020-04-17 18:48:32,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:32,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:32,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:32,103 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:32,898 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 18:48:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:48:32,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:32,899 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:48:32,899 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 18:48:32,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:48:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 18:48:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-04-17 18:48:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:32,902 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:32,903 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:32,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:32,903 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:32,903 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:33,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:33,105 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-04-17 18:48:33,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:33,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087050996] [2020-04-17 18:48:33,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:33,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087050996] [2020-04-17 18:48:33,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646779534] [2020-04-17 18:48:33,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:33,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 18:48:33,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:33,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:33,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:33,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:33,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:33,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330535488] [2020-04-17 18:48:33,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:33,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:33,351 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:33,995 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-04-17 18:48:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 18:48:33,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:33,996 INFO L225 Difference]: With dead ends: 98 [2020-04-17 18:48:33,997 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 18:48:33,997 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:48:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 18:48:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-04-17 18:48:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:33,999 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 18:48:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:34,000 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:34,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:34,000 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:34,001 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:34,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:34,201 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-04-17 18:48:34,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:34,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374651830] [2020-04-17 18:48:34,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:34,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374651830] [2020-04-17 18:48:34,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768648784] [2020-04-17 18:48:34,345 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:34,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:34,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:34,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:34,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:34,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:34,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:34,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:34,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505500661] [2020-04-17 18:48:34,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:34,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:34,475 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 18:48:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:35,342 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-04-17 18:48:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:48:35,343 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:35,343 INFO L225 Difference]: With dead ends: 97 [2020-04-17 18:48:35,344 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 18:48:35,344 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:48:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 18:48:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-04-17 18:48:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:35,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 18:48:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:35,347 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:35,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:35,347 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:35,347 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:35,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:35,548 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-04-17 18:48:35,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:35,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016246085] [2020-04-17 18:48:35,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:35,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016246085] [2020-04-17 18:48:35,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135849721] [2020-04-17 18:48:35,691 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:35,746 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:48:35,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:35,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:35,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:35,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:35,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 18:48:35,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241446116] [2020-04-17 18:48:35,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:48:35,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:48:35,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:48:35,760 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 18:48:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:36,461 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 18:48:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:48:36,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 18:48:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:36,462 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:48:36,462 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 18:48:36,463 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:48:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 18:48:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-04-17 18:48:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 18:48:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-04-17 18:48:36,466 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-04-17 18:48:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:36,466 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-04-17 18:48:36,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:48:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-04-17 18:48:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:36,467 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:36,467 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:36,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:36,670 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-04-17 18:48:36,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:36,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460682032] [2020-04-17 18:48:36,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:36,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460682032] [2020-04-17 18:48:36,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201460912] [2020-04-17 18:48:36,823 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:36,876 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 18:48:36,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:36,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:36,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:36,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:36,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:36,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040821534] [2020-04-17 18:48:36,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:36,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:36,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:36,909 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-04-17 18:48:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:37,698 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-04-17 18:48:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:48:37,699 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:37,699 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:48:37,699 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 18:48:37,700 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:48:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 18:48:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-04-17 18:48:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 18:48:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-04-17 18:48:37,702 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-04-17 18:48:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:37,702 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-04-17 18:48:37,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-04-17 18:48:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:48:37,703 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:37,703 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:37,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:37,904 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:37,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-04-17 18:48:37,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:37,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521022330] [2020-04-17 18:48:37,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:38,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521022330] [2020-04-17 18:48:38,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599475069] [2020-04-17 18:48:38,045 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:38,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:48:38,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:38,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:38,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:38,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:48:38,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457927958] [2020-04-17 18:48:38,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:38,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:38,124 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-04-17 18:48:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:38,942 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 18:48:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:48:38,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 18:48:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:38,943 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:48:38,944 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 18:48:38,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 18:48:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 18:48:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-04-17 18:48:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:48:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 18:48:38,946 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-04-17 18:48:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:38,946 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 18:48:38,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 18:48:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:38,947 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:38,947 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:39,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:39,148 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-04-17 18:48:39,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:39,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383173108] [2020-04-17 18:48:39,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:39,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383173108] [2020-04-17 18:48:39,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479989613] [2020-04-17 18:48:39,307 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:39,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:39,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:39,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:39,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:39,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:39,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:39,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:39,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125604032] [2020-04-17 18:48:39,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:39,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:39,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:39,388 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-04-17 18:48:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:40,265 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-04-17 18:48:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:48:40,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:40,266 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:48:40,266 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 18:48:40,267 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 18:48:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 18:48:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 18:48:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:48:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-04-17 18:48:40,269 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-04-17 18:48:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:40,269 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-04-17 18:48:40,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-04-17 18:48:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:40,269 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:40,269 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:40,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:40,470 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-04-17 18:48:40,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:40,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145394403] [2020-04-17 18:48:40,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145394403] [2020-04-17 18:48:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579392863] [2020-04-17 18:48:40,690 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:40,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:48:40,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:40,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:40,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:40,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:40,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:40,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426052766] [2020-04-17 18:48:40,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:40,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:40,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:40,755 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-04-17 18:48:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:41,137 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-04-17 18:48:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:48:41,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:41,138 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:48:41,138 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:48:41,138 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:48:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:48:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-04-17 18:48:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:48:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-04-17 18:48:41,141 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-04-17 18:48:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:41,141 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-04-17 18:48:41,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-04-17 18:48:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:41,141 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:41,141 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:41,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:41,342 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-04-17 18:48:41,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:41,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669197258] [2020-04-17 18:48:41,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:41,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669197258] [2020-04-17 18:48:41,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976746920] [2020-04-17 18:48:41,556 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:41,607 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:41,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:41,608 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:41,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:41,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:41,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:41,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:41,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535730669] [2020-04-17 18:48:41,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:41,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:41,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:41,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:41,631 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-04-17 18:48:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:42,015 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-04-17 18:48:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:48:42,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:42,016 INFO L225 Difference]: With dead ends: 114 [2020-04-17 18:48:42,017 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 18:48:42,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:48:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 18:48:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-04-17 18:48:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 18:48:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-04-17 18:48:42,019 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-04-17 18:48:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:42,020 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-04-17 18:48:42,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-04-17 18:48:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:42,020 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:42,020 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:42,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:42,221 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-04-17 18:48:42,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:42,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597223897] [2020-04-17 18:48:42,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:42,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597223897] [2020-04-17 18:48:42,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641701706] [2020-04-17 18:48:42,433 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:42,489 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:48:42,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:42,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:42,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:42,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:42,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:42,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281783880] [2020-04-17 18:48:42,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:42,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:42,500 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-04-17 18:48:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:42,910 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-04-17 18:48:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:48:42,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:42,911 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:48:42,911 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 18:48:42,912 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:48:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 18:48:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-04-17 18:48:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:48:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-04-17 18:48:42,914 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-04-17 18:48:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:42,914 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-04-17 18:48:42,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-04-17 18:48:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:42,914 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:42,914 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:43,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:43,115 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:43,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-04-17 18:48:43,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:43,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114730059] [2020-04-17 18:48:43,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:43,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114730059] [2020-04-17 18:48:43,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961623663] [2020-04-17 18:48:43,325 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:43,380 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:48:43,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:43,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:43,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:43,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:43,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:43,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:43,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502284663] [2020-04-17 18:48:43,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:43,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:43,407 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-04-17 18:48:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:43,881 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-04-17 18:48:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:48:43,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:43,882 INFO L225 Difference]: With dead ends: 129 [2020-04-17 18:48:43,883 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 18:48:43,883 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:48:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 18:48:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-04-17 18:48:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:48:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-04-17 18:48:43,886 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-04-17 18:48:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:43,886 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-04-17 18:48:43,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-04-17 18:48:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:43,887 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:43,887 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:44,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:44,090 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:44,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:44,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-04-17 18:48:44,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:44,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126220109] [2020-04-17 18:48:44,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:44,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126220109] [2020-04-17 18:48:44,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22128225] [2020-04-17 18:48:44,288 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:44,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:44,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:44,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:44,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:44,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689840861] [2020-04-17 18:48:44,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:44,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:44,349 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-04-17 18:48:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:44,852 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-04-17 18:48:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:48:44,852 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:44,853 INFO L225 Difference]: With dead ends: 129 [2020-04-17 18:48:44,853 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 18:48:44,853 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:48:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 18:48:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-04-17 18:48:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 18:48:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-04-17 18:48:44,856 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-04-17 18:48:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:44,856 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-04-17 18:48:44,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-04-17 18:48:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:44,857 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:44,857 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:45,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:45,057 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-04-17 18:48:45,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:45,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107527372] [2020-04-17 18:48:45,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:45,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107527372] [2020-04-17 18:48:45,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760774063] [2020-04-17 18:48:45,254 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:45,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:45,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:45,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:45,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:45,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:45,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:45,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:45,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722294141] [2020-04-17 18:48:45,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:45,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:45,328 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-04-17 18:48:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:45,893 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-04-17 18:48:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:48:45,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:45,894 INFO L225 Difference]: With dead ends: 126 [2020-04-17 18:48:45,895 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:48:45,895 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:48:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:48:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-04-17 18:48:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 18:48:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-04-17 18:48:45,898 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-04-17 18:48:45,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:45,898 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-04-17 18:48:45,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-04-17 18:48:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:45,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:45,899 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:46,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:46,102 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-04-17 18:48:46,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:46,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258197305] [2020-04-17 18:48:46,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:46,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258197305] [2020-04-17 18:48:46,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274656043] [2020-04-17 18:48:46,280 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:46,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:48:46,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:46,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:46,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:46,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:46,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:46,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660122255] [2020-04-17 18:48:46,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:46,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:46,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:46,363 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-04-17 18:48:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:46,905 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-04-17 18:48:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:48:46,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:46,907 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:48:46,907 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:48:46,907 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 18:48:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:48:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-04-17 18:48:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:48:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-04-17 18:48:46,910 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-04-17 18:48:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:46,910 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-04-17 18:48:46,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-04-17 18:48:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:46,910 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:46,910 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:47,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:47,111 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-04-17 18:48:47,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:47,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007113014] [2020-04-17 18:48:47,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:47,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007113014] [2020-04-17 18:48:47,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351077116] [2020-04-17 18:48:47,290 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:47,342 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:47,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:47,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:47,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:47,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:47,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:47,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:47,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538493629] [2020-04-17 18:48:47,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:47,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:47,372 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-04-17 18:48:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:48,021 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-04-17 18:48:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:48:48,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:48,022 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:48:48,022 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:48:48,023 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:48:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:48:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-04-17 18:48:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:48:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-04-17 18:48:48,025 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-04-17 18:48:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:48,025 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-04-17 18:48:48,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-04-17 18:48:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:48,026 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:48,026 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:48,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:48,226 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-04-17 18:48:48,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:48,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388948638] [2020-04-17 18:48:48,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:48,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388948638] [2020-04-17 18:48:48,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999851326] [2020-04-17 18:48:48,397 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:48,453 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:48:48,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:48,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:48,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:48,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:48,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:48,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381621579] [2020-04-17 18:48:48,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:48,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:48,483 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-04-17 18:48:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:49,070 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-04-17 18:48:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:48:49,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:49,071 INFO L225 Difference]: With dead ends: 125 [2020-04-17 18:48:49,071 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 18:48:49,072 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:48:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 18:48:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-04-17 18:48:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:48:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-04-17 18:48:49,074 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-04-17 18:48:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:49,074 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-04-17 18:48:49,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-04-17 18:48:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:49,075 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:49,075 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:49,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:49,276 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-04-17 18:48:49,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:49,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250547135] [2020-04-17 18:48:49,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:49,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250547135] [2020-04-17 18:48:49,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890087245] [2020-04-17 18:48:49,439 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:49,497 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:48:49,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:49,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:49,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:49,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:49,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:49,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:49,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727267870] [2020-04-17 18:48:49,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:49,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:49,526 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-04-17 18:48:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:50,210 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-04-17 18:48:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:48:50,211 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:50,211 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:48:50,212 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:48:50,212 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:48:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:48:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-04-17 18:48:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:48:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-04-17 18:48:50,214 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-04-17 18:48:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:50,215 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-04-17 18:48:50,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-04-17 18:48:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:50,215 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:50,215 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:50,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:50,416 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-04-17 18:48:50,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:50,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159175270] [2020-04-17 18:48:50,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:50,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159175270] [2020-04-17 18:48:50,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815306260] [2020-04-17 18:48:50,578 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:50,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:50,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:50,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:50,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:50,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817075109] [2020-04-17 18:48:50,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:50,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:50,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:50,649 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-04-17 18:48:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:51,250 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 18:48:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 18:48:51,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:51,251 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:48:51,251 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:48:51,252 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:48:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:48:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-04-17 18:48:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:48:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-04-17 18:48:51,254 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-04-17 18:48:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:51,254 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-04-17 18:48:51,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-04-17 18:48:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:51,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:51,255 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:51,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:51,455 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:51,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-04-17 18:48:51,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:51,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231004400] [2020-04-17 18:48:51,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:51,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231004400] [2020-04-17 18:48:51,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818455548] [2020-04-17 18:48:51,636 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:51,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:51,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:51,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:51,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:51,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:51,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:51,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:51,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226021542] [2020-04-17 18:48:51,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:51,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:51,715 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-04-17 18:48:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:52,471 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-04-17 18:48:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:48:52,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:52,472 INFO L225 Difference]: With dead ends: 120 [2020-04-17 18:48:52,472 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 18:48:52,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:48:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 18:48:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-04-17 18:48:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 18:48:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-04-17 18:48:52,475 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-04-17 18:48:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:52,475 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-04-17 18:48:52,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-04-17 18:48:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:52,476 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:52,476 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:52,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:52,676 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:52,677 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-04-17 18:48:52,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:52,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981930880] [2020-04-17 18:48:52,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:52,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981930880] [2020-04-17 18:48:52,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108791854] [2020-04-17 18:48:52,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:52,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:48:52,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:52,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:52,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:52,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:52,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:52,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178969111] [2020-04-17 18:48:52,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:52,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:52,919 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-04-17 18:48:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:53,568 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 18:48:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:48:53,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:53,569 INFO L225 Difference]: With dead ends: 121 [2020-04-17 18:48:53,569 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 18:48:53,570 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:48:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 18:48:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-04-17 18:48:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:48:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 18:48:53,572 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-04-17 18:48:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:53,572 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 18:48:53,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 18:48:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:53,572 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:53,572 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:53,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:53,773 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-04-17 18:48:53,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:53,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377041462] [2020-04-17 18:48:53,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:53,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377041462] [2020-04-17 18:48:53,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883778455] [2020-04-17 18:48:53,938 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:53,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:48:53,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:53,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:53,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:54,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:54,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:54,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:54,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118838868] [2020-04-17 18:48:54,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:54,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:54,017 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-04-17 18:48:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:54,828 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 18:48:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:48:54,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:54,829 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:48:54,829 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:48:54,830 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 18:48:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:48:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-04-17 18:48:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:48:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 18:48:54,832 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-04-17 18:48:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:54,832 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 18:48:54,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 18:48:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:54,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:54,833 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:55,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:55,033 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-04-17 18:48:55,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:55,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76424976] [2020-04-17 18:48:55,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:55,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76424976] [2020-04-17 18:48:55,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171138881] [2020-04-17 18:48:55,182 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:55,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:48:55,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:55,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:55,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:55,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:55,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:55,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011949537] [2020-04-17 18:48:55,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:55,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:55,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:55,250 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-04-17 18:48:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:55,952 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-04-17 18:48:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 18:48:55,952 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:55,953 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:48:55,953 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:48:55,954 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 18:48:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:48:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-04-17 18:48:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 18:48:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-04-17 18:48:55,957 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-04-17 18:48:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:55,957 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-04-17 18:48:55,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-04-17 18:48:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:55,957 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:55,958 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:56,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:56,161 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-04-17 18:48:56,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:56,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616524795] [2020-04-17 18:48:56,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:56,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616524795] [2020-04-17 18:48:56,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292632656] [2020-04-17 18:48:56,314 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:56,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:48:56,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:56,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:56,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:56,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:48:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:56,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:56,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:56,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480471754] [2020-04-17 18:48:56,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:56,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:56,396 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-04-17 18:48:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:57,275 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-04-17 18:48:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 18:48:57,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:57,276 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:48:57,276 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 18:48:57,276 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 18:48:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 18:48:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-04-17 18:48:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:48:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 18:48:57,279 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-04-17 18:48:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:57,279 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 18:48:57,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 18:48:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:57,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:57,280 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:57,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:57,480 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-04-17 18:48:57,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:57,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423010157] [2020-04-17 18:48:57,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:57,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423010157] [2020-04-17 18:48:57,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054471870] [2020-04-17 18:48:57,636 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:57,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:48:57,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:57,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:57,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 18:48:57,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479391004] [2020-04-17 18:48:57,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:48:57,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:48:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:48:57,699 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-04-17 18:48:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:58,456 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-04-17 18:48:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:48:58,457 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 18:48:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:58,458 INFO L225 Difference]: With dead ends: 136 [2020-04-17 18:48:58,458 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 18:48:58,458 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 18:48:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 18:48:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-04-17 18:48:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:48:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-04-17 18:48:58,462 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-04-17 18:48:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:58,462 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-04-17 18:48:58,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:48:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-04-17 18:48:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:48:58,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:58,463 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:48:58,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:58,666 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:48:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:48:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-04-17 18:48:58,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:48:58,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502470037] [2020-04-17 18:48:58,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:48:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:48:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:58,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502470037] [2020-04-17 18:48:58,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831393444] [2020-04-17 18:48:58,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:48:58,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:48:58,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:48:58,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:48:58,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:48:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:48:58,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:48:58,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:48:58,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136200810] [2020-04-17 18:48:58,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:48:58,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:48:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:48:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:48:58,911 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-04-17 18:48:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:48:59,804 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-04-17 18:48:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 18:48:59,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 18:48:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:48:59,805 INFO L225 Difference]: With dead ends: 117 [2020-04-17 18:48:59,805 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 18:48:59,805 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 18:48:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 18:48:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-04-17 18:48:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 18:48:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-04-17 18:48:59,807 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-04-17 18:48:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:48:59,807 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-04-17 18:48:59,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:48:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-04-17 18:48:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:48:59,808 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:48:59,808 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:00,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:00,011 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-04-17 18:49:00,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:00,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306994339] [2020-04-17 18:49:00,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:00,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306994339] [2020-04-17 18:49:00,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284352282] [2020-04-17 18:49:00,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:00,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:49:00,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:00,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:00,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:00,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:00,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:00,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077018517] [2020-04-17 18:49:00,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:00,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:00,300 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-04-17 18:49:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:00,708 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-04-17 18:49:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:49:00,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:00,710 INFO L225 Difference]: With dead ends: 134 [2020-04-17 18:49:00,710 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:49:00,710 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:49:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:49:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-04-17 18:49:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:00,712 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:00,713 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:00,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:00,713 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:00,713 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:00,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:00,914 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-04-17 18:49:00,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:00,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081435892] [2020-04-17 18:49:00,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:01,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081435892] [2020-04-17 18:49:01,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501660160] [2020-04-17 18:49:01,150 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:01,199 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:01,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:01,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:01,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:01,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:01,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:01,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:01,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445671873] [2020-04-17 18:49:01,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:01,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:01,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:01,231 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:01,733 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-04-17 18:49:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:49:01,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:01,734 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:49:01,734 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 18:49:01,734 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:49:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 18:49:01,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-04-17 18:49:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:01,737 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:01,737 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:01,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:01,737 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:01,738 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:01,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:01,938 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-04-17 18:49:01,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:01,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196321267] [2020-04-17 18:49:01,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:02,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196321267] [2020-04-17 18:49:02,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367030719] [2020-04-17 18:49:02,149 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:02,206 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:49:02,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:02,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:02,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:02,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:02,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:02,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929491593] [2020-04-17 18:49:02,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:02,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:02,230 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:02,682 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-04-17 18:49:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:49:02,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:02,683 INFO L225 Difference]: With dead ends: 128 [2020-04-17 18:49:02,683 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 18:49:02,683 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:49:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 18:49:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-04-17 18:49:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:02,686 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:02,686 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:02,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:02,686 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:02,686 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:02,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:02,887 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-04-17 18:49:02,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:02,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542764126] [2020-04-17 18:49:02,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:03,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542764126] [2020-04-17 18:49:03,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246027875] [2020-04-17 18:49:03,106 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:03,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:49:03,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:03,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:03,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:03,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:03,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:03,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:03,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566132537] [2020-04-17 18:49:03,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:03,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:03,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:03,197 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:03,782 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-04-17 18:49:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:49:03,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:03,783 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:49:03,783 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:49:03,783 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 18:49:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:49:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-04-17 18:49:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:03,786 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:03,786 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:03,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:03,787 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:03,787 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:03,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:03,988 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-04-17 18:49:03,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:03,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268889407] [2020-04-17 18:49:03,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:04,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268889407] [2020-04-17 18:49:04,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424863365] [2020-04-17 18:49:04,200 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:04,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:04,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:04,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:04,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:04,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271873080] [2020-04-17 18:49:04,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:04,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:04,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:04,262 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:04,787 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-04-17 18:49:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:49:04,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:04,788 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:49:04,788 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:49:04,789 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:49:04,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:49:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-04-17 18:49:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:04,791 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:04,791 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:04,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:04,792 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:04,792 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:04,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:04,993 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-04-17 18:49:04,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:04,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319499960] [2020-04-17 18:49:04,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:05,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319499960] [2020-04-17 18:49:05,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498203701] [2020-04-17 18:49:05,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:05,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:05,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:05,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:05,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:05,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:05,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:05,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:05,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747658255] [2020-04-17 18:49:05,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:05,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:05,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:05,279 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:05,909 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-04-17 18:49:05,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:49:05,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:05,910 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:49:05,910 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:49:05,910 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:49:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:49:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-04-17 18:49:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:05,911 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:05,912 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:05,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:05,912 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:05,912 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:06,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:06,113 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-04-17 18:49:06,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:06,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075458613] [2020-04-17 18:49:06,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:06,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075458613] [2020-04-17 18:49:06,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235174408] [2020-04-17 18:49:06,328 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:06,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:49:06,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:06,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:06,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:06,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:06,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:06,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078228231] [2020-04-17 18:49:06,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:06,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:06,394 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:06,967 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 18:49:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:49:06,968 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:06,968 INFO L225 Difference]: With dead ends: 120 [2020-04-17 18:49:06,968 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 18:49:06,969 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:49:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 18:49:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-04-17 18:49:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:06,971 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:06,972 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:06,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:06,972 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:06,972 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:07,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:07,176 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:07,176 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-04-17 18:49:07,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:07,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249692420] [2020-04-17 18:49:07,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:07,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249692420] [2020-04-17 18:49:07,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035929228] [2020-04-17 18:49:07,374 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:07,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:07,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:07,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:07,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:07,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:07,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:07,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:07,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486690833] [2020-04-17 18:49:07,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:07,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:07,465 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:08,199 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-04-17 18:49:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:49:08,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:08,200 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:49:08,200 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:49:08,201 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:49:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:49:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-04-17 18:49:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:08,204 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:08,204 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:08,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:08,204 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:08,205 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:08,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:08,408 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-04-17 18:49:08,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:08,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446956357] [2020-04-17 18:49:08,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:08,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446956357] [2020-04-17 18:49:08,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138599826] [2020-04-17 18:49:08,594 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:08,646 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:49:08,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:08,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:08,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:08,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:08,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:08,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855328226] [2020-04-17 18:49:08,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:08,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:08,658 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:09,260 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-04-17 18:49:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:49:09,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:09,261 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:49:09,261 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 18:49:09,262 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:49:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 18:49:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-04-17 18:49:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:09,264 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:09,264 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:09,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:09,264 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:09,264 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:09,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:09,465 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:09,466 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-04-17 18:49:09,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:09,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770507089] [2020-04-17 18:49:09,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:09,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770507089] [2020-04-17 18:49:09,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028313616] [2020-04-17 18:49:09,670 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:09,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:49:09,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:09,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:09,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:09,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:09,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:09,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:09,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521884104] [2020-04-17 18:49:09,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:09,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:09,752 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:10,548 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-04-17 18:49:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:49:10,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:10,549 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:49:10,549 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 18:49:10,550 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:49:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 18:49:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-04-17 18:49:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:10,552 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:10,552 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:10,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:10,553 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:10,553 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:10,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:10,753 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:10,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-04-17 18:49:10,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:10,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831372839] [2020-04-17 18:49:10,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:10,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831372839] [2020-04-17 18:49:10,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260371812] [2020-04-17 18:49:10,935 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:10,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:10,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:10,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:10,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:11,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287045953] [2020-04-17 18:49:11,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:11,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:11,001 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:11,662 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-04-17 18:49:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 18:49:11,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:11,663 INFO L225 Difference]: With dead ends: 112 [2020-04-17 18:49:11,663 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 18:49:11,664 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:49:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 18:49:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-04-17 18:49:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:11,666 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:11,666 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:11,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:11,667 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:11,667 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:11,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:11,868 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:11,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-04-17 18:49:11,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:11,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853052994] [2020-04-17 18:49:11,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:12,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853052994] [2020-04-17 18:49:12,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788366748] [2020-04-17 18:49:12,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:12,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:12,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:12,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:12,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:12,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:12,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:12,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:12,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833452041] [2020-04-17 18:49:12,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:12,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:12,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:12,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:12,139 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:12,981 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-04-17 18:49:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:49:12,982 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:12,983 INFO L225 Difference]: With dead ends: 111 [2020-04-17 18:49:12,983 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:49:12,983 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 18:49:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:49:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-04-17 18:49:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:12,985 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:12,986 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:12,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:12,986 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:12,987 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:13,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:13,187 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-04-17 18:49:13,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:13,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478119898] [2020-04-17 18:49:13,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:13,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478119898] [2020-04-17 18:49:13,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119386356] [2020-04-17 18:49:13,359 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:13,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:49:13,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:13,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-17 18:49:13,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:13,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:13,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:13,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157009553] [2020-04-17 18:49:13,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:13,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:13,429 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:14,120 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 18:49:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:49:14,121 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:14,121 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:49:14,122 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 18:49:14,122 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 18:49:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 18:49:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-04-17 18:49:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:14,124 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:14,125 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:14,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:14,125 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:14,125 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:14,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:14,327 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-04-17 18:49:14,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:14,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589591802] [2020-04-17 18:49:14,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:14,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589591802] [2020-04-17 18:49:14,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086269714] [2020-04-17 18:49:14,500 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:14,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:14,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:14,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:14,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:14,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:14,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:14,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:14,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647008398] [2020-04-17 18:49:14,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:14,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:14,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:14,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:14,581 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:15,511 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 18:49:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 18:49:15,512 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:15,512 INFO L225 Difference]: With dead ends: 107 [2020-04-17 18:49:15,512 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:49:15,513 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 18:49:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:49:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-04-17 18:49:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:15,515 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:15,516 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:15,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:15,516 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:15,516 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:15,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:15,720 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-04-17 18:49:15,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:15,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472499385] [2020-04-17 18:49:15,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:15,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472499385] [2020-04-17 18:49:15,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537336383] [2020-04-17 18:49:15,889 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:15,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:49:15,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:15,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:15,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:15,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:15,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:15,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816940950] [2020-04-17 18:49:15,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:15,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:15,971 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:16,730 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-04-17 18:49:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 18:49:16,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:16,732 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:49:16,732 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:49:16,732 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 18:49:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:49:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-04-17 18:49:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:16,735 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 18:49:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:16,735 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:16,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:16,736 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:16,736 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:16,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:16,937 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-04-17 18:49:16,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:16,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812907370] [2020-04-17 18:49:16,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:17,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812907370] [2020-04-17 18:49:17,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617043602] [2020-04-17 18:49:17,107 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:17,169 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:49:17,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:17,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2020-04-17 18:49:17,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:17,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:17,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:17,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388180402] [2020-04-17 18:49:17,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:17,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:17,218 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 18:49:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:18,146 INFO L93 Difference]: Finished difference Result 101 states and 249 transitions. [2020-04-17 18:49:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 18:49:18,146 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:18,147 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:49:18,147 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 18:49:18,148 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 18:49:18,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 18:49:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2020-04-17 18:49:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:18,150 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 18:49:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:18,150 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:18,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:18,151 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:18,151 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:18,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:18,351 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:18,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-04-17 18:49:18,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:18,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492193531] [2020-04-17 18:49:18,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:18,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492193531] [2020-04-17 18:49:18,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230988048] [2020-04-17 18:49:18,516 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:18,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:18,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:18,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:18,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 18:49:18,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670413481] [2020-04-17 18:49:18,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:49:18,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:49:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:49:18,597 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 18:49:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:19,390 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-04-17 18:49:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:49:19,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 18:49:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:19,391 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:49:19,392 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:49:19,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 18:49:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:49:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-04-17 18:49:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 18:49:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-04-17 18:49:19,395 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-04-17 18:49:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:19,395 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-04-17 18:49:19,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:49:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-04-17 18:49:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:19,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:19,395 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:19,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:19,596 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-04-17 18:49:19,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:19,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016939762] [2020-04-17 18:49:19,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:19,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016939762] [2020-04-17 18:49:19,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809919559] [2020-04-17 18:49:19,764 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:19,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:19,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:19,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:19,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:19,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:19,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:19,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585803065] [2020-04-17 18:49:19,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:19,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:19,857 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-04-17 18:49:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:20,793 INFO L93 Difference]: Finished difference Result 98 states and 245 transitions. [2020-04-17 18:49:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 18:49:20,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:20,794 INFO L225 Difference]: With dead ends: 98 [2020-04-17 18:49:20,794 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:49:20,795 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 18:49:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:49:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-04-17 18:49:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 18:49:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-04-17 18:49:20,797 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-04-17 18:49:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:20,798 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-04-17 18:49:20,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-04-17 18:49:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:49:20,798 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:20,798 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:20,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:21,000 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-04-17 18:49:21,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:21,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871830197] [2020-04-17 18:49:21,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:21,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871830197] [2020-04-17 18:49:21,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333244573] [2020-04-17 18:49:21,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:21,231 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:49:21,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:21,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 18:49:21,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:21,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:21,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:21,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:49:21,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758219933] [2020-04-17 18:49:21,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:21,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:21,264 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-04-17 18:49:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:22,233 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-04-17 18:49:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:49:22,233 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 18:49:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:22,234 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:49:22,234 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:49:22,235 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 18:49:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:49:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-04-17 18:49:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:49:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 18:49:22,237 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-04-17 18:49:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:22,237 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 18:49:22,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 18:49:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:22,237 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:22,237 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:22,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:22,438 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-04-17 18:49:22,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:22,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244800026] [2020-04-17 18:49:22,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:22,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244800026] [2020-04-17 18:49:22,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114307406] [2020-04-17 18:49:22,631 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:22,682 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:22,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:22,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:22,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:22,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:22,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:22,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:22,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372110952] [2020-04-17 18:49:22,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:22,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:22,717 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-04-17 18:49:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:23,777 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-04-17 18:49:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:49:23,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:23,778 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:49:23,778 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 18:49:23,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 18:49:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 18:49:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-04-17 18:49:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:49:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-04-17 18:49:23,780 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-04-17 18:49:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:23,780 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-04-17 18:49:23,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-04-17 18:49:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:23,781 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:23,781 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:23,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:23,981 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-04-17 18:49:23,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:23,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146798023] [2020-04-17 18:49:23,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:24,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146798023] [2020-04-17 18:49:24,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110349029] [2020-04-17 18:49:24,231 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:24,290 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:49:24,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:24,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:24,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:24,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:24,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:24,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662748119] [2020-04-17 18:49:24,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:24,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:24,299 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-04-17 18:49:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:24,739 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-04-17 18:49:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:49:24,739 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:24,740 INFO L225 Difference]: With dead ends: 102 [2020-04-17 18:49:24,740 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:49:24,740 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:49:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:49:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-04-17 18:49:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:49:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-04-17 18:49:24,742 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-04-17 18:49:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:24,743 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-04-17 18:49:24,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-04-17 18:49:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:24,743 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:24,743 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:24,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:24,944 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-04-17 18:49:24,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:24,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821308836] [2020-04-17 18:49:24,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:25,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821308836] [2020-04-17 18:49:25,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625792235] [2020-04-17 18:49:25,220 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:25,280 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:49:25,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:25,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:25,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:25,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:25,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:25,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:25,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156710487] [2020-04-17 18:49:25,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:25,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:25,304 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-04-17 18:49:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:25,740 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-04-17 18:49:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:49:25,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:25,741 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:49:25,741 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:49:25,741 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 18:49:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:49:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-04-17 18:49:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 18:49:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-04-17 18:49:25,745 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-04-17 18:49:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:25,745 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-04-17 18:49:25,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-04-17 18:49:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:25,746 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:25,746 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:25,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:25,947 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-04-17 18:49:25,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:25,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820793747] [2020-04-17 18:49:25,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:26,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820793747] [2020-04-17 18:49:26,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945266319] [2020-04-17 18:49:26,195 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:26,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:26,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:26,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:26,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:26,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126286783] [2020-04-17 18:49:26,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:26,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:26,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:26,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:26,276 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-04-17 18:49:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:26,824 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-04-17 18:49:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:49:26,825 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:26,825 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:49:26,825 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:49:26,826 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:49:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:49:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-04-17 18:49:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 18:49:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-04-17 18:49:26,828 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-04-17 18:49:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:26,829 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-04-17 18:49:26,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-04-17 18:49:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:26,829 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:26,829 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:27,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:27,030 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-04-17 18:49:27,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:27,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103550676] [2020-04-17 18:49:27,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:27,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103550676] [2020-04-17 18:49:27,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752227746] [2020-04-17 18:49:27,271 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:27,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:27,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:27,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:27,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:27,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:27,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:27,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:27,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212541461] [2020-04-17 18:49:27,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:27,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:27,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:27,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:27,350 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-04-17 18:49:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:27,917 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-04-17 18:49:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:49:27,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:27,918 INFO L225 Difference]: With dead ends: 139 [2020-04-17 18:49:27,918 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 18:49:27,919 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:49:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 18:49:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-04-17 18:49:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:49:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-04-17 18:49:27,923 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-04-17 18:49:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:27,924 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-04-17 18:49:27,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-04-17 18:49:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:27,924 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:27,924 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:28,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:28,128 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-04-17 18:49:28,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:28,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873059773] [2020-04-17 18:49:28,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:28,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873059773] [2020-04-17 18:49:28,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561491023] [2020-04-17 18:49:28,361 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:28,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:49:28,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:28,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:28,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:28,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:28,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:28,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273522146] [2020-04-17 18:49:28,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:28,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:28,431 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-04-17 18:49:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:29,016 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-04-17 18:49:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:49:29,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:29,017 INFO L225 Difference]: With dead ends: 139 [2020-04-17 18:49:29,017 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 18:49:29,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:49:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 18:49:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-04-17 18:49:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:49:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-04-17 18:49:29,020 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-04-17 18:49:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:29,020 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-04-17 18:49:29,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-04-17 18:49:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:29,021 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:29,021 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:29,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:29,222 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:29,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-04-17 18:49:29,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:29,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341926389] [2020-04-17 18:49:29,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:29,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341926389] [2020-04-17 18:49:29,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864112909] [2020-04-17 18:49:29,459 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:29,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:29,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:29,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:29,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:29,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:29,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:29,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:29,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581856210] [2020-04-17 18:49:29,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:29,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:29,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:29,540 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-04-17 18:49:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:30,182 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-04-17 18:49:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:49:30,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:30,183 INFO L225 Difference]: With dead ends: 136 [2020-04-17 18:49:30,183 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 18:49:30,184 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:49:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 18:49:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-04-17 18:49:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:49:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-04-17 18:49:30,186 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-04-17 18:49:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:30,186 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-04-17 18:49:30,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-04-17 18:49:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:30,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:30,187 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:30,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:30,388 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-04-17 18:49:30,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:30,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893178202] [2020-04-17 18:49:30,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:30,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893178202] [2020-04-17 18:49:30,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286682060] [2020-04-17 18:49:30,621 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:30,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:49:30,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:30,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:30,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:30,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:30,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:30,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656164337] [2020-04-17 18:49:30,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:30,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:30,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:30,691 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-04-17 18:49:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:31,274 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-04-17 18:49:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:49:31,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:31,275 INFO L225 Difference]: With dead ends: 137 [2020-04-17 18:49:31,275 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 18:49:31,276 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:49:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 18:49:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-04-17 18:49:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:49:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-04-17 18:49:31,278 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-04-17 18:49:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:31,279 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-04-17 18:49:31,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-04-17 18:49:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:31,279 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:31,279 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:31,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:31,480 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-04-17 18:49:31,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:31,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580182838] [2020-04-17 18:49:31,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:31,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580182838] [2020-04-17 18:49:31,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839198727] [2020-04-17 18:49:31,712 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:31,774 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:49:31,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:31,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:31,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:31,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:31,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:31,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:31,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403977425] [2020-04-17 18:49:31,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:31,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:31,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:31,814 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-04-17 18:49:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:32,523 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-04-17 18:49:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:49:32,523 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:32,524 INFO L225 Difference]: With dead ends: 134 [2020-04-17 18:49:32,524 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:49:32,525 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:49:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:49:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-04-17 18:49:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 18:49:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-04-17 18:49:32,528 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-04-17 18:49:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:32,528 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-04-17 18:49:32,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-04-17 18:49:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:32,528 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:32,528 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:32,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:32,732 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-04-17 18:49:32,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:32,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151610780] [2020-04-17 18:49:32,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:32,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151610780] [2020-04-17 18:49:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878283369] [2020-04-17 18:49:32,968 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:33,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:33,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:33,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:33,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:33,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936897600] [2020-04-17 18:49:33,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:33,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:33,042 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-04-17 18:49:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:33,679 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-04-17 18:49:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 18:49:33,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:33,680 INFO L225 Difference]: With dead ends: 135 [2020-04-17 18:49:33,681 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:49:33,681 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:49:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:49:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-04-17 18:49:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 18:49:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-04-17 18:49:33,684 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-04-17 18:49:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:33,684 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-04-17 18:49:33,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-04-17 18:49:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:33,685 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:33,685 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:33,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:33,885 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-04-17 18:49:33,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:33,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238192966] [2020-04-17 18:49:33,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:34,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238192966] [2020-04-17 18:49:34,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658141609] [2020-04-17 18:49:34,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:34,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:34,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:34,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:34,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:34,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:34,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:34,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:34,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805685549] [2020-04-17 18:49:34,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:34,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:34,166 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-04-17 18:49:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:34,958 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-04-17 18:49:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:49:34,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:34,959 INFO L225 Difference]: With dead ends: 132 [2020-04-17 18:49:34,959 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 18:49:34,959 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 18:49:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 18:49:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-04-17 18:49:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 18:49:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-04-17 18:49:34,962 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-04-17 18:49:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:34,962 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-04-17 18:49:34,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-04-17 18:49:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:34,963 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:34,963 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:35,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:35,164 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-04-17 18:49:35,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:35,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496767051] [2020-04-17 18:49:35,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:35,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496767051] [2020-04-17 18:49:35,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561462787] [2020-04-17 18:49:35,361 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:35,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:49:35,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:35,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:35,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:35,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:35,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:35,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303527611] [2020-04-17 18:49:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:35,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:35,436 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-04-17 18:49:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:36,145 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-04-17 18:49:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:49:36,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:36,146 INFO L225 Difference]: With dead ends: 133 [2020-04-17 18:49:36,146 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 18:49:36,146 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 18:49:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 18:49:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-04-17 18:49:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 18:49:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-04-17 18:49:36,149 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-04-17 18:49:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:36,149 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-04-17 18:49:36,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-04-17 18:49:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:36,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:36,150 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:36,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:36,351 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-04-17 18:49:36,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:36,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965128031] [2020-04-17 18:49:36,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:36,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965128031] [2020-04-17 18:49:36,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961256738] [2020-04-17 18:49:36,552 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:36,603 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:36,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:36,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:36,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:36,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:36,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:36,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:36,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879509247] [2020-04-17 18:49:36,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:36,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:36,642 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-04-17 18:49:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:37,472 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-04-17 18:49:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:49:37,473 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:37,473 INFO L225 Difference]: With dead ends: 130 [2020-04-17 18:49:37,474 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 18:49:37,474 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 18:49:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 18:49:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-04-17 18:49:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:49:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-04-17 18:49:37,476 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-04-17 18:49:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:37,477 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-04-17 18:49:37,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-04-17 18:49:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:37,477 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:37,478 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:37,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:37,678 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:37,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-04-17 18:49:37,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:37,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314190415] [2020-04-17 18:49:37,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:37,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314190415] [2020-04-17 18:49:37,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85905513] [2020-04-17 18:49:37,873 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:37,928 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:49:37,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:37,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:37,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:37,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:37,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:37,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250948526] [2020-04-17 18:49:37,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:37,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:37,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:37,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:37,968 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-04-17 18:49:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:38,722 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-04-17 18:49:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 18:49:38,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:38,723 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:49:38,723 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 18:49:38,724 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 18:49:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 18:49:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-04-17 18:49:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 18:49:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-04-17 18:49:38,727 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-04-17 18:49:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:38,727 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-04-17 18:49:38,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-04-17 18:49:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:38,728 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:38,728 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:38,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:38,931 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-04-17 18:49:38,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:38,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033371899] [2020-04-17 18:49:38,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:39,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033371899] [2020-04-17 18:49:39,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142675] [2020-04-17 18:49:39,123 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:39,179 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:49:39,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:39,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:39,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:39,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:39,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:39,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:39,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043681316] [2020-04-17 18:49:39,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:39,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:39,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:39,216 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-04-17 18:49:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:40,130 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-04-17 18:49:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 18:49:40,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:40,131 INFO L225 Difference]: With dead ends: 128 [2020-04-17 18:49:40,131 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 18:49:40,132 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 18:49:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 18:49:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-04-17 18:49:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 18:49:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-04-17 18:49:40,134 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-04-17 18:49:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:40,135 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-04-17 18:49:40,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-04-17 18:49:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:40,135 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:40,136 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:40,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:40,336 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-04-17 18:49:40,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:40,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661494237] [2020-04-17 18:49:40,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:40,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661494237] [2020-04-17 18:49:40,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287950110] [2020-04-17 18:49:40,536 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:40,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:40,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:40,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:40,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:40,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146635435] [2020-04-17 18:49:40,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:40,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:40,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:40,604 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-04-17 18:49:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:41,399 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-04-17 18:49:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:49:41,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:41,400 INFO L225 Difference]: With dead ends: 129 [2020-04-17 18:49:41,400 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 18:49:41,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 18:49:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 18:49:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-04-17 18:49:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 18:49:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 18:49:41,403 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-04-17 18:49:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:41,404 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 18:49:41,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 18:49:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:41,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:41,404 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:41,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:41,605 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-04-17 18:49:41,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:41,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791424000] [2020-04-17 18:49:41,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:41,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791424000] [2020-04-17 18:49:41,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060162035] [2020-04-17 18:49:41,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:41,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:41,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:41,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:41,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:41,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:41,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:41,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:41,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421377150] [2020-04-17 18:49:41,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:41,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:41,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:41,877 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-04-17 18:49:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:42,885 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-04-17 18:49:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 18:49:42,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:42,886 INFO L225 Difference]: With dead ends: 126 [2020-04-17 18:49:42,887 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:49:42,887 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 18:49:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:49:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-04-17 18:49:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 18:49:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 18:49:42,890 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-04-17 18:49:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:42,890 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 18:49:42,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 18:49:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:42,890 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:42,891 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:43,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:43,091 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-04-17 18:49:43,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:43,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002982235] [2020-04-17 18:49:43,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:43,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002982235] [2020-04-17 18:49:43,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005860954] [2020-04-17 18:49:43,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:43,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:49:43,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:43,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 18:49:43,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:43,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:43,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:43,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361767132] [2020-04-17 18:49:43,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:43,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:43,347 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-04-17 18:49:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:44,186 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-04-17 18:49:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 18:49:44,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:44,187 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:49:44,187 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:49:44,188 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 18:49:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:49:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-04-17 18:49:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 18:49:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-04-17 18:49:44,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-04-17 18:49:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:44,191 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-04-17 18:49:44,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-04-17 18:49:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:44,192 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:44,192 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:44,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:44,395 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-04-17 18:49:44,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:44,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692014710] [2020-04-17 18:49:44,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:44,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692014710] [2020-04-17 18:49:44,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763994380] [2020-04-17 18:49:44,584 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:44,637 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:44,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:44,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:44,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:44,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:44,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:44,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:44,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717663691] [2020-04-17 18:49:44,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:44,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:44,668 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-04-17 18:49:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:45,748 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-04-17 18:49:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 18:49:45,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:45,749 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:49:45,749 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:49:45,750 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 18:49:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:49:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-04-17 18:49:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:49:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 18:49:45,752 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-04-17 18:49:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:45,753 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 18:49:45,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 18:49:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:45,753 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:45,753 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:45,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:45,954 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-04-17 18:49:45,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:45,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455113749] [2020-04-17 18:49:45,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:46,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455113749] [2020-04-17 18:49:46,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365267290] [2020-04-17 18:49:46,130 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:46,185 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:49:46,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:46,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 18:49:46,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:46,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:46,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 18:49:46,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235153439] [2020-04-17 18:49:46,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:49:46,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:49:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:49:46,201 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-04-17 18:49:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:47,077 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-04-17 18:49:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 18:49:47,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 18:49:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:47,078 INFO L225 Difference]: With dead ends: 144 [2020-04-17 18:49:47,078 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:49:47,079 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 18:49:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:49:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-04-17 18:49:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:49:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-04-17 18:49:47,081 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-04-17 18:49:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:47,081 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-04-17 18:49:47,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:49:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-04-17 18:49:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:49:47,082 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:47,082 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:47,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:47,283 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-04-17 18:49:47,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:47,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737545447] [2020-04-17 18:49:47,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737545447] [2020-04-17 18:49:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042171291] [2020-04-17 18:49:47,483 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:47,539 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:49:47,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:47,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:47,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:47,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:47,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:49:47,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116188479] [2020-04-17 18:49:47,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:47,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:47,573 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-04-17 18:49:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:48,629 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-04-17 18:49:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 18:49:48,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 18:49:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:48,630 INFO L225 Difference]: With dead ends: 125 [2020-04-17 18:49:48,630 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:49:48,631 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 18:49:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:49:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-04-17 18:49:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 18:49:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-04-17 18:49:48,633 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-04-17 18:49:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:48,633 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-04-17 18:49:48,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-04-17 18:49:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:48,634 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:48,634 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:48,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:48,835 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-04-17 18:49:48,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:48,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045973004] [2020-04-17 18:49:48,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:49,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045973004] [2020-04-17 18:49:49,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693515175] [2020-04-17 18:49:49,101 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:49,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:49,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:49,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:49,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:49:49,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271117015] [2020-04-17 18:49:49,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:49,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:49,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:49,173 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-04-17 18:49:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:49,636 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-04-17 18:49:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:49:49,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:49:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:49,637 INFO L225 Difference]: With dead ends: 144 [2020-04-17 18:49:49,637 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:49:49,637 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:49:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:49:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-04-17 18:49:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:49:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:49:49,641 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:49:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:49,641 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:49:49,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:49:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:49,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:49,641 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:49,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:49,842 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-04-17 18:49:49,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:49,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901536469] [2020-04-17 18:49:49,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:50,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901536469] [2020-04-17 18:49:50,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359798065] [2020-04-17 18:49:50,116 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:50,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:50,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:50,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:50,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:50,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:50,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:50,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:49:50,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400758955] [2020-04-17 18:49:50,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:49:50,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:49:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:49:50,200 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:49:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:50,793 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-04-17 18:49:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:49:50,794 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:49:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:50,795 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:49:50,795 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 18:49:50,795 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:49:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 18:49:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-04-17 18:49:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:49:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:49:50,798 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:49:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:50,798 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:49:50,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:49:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:49:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:50,798 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:50,798 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:50,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:50,999 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:51,000 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-04-17 18:49:51,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:51,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481277104] [2020-04-17 18:49:51,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:51,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481277104] [2020-04-17 18:49:51,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841537559] [2020-04-17 18:49:51,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:51,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:49:51,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:51,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:51,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:51,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:51,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:49:51,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408893882] [2020-04-17 18:49:51,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:51,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:51,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:51,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:51,324 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:49:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:51,870 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-04-17 18:49:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:49:51,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:49:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:51,871 INFO L225 Difference]: With dead ends: 138 [2020-04-17 18:49:51,871 INFO L226 Difference]: Without dead ends: 132 [2020-04-17 18:49:51,871 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:49:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-04-17 18:49:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-04-17 18:49:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:49:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:49:51,874 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:49:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:51,874 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:49:51,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:49:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:51,875 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:51,875 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:52,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:52,076 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-04-17 18:49:52,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:52,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315247042] [2020-04-17 18:49:52,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:52,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315247042] [2020-04-17 18:49:52,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042259794] [2020-04-17 18:49:52,339 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:52,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:52,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:52,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:52,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:52,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:52,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:52,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:49:52,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438506549] [2020-04-17 18:49:52,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:49:52,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:49:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:49:52,421 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:49:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:53,079 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-04-17 18:49:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:49:53,080 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:49:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:53,080 INFO L225 Difference]: With dead ends: 137 [2020-04-17 18:49:53,080 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 18:49:53,081 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:49:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 18:49:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-04-17 18:49:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:49:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:49:53,083 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:49:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:53,084 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:49:53,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:49:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:49:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:53,084 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:53,085 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:53,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:53,285 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-04-17 18:49:53,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:53,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730676896] [2020-04-17 18:49:53,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:53,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730676896] [2020-04-17 18:49:53,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467236595] [2020-04-17 18:49:53,529 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:53,586 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:49:53,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:53,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:53,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:53,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:53,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:49:53,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705712074] [2020-04-17 18:49:53,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:53,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:53,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:53,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:53,599 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:49:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:54,190 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-04-17 18:49:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:49:54,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:49:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:54,192 INFO L225 Difference]: With dead ends: 134 [2020-04-17 18:49:54,192 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:49:54,192 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 18:49:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:49:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-04-17 18:49:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:49:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:49:54,195 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:49:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:54,195 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:49:54,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:49:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:54,196 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:54,196 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:54,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:54,399 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-04-17 18:49:54,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:54,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480561548] [2020-04-17 18:49:54,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:54,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480561548] [2020-04-17 18:49:54,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903905362] [2020-04-17 18:49:54,641 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:54,700 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:49:54,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:54,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:54,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:54,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:54,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:54,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:49:54,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374524097] [2020-04-17 18:49:54,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:49:54,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:54,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:49:54,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:49:54,729 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:49:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:55,463 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-04-17 18:49:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:49:55,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:49:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:55,464 INFO L225 Difference]: With dead ends: 133 [2020-04-17 18:49:55,464 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 18:49:55,464 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:49:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 18:49:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-04-17 18:49:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:49:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:49:55,467 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:49:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:55,469 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:49:55,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:49:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:49:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:55,470 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:55,470 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:55,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:55,673 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-04-17 18:49:55,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:55,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547065405] [2020-04-17 18:49:55,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:55,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547065405] [2020-04-17 18:49:55,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7893247] [2020-04-17 18:49:55,897 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:55,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:55,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:55,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:55,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:49:55,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633768223] [2020-04-17 18:49:55,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:55,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:55,960 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:49:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:56,606 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-04-17 18:49:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:49:56,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:49:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:56,607 INFO L225 Difference]: With dead ends: 130 [2020-04-17 18:49:56,607 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 18:49:56,608 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:49:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 18:49:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-04-17 18:49:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:49:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:49:56,610 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:49:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:56,610 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:49:56,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:49:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:56,611 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:56,611 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:56,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:56,812 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:56,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-04-17 18:49:56,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:56,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80582855] [2020-04-17 18:49:56,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:57,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80582855] [2020-04-17 18:49:57,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415398725] [2020-04-17 18:49:57,089 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:57,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:49:57,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:57,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:57,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:57,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:57,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:57,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:49:57,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488519675] [2020-04-17 18:49:57,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:49:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:49:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:49:57,179 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:49:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:57,952 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-04-17 18:49:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:49:57,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:49:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:57,953 INFO L225 Difference]: With dead ends: 129 [2020-04-17 18:49:57,953 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 18:49:57,954 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 18:49:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 18:49:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-04-17 18:49:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:49:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:49:57,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:49:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:57,957 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:49:57,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:49:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:49:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:57,958 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:57,958 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:58,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:58,159 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-04-17 18:49:58,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:58,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928376088] [2020-04-17 18:49:58,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:58,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928376088] [2020-04-17 18:49:58,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782917658] [2020-04-17 18:49:58,382 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:58,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:49:58,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:58,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:58,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:58,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:58,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:49:58,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831599870] [2020-04-17 18:49:58,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:49:58,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:49:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:49:58,462 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:49:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:49:59,153 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-04-17 18:49:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 18:49:59,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:49:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:49:59,154 INFO L225 Difference]: With dead ends: 126 [2020-04-17 18:49:59,154 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:49:59,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 18:49:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:49:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-04-17 18:49:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:49:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:49:59,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:49:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:49:59,158 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:49:59,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:49:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:49:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:49:59,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:49:59,158 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:49:59,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:49:59,359 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:49:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:49:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-04-17 18:49:59,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:49:59,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612385097] [2020-04-17 18:49:59,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:49:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:49:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:59,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612385097] [2020-04-17 18:49:59,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463270732] [2020-04-17 18:49:59,579 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:49:59,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:49:59,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:49:59,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:49:59,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:49:59,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:49:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:49:59,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:49:59,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:49:59,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019696272] [2020-04-17 18:49:59,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:49:59,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:49:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:49:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:49:59,679 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:50:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:00,555 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-04-17 18:50:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:50:00,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:00,556 INFO L225 Difference]: With dead ends: 125 [2020-04-17 18:50:00,556 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 18:50:00,557 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 18:50:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 18:50:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-04-17 18:50:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:50:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:50:00,559 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:50:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:00,560 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:50:00,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:50:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:00,560 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:00,560 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:00,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:00,764 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-04-17 18:50:00,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:00,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619894465] [2020-04-17 18:50:00,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:00,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619894465] [2020-04-17 18:50:00,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791807632] [2020-04-17 18:50:00,979 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:01,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:50:01,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:01,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:01,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:01,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:01,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:50:01,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772982464] [2020-04-17 18:50:01,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:50:01,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:50:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:50:01,051 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:50:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:01,796 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-04-17 18:50:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:50:01,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:50:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:01,798 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:50:01,798 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:50:01,798 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 18:50:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:50:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-04-17 18:50:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:50:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:50:01,801 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:50:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:01,801 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:50:01,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:50:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:50:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:01,802 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:01,802 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:02,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:02,005 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-04-17 18:50:02,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:02,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644967511] [2020-04-17 18:50:02,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:02,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644967511] [2020-04-17 18:50:02,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038661071] [2020-04-17 18:50:02,224 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:02,282 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:50:02,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:02,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:02,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:02,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:50:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:02,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:02,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:50:02,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118852350] [2020-04-17 18:50:02,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:50:02,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:50:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:50:02,313 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:50:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:03,277 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-04-17 18:50:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 18:50:03,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:03,278 INFO L225 Difference]: With dead ends: 121 [2020-04-17 18:50:03,278 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 18:50:03,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 18:50:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 18:50:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-04-17 18:50:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:50:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:50:03,281 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:50:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:03,282 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:50:03,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:50:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:03,282 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:03,282 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:03,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:03,483 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:03,483 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-04-17 18:50:03,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:03,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907701656] [2020-04-17 18:50:03,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:03,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907701656] [2020-04-17 18:50:03,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51804008] [2020-04-17 18:50:03,697 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:03,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:03,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:03,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:03,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:50:03,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172418514] [2020-04-17 18:50:03,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:50:03,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:03,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:50:03,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:50:03,765 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:50:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:04,563 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-04-17 18:50:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 18:50:04,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:50:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:04,564 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:50:04,564 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:50:04,564 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 18:50:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:50:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-04-17 18:50:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:50:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:50:04,567 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:50:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:04,567 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:50:04,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:50:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:50:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:04,568 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:04,568 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:04,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:04,769 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-04-17 18:50:04,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:04,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895600019] [2020-04-17 18:50:04,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:05,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895600019] [2020-04-17 18:50:05,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86865631] [2020-04-17 18:50:05,018 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:05,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:50:05,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:05,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:05,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:05,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:50:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:05,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:05,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:50:05,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544097155] [2020-04-17 18:50:05,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:50:05,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:50:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:50:05,105 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:50:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:06,152 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-04-17 18:50:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 18:50:06,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:06,153 INFO L225 Difference]: With dead ends: 117 [2020-04-17 18:50:06,153 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:50:06,153 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 18:50:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:50:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-04-17 18:50:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:50:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:50:06,156 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:50:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:06,156 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:50:06,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:50:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:06,156 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:06,156 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:06,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:06,357 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-04-17 18:50:06,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:06,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223511351] [2020-04-17 18:50:06,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:06,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223511351] [2020-04-17 18:50:06,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910758097] [2020-04-17 18:50:06,560 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:06,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:50:06,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:06,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:06,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:06,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:06,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:50:06,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291992687] [2020-04-17 18:50:06,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:50:06,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:06,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:50:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:50:06,635 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:50:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:07,476 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-04-17 18:50:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:50:07,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:50:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:07,477 INFO L225 Difference]: With dead ends: 114 [2020-04-17 18:50:07,477 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 18:50:07,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 18:50:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 18:50:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-04-17 18:50:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:50:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:50:07,480 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:50:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:07,480 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:50:07,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:50:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:50:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:07,480 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:07,481 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:07,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:07,681 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-04-17 18:50:07,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:07,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540094487] [2020-04-17 18:50:07,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:07,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540094487] [2020-04-17 18:50:07,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807554380] [2020-04-17 18:50:07,886 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:07,940 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:50:07,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:07,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:07,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:07,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:50:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:07,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:07,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:50:07,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543812997] [2020-04-17 18:50:07,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:50:07,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:50:07,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:50:07,975 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:50:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:09,099 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 18:50:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 18:50:09,099 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:09,100 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:50:09,100 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 18:50:09,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 18:50:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 18:50:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-04-17 18:50:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:50:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:50:09,103 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:50:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:09,103 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:50:09,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:50:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:09,104 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:09,104 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:09,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:09,305 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:09,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-04-17 18:50:09,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:09,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007822588] [2020-04-17 18:50:09,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:09,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007822588] [2020-04-17 18:50:09,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910752606] [2020-04-17 18:50:09,505 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:09,561 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 18:50:09,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:09,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:09,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:09,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:09,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:50:09,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936244145] [2020-04-17 18:50:09,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:50:09,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:50:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:50:09,578 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:50:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:10,465 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-04-17 18:50:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 18:50:10,466 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:50:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:10,466 INFO L225 Difference]: With dead ends: 110 [2020-04-17 18:50:10,467 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 18:50:10,467 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 18:50:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 18:50:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-04-17 18:50:10,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 18:50:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 18:50:10,469 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 18:50:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:10,470 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 18:50:10,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:50:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 18:50:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:10,470 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:10,471 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:10,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:10,671 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-04-17 18:50:10,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:10,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053422312] [2020-04-17 18:50:10,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:10,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053422312] [2020-04-17 18:50:10,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903984981] [2020-04-17 18:50:10,879 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:10,938 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 18:50:10,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:10,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-17 18:50:10,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:50:10,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955340340] [2020-04-17 18:50:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:50:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:50:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:50:10,983 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 18:50:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:12,050 INFO L93 Difference]: Finished difference Result 107 states and 265 transitions. [2020-04-17 18:50:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 18:50:12,050 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:12,051 INFO L225 Difference]: With dead ends: 107 [2020-04-17 18:50:12,051 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 18:50:12,051 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1011, Invalid=2771, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 18:50:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 18:50:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-04-17 18:50:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:50:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 18:50:12,054 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 18:50:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:12,054 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 18:50:12,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 18:50:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:12,055 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:12,055 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:12,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:12,256 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-04-17 18:50:12,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:12,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792257189] [2020-04-17 18:50:12,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:12,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792257189] [2020-04-17 18:50:12,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594270187] [2020-04-17 18:50:12,454 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:12,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:12,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:12,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:12,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 18:50:12,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952370813] [2020-04-17 18:50:12,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:50:12,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:12,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:50:12,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:50:12,524 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 18:50:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:13,445 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-04-17 18:50:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 18:50:13,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 18:50:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:13,446 INFO L225 Difference]: With dead ends: 125 [2020-04-17 18:50:13,446 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 18:50:13,446 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 18:50:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 18:50:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-04-17 18:50:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 18:50:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-04-17 18:50:13,449 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-04-17 18:50:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:13,449 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-04-17 18:50:13,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:50:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-04-17 18:50:13,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:13,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:13,450 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:13,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:13,650 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-04-17 18:50:13,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:13,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374389540] [2020-04-17 18:50:13,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:13,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374389540] [2020-04-17 18:50:13,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093474081] [2020-04-17 18:50:13,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:13,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:50:13,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:13,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 18:50:13,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:13,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:13,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:50:13,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942515750] [2020-04-17 18:50:13,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:50:13,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:50:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:50:13,946 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-04-17 18:50:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:15,009 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-04-17 18:50:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 18:50:15,009 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:15,010 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:50:15,010 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:50:15,010 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 18:50:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:50:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-04-17 18:50:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 18:50:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-04-17 18:50:15,012 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-04-17 18:50:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:15,012 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-04-17 18:50:15,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-04-17 18:50:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 18:50:15,013 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:15,013 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:15,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:15,214 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-04-17 18:50:15,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:15,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210746287] [2020-04-17 18:50:15,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:15,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210746287] [2020-04-17 18:50:15,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555908338] [2020-04-17 18:50:15,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:15,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 18:50:15,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:15,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 18:50:15,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:15,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:50:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:15,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:50:15,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:50:15,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867647656] [2020-04-17 18:50:15,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:50:15,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:15,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:50:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:50:15,509 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-04-17 18:50:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:16,637 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-04-17 18:50:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 18:50:16,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 18:50:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:16,638 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:50:16,638 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 18:50:16,639 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 18:50:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 18:50:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-04-17 18:50:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:50:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-04-17 18:50:16,641 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-04-17 18:50:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:16,642 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-04-17 18:50:16,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:50:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-04-17 18:50:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:50:16,642 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:16,642 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:16,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:16,843 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-04-17 18:50:16,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:16,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202851203] [2020-04-17 18:50:16,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:16,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202851203] [2020-04-17 18:50:16,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117667355] [2020-04-17 18:50:16,974 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:17,039 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:50:17,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:17,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:50:17,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:17,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:50:17,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-04-17 18:50:17,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544749280] [2020-04-17 18:50:17,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:50:17,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:50:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:50:17,055 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-04-17 18:50:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:17,086 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-04-17 18:50:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:50:17,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-04-17 18:50:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:17,086 INFO L225 Difference]: With dead ends: 421 [2020-04-17 18:50:17,087 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:50:17,087 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:50:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:50:17,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-04-17 18:50:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:50:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-04-17 18:50:17,089 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-04-17 18:50:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:17,089 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-04-17 18:50:17,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:50:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-04-17 18:50:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:50:17,089 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:50:17,090 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:50:17,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:17,293 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:50:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:50:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-04-17 18:50:17,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:50:17,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631981315] [2020-04-17 18:50:17,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:50:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:50:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:17,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631981315] [2020-04-17 18:50:17,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821177422] [2020-04-17 18:50:17,669 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:50:17,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 18:50:17,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:50:17,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:50:17,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:50:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:50:17,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:50:17,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [24] total 37 [2020-04-17 18:50:17,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552867464] [2020-04-17 18:50:17,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:50:17,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:50:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:50:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:50:17,960 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-04-17 18:50:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:50:17,995 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-04-17 18:50:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:50:17,996 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-04-17 18:50:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:50:17,996 INFO L225 Difference]: With dead ends: 256 [2020-04-17 18:50:17,997 INFO L226 Difference]: Without dead ends: 0 [2020-04-17 18:50:17,997 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:50:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-17 18:50:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-17 18:50:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-17 18:50:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-17 18:50:17,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-04-17 18:50:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:50:17,998 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-17 18:50:17,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:50:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-17 18:50:17,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-17 18:50:18,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:50:18,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:50:18 BasicIcfg [2020-04-17 18:50:18,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:50:18,212 INFO L168 Benchmark]: Toolchain (without parser) took 230451.57 ms. Allocated memory was 137.9 MB in the beginning and 260.0 MB in the end (delta: 122.2 MB). Free memory was 101.0 MB in the beginning and 115.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 107.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,213 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 705.86 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.0 MB in the beginning and 159.2 MB in the end (delta: -60.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.08 ms. Allocated memory is still 201.9 MB. Free memory was 159.2 MB in the beginning and 157.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,216 INFO L168 Benchmark]: Boogie Preprocessor took 29.65 ms. Allocated memory is still 201.9 MB. Free memory was 157.0 MB in the beginning and 155.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,217 INFO L168 Benchmark]: RCFGBuilder took 473.54 ms. Allocated memory is still 201.9 MB. Free memory was 155.5 MB in the beginning and 135.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,217 INFO L168 Benchmark]: TraceAbstraction took 229159.45 ms. Allocated memory was 201.9 MB in the beginning and 260.0 MB in the end (delta: 58.2 MB). Free memory was 134.6 MB in the beginning and 115.6 MB in the end (delta: 19.1 MB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:50:18,220 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 705.86 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.0 MB in the beginning and 159.2 MB in the end (delta: -60.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.08 ms. Allocated memory is still 201.9 MB. Free memory was 159.2 MB in the beginning and 157.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.65 ms. Allocated memory is still 201.9 MB. Free memory was 157.0 MB in the beginning and 155.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.54 ms. Allocated memory is still 201.9 MB. Free memory was 155.5 MB in the beginning and 135.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229159.45 ms. Allocated memory was 201.9 MB in the beginning and 260.0 MB in the end (delta: 58.2 MB). Free memory was 134.6 MB in the beginning and 115.6 MB in the end (delta: 19.1 MB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 229.0s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 122.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 3890 SDtfs, 13913 SDslu, 25376 SDs, 0 SdLazy, 27921 SolverSat, 16011 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13643 GetRequests, 4495 SyntacticMatches, 234 SemanticMatches, 8914 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90740 ImplicationChecksByTransitivity, 121.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 241 MinimizatonAttempts, 6054 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 40.4s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 958311 SizeOfPredicates, 3181 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4177 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 290/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...