/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:57:18,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:57:18,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:57:18,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:57:18,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:57:18,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:57:18,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:57:18,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:57:18,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:57:18,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:57:18,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:57:18,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:57:18,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:57:18,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:57:18,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:57:18,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:57:18,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:57:18,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:57:18,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:57:18,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:57:18,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:57:18,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:57:18,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:57:18,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:57:18,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:57:18,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:57:18,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:57:18,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:57:18,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:57:18,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:57:18,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:57:18,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:57:18,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:57:18,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:57:18,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:57:18,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:57:18,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:57:18,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:57:18,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:57:18,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:57:18,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:57:18,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 22:57:18,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:57:18,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:57:18,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:57:18,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:57:18,489 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:57:18,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:57:18,490 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:57:18,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:57:18,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:57:18,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:57:18,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:57:18,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:57:18,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:57:18,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:57:18,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:57:18,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:57:18,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:57:18,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:57:18,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:57:18,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:57:18,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:57:18,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:18,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:57:18,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:57:18,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:57:18,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:57:18,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:57:18,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 22:57:18,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:57:18,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:57:18,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:57:18,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:57:18,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:57:18,820 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:57:18,820 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:57:18,821 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-04-17 22:57:18,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5fddb25/d428161fb83a413c8f80a163c7c631be/FLAGf9a798108 [2020-04-17 22:57:19,470 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:57:19,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-04-17 22:57:19,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5fddb25/d428161fb83a413c8f80a163c7c631be/FLAGf9a798108 [2020-04-17 22:57:19,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5fddb25/d428161fb83a413c8f80a163c7c631be [2020-04-17 22:57:19,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:57:19,812 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:57:19,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:19,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:57:19,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:57:19,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325a6cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:19, skipping insertion in model container [2020-04-17 22:57:19,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:57:19,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:57:20,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,434 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:57:20,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,596 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:57:20,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20 WrapperNode [2020-04-17 22:57:20,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:20,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:57:20,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:57:20,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:57:20,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:57:20,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:57:20,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:57:20,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:57:20,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (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 22:57:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 22:57:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 22:57:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 22:57:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 22:57:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:57:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 22:57:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:57:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:57:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 22:57:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:57:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:57:20,763 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 22:57:21,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:57:21,145 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 22:57:21,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:21 BoogieIcfgContainer [2020-04-17 22:57:21,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:57:21,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:57:21,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:57:21,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:57:21,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:57:19" (1/3) ... [2020-04-17 22:57:21,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b21c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:21, skipping insertion in model container [2020-04-17 22:57:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (2/3) ... [2020-04-17 22:57:21,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b21c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:21, skipping insertion in model container [2020-04-17 22:57:21,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:21" (3/3) ... [2020-04-17 22:57:21,164 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-04-17 22:57:21,176 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:57:21,176 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:57:21,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:57:21,185 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:57:21,213 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,213 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,214 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,214 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,214 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,215 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,215 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,215 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,216 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,216 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,216 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,217 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,217 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,217 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,217 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,218 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,218 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,218 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,219 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,219 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,219 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,220 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,220 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,220 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,220 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,221 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,221 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,222 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,222 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,222 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,226 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,227 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,227 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,227 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,227 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,228 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,235 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,235 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,235 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,236 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,236 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,236 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:21,252 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 22:57:21,269 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:21,269 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:21,269 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:21,270 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:21,270 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:21,270 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:21,270 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:21,270 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:21,285 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,287 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,328 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:21,328 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:21,334 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 22:57:21,338 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,357 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:21,358 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:21,359 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 22:57:21,361 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 22:57:21,362 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:22,551 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 22:57:22,661 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-04-17 22:57:22,662 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-04-17 22:57:22,666 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 22:57:22,679 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 22:57:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 22:57:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 22:57:22,692 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,693 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,694 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-04-17 22:57:22,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081793231] [2020-04-17 22:57:22,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,072 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 22:57:23,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081793231] [2020-04-17 22:57:23,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:23,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973669346] [2020-04-17 22:57:23,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:23,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:23,104 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 22:57:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,182 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 22:57:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:23,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 22:57:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,208 INFO L225 Difference]: With dead ends: 83 [2020-04-17 22:57:23,208 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 22:57:23,210 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 22:57:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 22:57:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 22:57:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 22:57:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 22:57:23,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 22:57:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,263 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 22:57:23,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 22:57:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,265 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,265 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-04-17 22:57:23,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100518987] [2020-04-17 22:57:23,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,403 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 22:57:23,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100518987] [2020-04-17 22:57:23,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142870372] [2020-04-17 22:57:23,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,408 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 22:57:23,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,492 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 22:57:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,495 INFO L225 Difference]: With dead ends: 80 [2020-04-17 22:57:23,495 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 22:57:23,496 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 22:57:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 22:57:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 22:57:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 22:57:23,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 22:57:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,509 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 22:57:23,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 22:57:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,511 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,511 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,511 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-04-17 22:57:23,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116380075] [2020-04-17 22:57:23,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,626 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 22:57:23,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116380075] [2020-04-17 22:57:23,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761587423] [2020-04-17 22:57:23,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,629 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 22:57:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,662 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 22:57:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:23,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,664 INFO L225 Difference]: With dead ends: 73 [2020-04-17 22:57:23,665 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 22:57:23,665 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 22:57:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 22:57:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 22:57:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 22:57:23,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 22:57:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,679 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 22:57:23,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 22:57:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,680 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,680 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,680 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-04-17 22:57:23,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658018041] [2020-04-17 22:57:23,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,753 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 22:57:23,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658018041] [2020-04-17 22:57:23,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146124405] [2020-04-17 22:57:23,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,756 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 22:57:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,825 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 22:57:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,827 INFO L225 Difference]: With dead ends: 86 [2020-04-17 22:57:23,827 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 22:57:23,828 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 22:57:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 22:57:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 22:57:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 22:57:23,837 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 22:57:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,838 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 22:57:23,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 22:57:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,839 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,839 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,840 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,840 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-04-17 22:57:23,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449763459] [2020-04-17 22:57:23,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,943 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 22:57:23,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449763459] [2020-04-17 22:57:23,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21587494] [2020-04-17 22:57:23,944 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:24,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:24,099 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 22:57:24,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 22:57:24,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571104763] [2020-04-17 22:57:24,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:24,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:24,104 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 22:57:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,227 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 22:57:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:24,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 22:57:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,230 INFO L225 Difference]: With dead ends: 101 [2020-04-17 22:57:24,230 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 22:57:24,230 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 22:57:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 22:57:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 22:57:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 22:57:24,239 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 22:57:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,239 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 22:57:24,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 22:57:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,241 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,241 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,446 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-04-17 22:57:24,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660571267] [2020-04-17 22:57:24,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,555 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 22:57:24,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660571267] [2020-04-17 22:57:24,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736328580] [2020-04-17 22:57:24,556 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:24,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:24,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,685 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 22:57:24,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669443662] [2020-04-17 22:57:24,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,688 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 22:57:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,723 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 22:57:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:24,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,725 INFO L225 Difference]: With dead ends: 84 [2020-04-17 22:57:24,725 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 22:57:24,726 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 22:57:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 22:57:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 22:57:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 22:57:24,733 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 22:57:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,734 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 22:57:24,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 22:57:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,735 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,735 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,942 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-04-17 22:57:24,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922845115] [2020-04-17 22:57:24,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,040 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 22:57:25,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922845115] [2020-04-17 22:57:25,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121555319] [2020-04-17 22:57:25,041 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 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 22:57:25,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:25,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:25,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:25,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:25,149 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 22:57:25,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:25,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:25,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436268813] [2020-04-17 22:57:25,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:25,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,152 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 22:57:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,210 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 22:57:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:25,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,212 INFO L225 Difference]: With dead ends: 90 [2020-04-17 22:57:25,212 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 22:57:25,212 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 22:57:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 22:57:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 22:57:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 22:57:25,220 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 22:57:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,221 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 22:57:25,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 22:57:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:25,222 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,222 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,426 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-04-17 22:57:25,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368311456] [2020-04-17 22:57:25,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,490 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 22:57:25,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368311456] [2020-04-17 22:57:25,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225198299] [2020-04-17 22:57:25,491 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 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 22:57:25,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:25,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:25,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:25,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:25,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:25,612 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 22:57:25,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:25,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:25,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109442812] [2020-04-17 22:57:25,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:25,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,614 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 22:57:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,751 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 22:57:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,753 INFO L225 Difference]: With dead ends: 99 [2020-04-17 22:57:25,753 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 22:57:25,753 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 22:57:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 22:57:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 22:57:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 22:57:25,765 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 22:57:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,770 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 22:57:25,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 22:57:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,775 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,775 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,976 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,977 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-04-17 22:57:25,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890009989] [2020-04-17 22:57:25,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,079 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 22:57:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890009989] [2020-04-17 22:57:26,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:26,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880980815] [2020-04-17 22:57:26,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:26,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,081 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 22:57:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,108 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 22:57:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:26,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,109 INFO L225 Difference]: With dead ends: 92 [2020-04-17 22:57:26,109 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 22:57:26,110 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 22:57:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 22:57:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 22:57:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 22:57:26,116 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 22:57:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,116 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 22:57:26,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 22:57:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,117 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,117 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,118 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-04-17 22:57:26,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82504873] [2020-04-17 22:57:26,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,175 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 22:57:26,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82504873] [2020-04-17 22:57:26,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:26,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:26,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028771380] [2020-04-17 22:57:26,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:26,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,177 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 22:57:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,220 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 22:57:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:26,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,222 INFO L225 Difference]: With dead ends: 100 [2020-04-17 22:57:26,222 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 22:57:26,222 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 22:57:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 22:57:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 22:57:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 22:57:26,227 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 22:57:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,228 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 22:57:26,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 22:57:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,229 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,229 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,229 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-04-17 22:57:26,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714157367] [2020-04-17 22:57:26,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,279 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 22:57:26,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714157367] [2020-04-17 22:57:26,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:26,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:26,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970444147] [2020-04-17 22:57:26,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:26,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,282 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 22:57:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,356 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:26,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,357 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:26,357 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:26,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 22:57:26,362 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 22:57:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,363 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 22:57:26,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 22:57:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,364 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,364 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,364 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-04-17 22:57:26,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643290111] [2020-04-17 22:57:26,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,417 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 22:57:26,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643290111] [2020-04-17 22:57:26,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:26,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:26,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11706589] [2020-04-17 22:57:26,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:26,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,434 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 22:57:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,518 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:26,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,520 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:26,520 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:26,520 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 22:57:26,526 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 22:57:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,527 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 22:57:26,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 22:57:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,528 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,528 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,529 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-04-17 22:57:26,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285170510] [2020-04-17 22:57:26,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285170510] [2020-04-17 22:57:26,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127746763] [2020-04-17 22:57:26,630 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 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 22:57:26,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:26,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:26,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:26,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:26,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:26,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:57:26,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899250296] [2020-04-17 22:57:26,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:26,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:26,773 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 22:57:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,905 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 22:57:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:26,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 22:57:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,907 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:26,907 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:26,907 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 22:57:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 22:57:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 22:57:26,912 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 22:57:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,912 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 22:57:26,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 22:57:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,913 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,118 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-04-17 22:57:27,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532596805] [2020-04-17 22:57:27,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532596805] [2020-04-17 22:57:27,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263299522] [2020-04-17 22:57:27,201 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 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 22:57:27,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:27,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:27,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334760461] [2020-04-17 22:57:27,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,330 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 22:57:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,372 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 22:57:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:27,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,374 INFO L225 Difference]: With dead ends: 108 [2020-04-17 22:57:27,374 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 22:57:27,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 22:57:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 22:57:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 22:57:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 22:57:27,379 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 22:57:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,379 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 22:57:27,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 22:57:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,380 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,380 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,584 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-04-17 22:57:27,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301536422] [2020-04-17 22:57:27,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301536422] [2020-04-17 22:57:27,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960175678] [2020-04-17 22:57:27,660 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718899133] [2020-04-17 22:57:27,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,803 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 22:57:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,869 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 22:57:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:27,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,871 INFO L225 Difference]: With dead ends: 116 [2020-04-17 22:57:27,871 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 22:57:27,871 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 22:57:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 22:57:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 22:57:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 22:57:27,875 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 22:57:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,876 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 22:57:27,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 22:57:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,877 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,877 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,078 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-04-17 22:57:28,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935623099] [2020-04-17 22:57:28,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935623099] [2020-04-17 22:57:28,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626097290] [2020-04-17 22:57:28,159 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 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 22:57:28,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:28,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850602121] [2020-04-17 22:57:28,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,306 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 22:57:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,417 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 22:57:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:28,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,419 INFO L225 Difference]: With dead ends: 115 [2020-04-17 22:57:28,419 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 22:57:28,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 22:57:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 22:57:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 22:57:28,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 22:57:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,424 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 22:57:28,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 22:57:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:28,425 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,425 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,632 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-04-17 22:57:28,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829067702] [2020-04-17 22:57:28,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829067702] [2020-04-17 22:57:28,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967847821] [2020-04-17 22:57:28,699 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 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 22:57:28,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:28,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185298027] [2020-04-17 22:57:28,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,811 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 22:57:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,932 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 22:57:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:28,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,933 INFO L225 Difference]: With dead ends: 124 [2020-04-17 22:57:28,934 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 22:57:28,934 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 22:57:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 22:57:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 22:57:28,938 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 22:57:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,939 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 22:57:28,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 22:57:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:28,939 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,939 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,143 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-04-17 22:57:29,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338029381] [2020-04-17 22:57:29,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,215 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 22:57:29,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338029381] [2020-04-17 22:57:29,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001078822] [2020-04-17 22:57:29,216 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 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 22:57:29,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:29,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:29,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,334 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 22:57:29,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726526673] [2020-04-17 22:57:29,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,337 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 22:57:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,380 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 22:57:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:29,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,382 INFO L225 Difference]: With dead ends: 113 [2020-04-17 22:57:29,382 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 22:57:29,383 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 22:57:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 22:57:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 22:57:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 22:57:29,387 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 22:57:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,387 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 22:57:29,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 22:57:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,388 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,388 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,589 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-04-17 22:57:29,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645223447] [2020-04-17 22:57:29,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,666 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 22:57:29,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645223447] [2020-04-17 22:57:29,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967575042] [2020-04-17 22:57:29,668 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:29,712 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:29,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:29,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,771 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 22:57:29,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084385102] [2020-04-17 22:57:29,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,774 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 22:57:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,852 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 22:57:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:29,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,853 INFO L225 Difference]: With dead ends: 118 [2020-04-17 22:57:29,854 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 22:57:29,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 22:57:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 22:57:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 22:57:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 22:57:29,858 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 22:57:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,858 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 22:57:29,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 22:57:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,859 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,859 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,063 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-04-17 22:57:30,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226988552] [2020-04-17 22:57:30,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,144 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 22:57:30,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226988552] [2020-04-17 22:57:30,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330033131] [2020-04-17 22:57:30,145 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,298 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 22:57:30,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939409553] [2020-04-17 22:57:30,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,306 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 22:57:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,411 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 22:57:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:30,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,413 INFO L225 Difference]: With dead ends: 119 [2020-04-17 22:57:30,413 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:30,414 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 22:57:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 22:57:30,420 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 22:57:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,421 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 22:57:30,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 22:57:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,422 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,422 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,627 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-04-17 22:57:30,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661329359] [2020-04-17 22:57:30,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,760 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 22:57:30,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661329359] [2020-04-17 22:57:30,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769638400] [2020-04-17 22:57:30,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:30,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:30,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,970 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 22:57:30,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655421086] [2020-04-17 22:57:30,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,972 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 22:57:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,057 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 22:57:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:31,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,059 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:31,060 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 22:57:31,060 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 22:57:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 22:57:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 22:57:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 22:57:31,068 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 22:57:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,069 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 22:57:31,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 22:57:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,070 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,070 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,276 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-04-17 22:57:31,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041386939] [2020-04-17 22:57:31,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,355 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 22:57:31,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041386939] [2020-04-17 22:57:31,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600544265] [2020-04-17 22:57:31,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:31,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,476 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 22:57:31,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452906092] [2020-04-17 22:57:31,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,477 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,589 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 22:57:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:31,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,590 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:31,590 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:31,591 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 22:57:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 22:57:31,595 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 22:57:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,595 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 22:57:31,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 22:57:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,596 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,596 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,797 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-04-17 22:57:31,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633108445] [2020-04-17 22:57:31,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,861 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 22:57:31,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633108445] [2020-04-17 22:57:31,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709438489] [2020-04-17 22:57:31,862 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:31,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,989 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 22:57:31,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654794078] [2020-04-17 22:57:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,991 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 22:57:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,077 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 22:57:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:32,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,078 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:32,079 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:32,079 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 22:57:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 22:57:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 22:57:32,083 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 22:57:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,083 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 22:57:32,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 22:57:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,086 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,086 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,287 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-04-17 22:57:32,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717853661] [2020-04-17 22:57:32,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,359 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 22:57:32,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717853661] [2020-04-17 22:57:32,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833269063] [2020-04-17 22:57:32,360 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,411 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:32,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:32,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:32,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:32,573 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 22:57:32,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152386671] [2020-04-17 22:57:32,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,577 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 22:57:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,770 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 22:57:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:32,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,771 INFO L225 Difference]: With dead ends: 133 [2020-04-17 22:57:32,771 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:32,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 22:57:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 22:57:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 22:57:32,776 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 22:57:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,777 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 22:57:32,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 22:57:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,778 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,778 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,982 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-04-17 22:57:32,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303875601] [2020-04-17 22:57:32,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,034 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 22:57:33,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303875601] [2020-04-17 22:57:33,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106381728] [2020-04-17 22:57:33,035 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,085 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:33,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:33,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,155 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 22:57:33,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108908939] [2020-04-17 22:57:33,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,157 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,270 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 22:57:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:33,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,273 INFO L225 Difference]: With dead ends: 127 [2020-04-17 22:57:33,273 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 22:57:33,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 22:57:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 22:57:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:33,277 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,277 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:33,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,278 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:33,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,481 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:33,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-04-17 22:57:33,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:33,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512046438] [2020-04-17 22:57:33,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,535 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 22:57:33,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512046438] [2020-04-17 22:57:33,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47899768] [2020-04-17 22:57:33,536 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 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 22:57:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:33,644 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 22:57:33,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710283205] [2020-04-17 22:57:33,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,646 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,846 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 22:57:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:33,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,848 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:33,848 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:33,849 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 22:57:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:33,853 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,853 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:33,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,854 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,854 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,055 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-04-17 22:57:34,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199707864] [2020-04-17 22:57:34,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,115 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 22:57:34,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199707864] [2020-04-17 22:57:34,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290937337] [2020-04-17 22:57:34,116 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 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 22:57:34,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:34,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:34,214 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 22:57:34,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:34,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770325904] [2020-04-17 22:57:34,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:34,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:34,215 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,386 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 22:57:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:34,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,388 INFO L225 Difference]: With dead ends: 136 [2020-04-17 22:57:34,388 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 22:57:34,389 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 22:57:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 22:57:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 22:57:34,393 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 22:57:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,394 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 22:57:34,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 22:57:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,395 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,599 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-04-17 22:57:34,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019606883] [2020-04-17 22:57:34,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,675 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 22:57:34,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019606883] [2020-04-17 22:57:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254578118] [2020-04-17 22:57:34,676 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:34,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,782 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 22:57:34,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:34,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601160801] [2020-04-17 22:57:34,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:34,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:34,784 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 22:57:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,880 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 22:57:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:34,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,885 INFO L225 Difference]: With dead ends: 130 [2020-04-17 22:57:34,885 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:34,886 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 22:57:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:34,889 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,890 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:34,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,890 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,890 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,095 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-04-17 22:57:35,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230744176] [2020-04-17 22:57:35,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,156 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 22:57:35,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230744176] [2020-04-17 22:57:35,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763636431] [2020-04-17 22:57:35,157 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,198 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:35,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,263 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 22:57:35,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154388671] [2020-04-17 22:57:35,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,265 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,417 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 22:57:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:35,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,419 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:35,419 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:35,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 22:57:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:35,424 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,425 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:35,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,425 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,426 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,629 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-04-17 22:57:35,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310937273] [2020-04-17 22:57:35,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,680 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 22:57:35,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310937273] [2020-04-17 22:57:35,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668167392] [2020-04-17 22:57:35,681 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:35,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:35,790 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 22:57:35,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015241500] [2020-04-17 22:57:35,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,792 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,944 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 22:57:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:35,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,946 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:35,947 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 22:57:35,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 22:57:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 22:57:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:35,953 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,953 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:35,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,954 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,954 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:36,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,155 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-04-17 22:57:36,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:36,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919723759] [2020-04-17 22:57:36,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,206 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 22:57:36,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919723759] [2020-04-17 22:57:36,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253288823] [2020-04-17 22:57:36,207 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,244 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:36,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:36,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:36,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643228820] [2020-04-17 22:57:36,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:36,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:36,322 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,538 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 22:57:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:36,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,540 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:36,540 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:36,541 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 22:57:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:36,546 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,546 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:36,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,547 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,547 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:36,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,751 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:36,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-04-17 22:57:36,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:36,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605858324] [2020-04-17 22:57:36,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,810 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 22:57:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605858324] [2020-04-17 22:57:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800039229] [2020-04-17 22:57:36,811 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,968 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 22:57:36,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:36,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220449169] [2020-04-17 22:57:36,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:36,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:36,970 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,150 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 22:57:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:37,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,152 INFO L225 Difference]: With dead ends: 135 [2020-04-17 22:57:37,152 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 22:57:37,152 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 22:57:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 22:57:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 22:57:37,156 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 22:57:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,157 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 22:57:37,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 22:57:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,158 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,361 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-04-17 22:57:37,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381331352] [2020-04-17 22:57:37,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381331352] [2020-04-17 22:57:37,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364847908] [2020-04-17 22:57:37,424 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 22:57:37,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:37,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:37,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:37,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:37,606 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 22:57:37,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 22:57:37,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902442770] [2020-04-17 22:57:37,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:37,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:37,607 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 22:57:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,759 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 22:57:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:37,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 22:57:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,761 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:37,762 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:37,762 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 22:57:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 22:57:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 22:57:37,767 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 22:57:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,767 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 22:57:37,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 22:57:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,768 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,769 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,973 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-04-17 22:57:37,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105418325] [2020-04-17 22:57:37,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,077 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 22:57:38,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105418325] [2020-04-17 22:57:38,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204118004] [2020-04-17 22:57:38,078 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,124 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:38,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,221 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 22:57:38,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40967762] [2020-04-17 22:57:38,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,223 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 22:57:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,271 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 22:57:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:38,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,273 INFO L225 Difference]: With dead ends: 132 [2020-04-17 22:57:38,273 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:38,274 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 22:57:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:38,278 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,278 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:38,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,279 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,279 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,482 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-04-17 22:57:38,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938631341] [2020-04-17 22:57:38,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938631341] [2020-04-17 22:57:38,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196513334] [2020-04-17 22:57:38,579 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,622 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:38,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,726 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 22:57:38,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924043710] [2020-04-17 22:57:38,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,728 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,785 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 22:57:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:38,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,786 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:38,787 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:38,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 22:57:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:38,791 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,791 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:38,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,792 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,792 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,996 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-04-17 22:57:38,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330575096] [2020-04-17 22:57:38,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,077 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 22:57:39,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330575096] [2020-04-17 22:57:39,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145275798] [2020-04-17 22:57:39,078 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:39,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:39,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,221 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 22:57:39,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871526711] [2020-04-17 22:57:39,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,223 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,309 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 22:57:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:39,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,312 INFO L225 Difference]: With dead ends: 142 [2020-04-17 22:57:39,312 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 22:57:39,313 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 22:57:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 22:57:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 22:57:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 22:57:39,318 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 22:57:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,318 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 22:57:39,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 22:57:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:39,319 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,319 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:39,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,522 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-04-17 22:57:39,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:39,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815473872] [2020-04-17 22:57:39,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,596 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 22:57:39,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815473872] [2020-04-17 22:57:39,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627373885] [2020-04-17 22:57:39,596 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,730 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 22:57:39,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733010725] [2020-04-17 22:57:39,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,733 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 22:57:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,852 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 22:57:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:39,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,854 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:39,854 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:39,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 22:57:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 22:57:39,859 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 22:57:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,859 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 22:57:39,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 22:57:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:39,860 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,860 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,065 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-04-17 22:57:40,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148030150] [2020-04-17 22:57:40,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,126 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 22:57:40,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148030150] [2020-04-17 22:57:40,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833388555] [2020-04-17 22:57:40,127 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:40,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:40,263 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 22:57:40,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540597344] [2020-04-17 22:57:40,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,267 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,428 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:40,429 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,430 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:40,431 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 22:57:40,431 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 22:57:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 22:57:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 22:57:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 22:57:40,437 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 22:57:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:40,437 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 22:57:40,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 22:57:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:40,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,439 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,643 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,644 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-04-17 22:57:40,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799096245] [2020-04-17 22:57:40,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799096245] [2020-04-17 22:57:40,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589420617] [2020-04-17 22:57:40,752 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 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 22:57:40,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:40,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034652367] [2020-04-17 22:57:40,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,969 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,042 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 22:57:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:41,042 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,044 INFO L225 Difference]: With dead ends: 138 [2020-04-17 22:57:41,044 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:41,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 22:57:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 22:57:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 22:57:41,050 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 22:57:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,051 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 22:57:41,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 22:57:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,052 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,052 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,257 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-04-17 22:57:41,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803538554] [2020-04-17 22:57:41,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,329 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 22:57:41,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803538554] [2020-04-17 22:57:41,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845998261] [2020-04-17 22:57:41,330 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 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 22:57:41,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:41,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:41,472 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 22:57:41,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:41,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:41,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682267435] [2020-04-17 22:57:41,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:41,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:41,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,474 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,617 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 22:57:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:41,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,618 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:41,618 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 22:57:41,619 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 22:57:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 22:57:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 22:57:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 22:57:41,622 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 22:57:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,623 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 22:57:41,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 22:57:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,624 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,624 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,828 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-04-17 22:57:41,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112404104] [2020-04-17 22:57:41,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,900 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 22:57:41,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112404104] [2020-04-17 22:57:41,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42828408] [2020-04-17 22:57:41,901 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 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 22:57:41,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:41,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,045 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 22:57:42,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680370143] [2020-04-17 22:57:42,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,047 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 22:57:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,210 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,212 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:42,212 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 22:57:42,213 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 22:57:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 22:57:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 22:57:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 22:57:42,219 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 22:57:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,219 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 22:57:42,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 22:57:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,221 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,422 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-04-17 22:57:42,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:42,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083072047] [2020-04-17 22:57:42,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,509 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 22:57:42,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083072047] [2020-04-17 22:57:42,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692215591] [2020-04-17 22:57:42,510 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:42,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:42,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:42,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:42,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,675 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 22:57:42,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077641991] [2020-04-17 22:57:42,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,676 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,788 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 22:57:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,789 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:42,789 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:42,790 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 22:57:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:42,794 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,794 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:42,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,796 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,999 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-04-17 22:57:43,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223631767] [2020-04-17 22:57:43,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223631767] [2020-04-17 22:57:43,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872379024] [2020-04-17 22:57:43,096 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 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 22:57:43,147 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:43,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:43,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441472522] [2020-04-17 22:57:43,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,268 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,386 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 22:57:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:43,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,388 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:43,388 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:43,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 22:57:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 22:57:43,393 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 22:57:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,393 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 22:57:43,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 22:57:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,394 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,394 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,597 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-04-17 22:57:43,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39976808] [2020-04-17 22:57:43,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39976808] [2020-04-17 22:57:43,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419711920] [2020-04-17 22:57:43,674 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 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 22:57:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196807457] [2020-04-17 22:57:43,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,808 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 22:57:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,872 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 22:57:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:43,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,874 INFO L225 Difference]: With dead ends: 152 [2020-04-17 22:57:43,874 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 22:57:43,874 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 22:57:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 22:57:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 22:57:43,878 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 22:57:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,879 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 22:57:43,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 22:57:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,879 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,880 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,083 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-04-17 22:57:44,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459536698] [2020-04-17 22:57:44,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459536698] [2020-04-17 22:57:44,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996337135] [2020-04-17 22:57:44,153 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 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 22:57:44,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:44,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,306 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 22:57:44,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194941423] [2020-04-17 22:57:44,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,308 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 22:57:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,451 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 22:57:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:44,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,453 INFO L225 Difference]: With dead ends: 153 [2020-04-17 22:57:44,454 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 22:57:44,454 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 22:57:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 22:57:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:44,459 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,459 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:44,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:44,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,460 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,663 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-04-17 22:57:44,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093644315] [2020-04-17 22:57:44,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,726 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 22:57:44,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093644315] [2020-04-17 22:57:44,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061371360] [2020-04-17 22:57:44,726 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 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 22:57:44,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:44,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,852 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 22:57:44,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497347316] [2020-04-17 22:57:44,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,854 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,033 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:45,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,035 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:45,035 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:45,036 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 22:57:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 22:57:45,040 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 22:57:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,040 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 22:57:45,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 22:57:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,041 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,244 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-04-17 22:57:45,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407385373] [2020-04-17 22:57:45,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407385373] [2020-04-17 22:57:45,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375360941] [2020-04-17 22:57:45,317 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 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 22:57:45,377 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:45,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:45,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68118513] [2020-04-17 22:57:45,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:45,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:45,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:45,476 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,559 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 22:57:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:45,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,561 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:45,561 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:45,561 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 22:57:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:45,565 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,565 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:45,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,566 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,566 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,767 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-04-17 22:57:45,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715700272] [2020-04-17 22:57:45,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,837 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 22:57:45,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715700272] [2020-04-17 22:57:45,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967023930] [2020-04-17 22:57:45,837 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:45,884 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:45,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,972 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 22:57:45,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:45,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067995309] [2020-04-17 22:57:45,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:45,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:45,974 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,131 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 22:57:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:46,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,133 INFO L225 Difference]: With dead ends: 157 [2020-04-17 22:57:46,134 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:46,134 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 22:57:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 22:57:46,138 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 22:57:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,138 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 22:57:46,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 22:57:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,139 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,139 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,340 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-04-17 22:57:46,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115999477] [2020-04-17 22:57:46,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115999477] [2020-04-17 22:57:46,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423417404] [2020-04-17 22:57:46,417 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 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 22:57:46,461 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:46,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:46,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:57:46,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:46,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 22:57:46,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803463032] [2020-04-17 22:57:46,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:46,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:46,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:46,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:46,492 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-04-17 22:57:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,566 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 22:57:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:46,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 22:57:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,567 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:46,567 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:46,567 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 22:57:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:46,571 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,571 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:46,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:46,571 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,572 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,572 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,773 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-04-17 22:57:46,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105267460] [2020-04-17 22:57:46,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105267460] [2020-04-17 22:57:46,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612485093] [2020-04-17 22:57:46,828 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:46,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:46,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:47,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047359312] [2020-04-17 22:57:47,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:47,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:47,006 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,244 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 22:57:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:47,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,246 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:47,246 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:47,247 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 22:57:47,251 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 22:57:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,251 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 22:57:47,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 22:57:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:47,252 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,252 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,455 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-04-17 22:57:47,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052260688] [2020-04-17 22:57:47,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,511 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 22:57:47,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052260688] [2020-04-17 22:57:47,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732713084] [2020-04-17 22:57:47,511 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 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 22:57:47,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:47,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:47,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,691 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 22:57:47,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:47,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197293880] [2020-04-17 22:57:47,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:47,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:47,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:47,694 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,917 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:47,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,919 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:47,919 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:47,919 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 22:57:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:47,924 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,924 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:47,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:47,925 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,925 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,129 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-04-17 22:57:48,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033049008] [2020-04-17 22:57:48,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033049008] [2020-04-17 22:57:48,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583812651] [2020-04-17 22:57:48,181 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 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 22:57:48,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:48,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:48,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:48,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:48,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:48,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:48,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26581604] [2020-04-17 22:57:48,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:48,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:48,326 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:48,702 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 22:57:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:48,702 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:48,703 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:57:48,703 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 22:57:48,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:57:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 22:57:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 22:57:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:48,707 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:48,707 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:48,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:48,708 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:48,708 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,911 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-04-17 22:57:48,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503692807] [2020-04-17 22:57:48,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:48,977 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 22:57:48,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503692807] [2020-04-17 22:57:48,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241073052] [2020-04-17 22:57:48,978 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 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 22:57:49,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:49,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:49,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:49,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:49,157 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 22:57:49,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028274860] [2020-04-17 22:57:49,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,159 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,380 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 22:57:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:49,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,382 INFO L225 Difference]: With dead ends: 166 [2020-04-17 22:57:49,382 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:49,382 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 22:57:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 22:57:49,386 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 22:57:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,387 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 22:57:49,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 22:57:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,388 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,388 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:49,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,591 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-04-17 22:57:49,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:49,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002454970] [2020-04-17 22:57:49,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:49,680 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 22:57:49,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002454970] [2020-04-17 22:57:49,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964234063] [2020-04-17 22:57:49,681 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 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 22:57:49,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:49,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:49,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:49,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,841 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 22:57:49,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661617110] [2020-04-17 22:57:49,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,843 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:50,000 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 22:57:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:50,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:50,002 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:57:50,002 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:50,002 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 22:57:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 22:57:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 22:57:50,006 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 22:57:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:50,006 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 22:57:50,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 22:57:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:50,007 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,007 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,208 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-04-17 22:57:50,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565529299] [2020-04-17 22:57:50,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565529299] [2020-04-17 22:57:50,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279774376] [2020-04-17 22:57:50,265 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:50,308 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:50,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:50,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:50,380 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 22:57:50,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:50,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:50,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471925408] [2020-04-17 22:57:50,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:50,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:50,382 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:50,661 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 22:57:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:50,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:50,663 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:57:50,663 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 22:57:50,663 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 22:57:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 22:57:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 22:57:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 22:57:50,666 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 22:57:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:50,667 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 22:57:50,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 22:57:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:50,667 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,668 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,868 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-04-17 22:57:50,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30996678] [2020-04-17 22:57:50,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30996678] [2020-04-17 22:57:50,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877978706] [2020-04-17 22:57:50,923 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 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 22:57:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:51,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448340847] [2020-04-17 22:57:51,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:51,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:51,039 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 22:57:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,325 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 22:57:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:51,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,326 INFO L225 Difference]: With dead ends: 177 [2020-04-17 22:57:51,327 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:57:51,327 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:57:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 22:57:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 22:57:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 22:57:51,331 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 22:57:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,331 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 22:57:51,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 22:57:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:51,332 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,332 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:51,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,533 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-04-17 22:57:51,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:51,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513728473] [2020-04-17 22:57:51,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513728473] [2020-04-17 22:57:51,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953323357] [2020-04-17 22:57:51,589 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 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 22:57:51,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:51,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:51,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:51,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:51,703 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 22:57:51,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:51,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941054668] [2020-04-17 22:57:51,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:51,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:51,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:51,704 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 22:57:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,089 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 22:57:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:52,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,091 INFO L225 Difference]: With dead ends: 190 [2020-04-17 22:57:52,091 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:57:52,092 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:57:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 22:57:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 22:57:52,095 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 22:57:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,096 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 22:57:52,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 22:57:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,096 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,096 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,297 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-04-17 22:57:52,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830722691] [2020-04-17 22:57:52,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,352 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 22:57:52,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830722691] [2020-04-17 22:57:52,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133491510] [2020-04-17 22:57:52,353 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 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 22:57:52,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:52,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:52,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:52,458 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 22:57:52,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:52,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020642364] [2020-04-17 22:57:52,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:52,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:52,459 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 22:57:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,814 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 22:57:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:52,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,816 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:52,816 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:52,817 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 22:57:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 22:57:52,821 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 22:57:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,821 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 22:57:52,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 22:57:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,821 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,022 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-04-17 22:57:53,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52230821] [2020-04-17 22:57:53,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,084 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 22:57:53,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52230821] [2020-04-17 22:57:53,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293683614] [2020-04-17 22:57:53,085 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:53,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:53,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:53,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:53,211 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 22:57:53,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:53,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:53,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088248148] [2020-04-17 22:57:53,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:53,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:53,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:53,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:53,212 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 22:57:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,359 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 22:57:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:53,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,361 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:53,361 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 22:57:53,362 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 22:57:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 22:57:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 22:57:53,365 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 22:57:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,365 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 22:57:53,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 22:57:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,366 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,366 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,567 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-04-17 22:57:53,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162978265] [2020-04-17 22:57:53,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162978265] [2020-04-17 22:57:53,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298509351] [2020-04-17 22:57:53,634 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 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 22:57:53,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:53,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:53,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:53,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:53,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433305195] [2020-04-17 22:57:53,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:53,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:53,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:53,762 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,924 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 22:57:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:53,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,926 INFO L225 Difference]: With dead ends: 161 [2020-04-17 22:57:53,926 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:53,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 22:57:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 22:57:53,929 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 22:57:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,930 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 22:57:53,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 22:57:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,931 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,931 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:54,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,134 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-04-17 22:57:54,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:54,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077875600] [2020-04-17 22:57:54,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,192 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 22:57:54,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077875600] [2020-04-17 22:57:54,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841703382] [2020-04-17 22:57:54,193 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 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 22:57:54,235 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:54,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:54,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:54,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,330 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 22:57:54,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145914521] [2020-04-17 22:57:54,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,332 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:54,543 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 22:57:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:54,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:54,545 INFO L225 Difference]: With dead ends: 165 [2020-04-17 22:57:54,545 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 22:57:54,545 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 22:57:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 22:57:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 22:57:54,548 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 22:57:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:54,549 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 22:57:54,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 22:57:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:54,549 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:54,549 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:54,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,750 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-04-17 22:57:54,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:54,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079332531] [2020-04-17 22:57:54,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079332531] [2020-04-17 22:57:54,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929494642] [2020-04-17 22:57:54,828 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:54,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209127933] [2020-04-17 22:57:54,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,949 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 22:57:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,142 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 22:57:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:55,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,144 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:57:55,144 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:57:55,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:57:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 22:57:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:55,149 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,149 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:55,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:55,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,150 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,354 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-04-17 22:57:55,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920335571] [2020-04-17 22:57:55,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,419 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 22:57:55,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920335571] [2020-04-17 22:57:55,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972357639] [2020-04-17 22:57:55,420 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:55,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:55,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:55,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:55,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,546 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 22:57:55,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695813923] [2020-04-17 22:57:55,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,547 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,789 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 22:57:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:55,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,791 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:57:55,791 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:57:55,792 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:57:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 22:57:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:55,796 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,796 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:55,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:55,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,797 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,998 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-04-17 22:57:55,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096554697] [2020-04-17 22:57:55,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096554697] [2020-04-17 22:57:56,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271451077] [2020-04-17 22:57:56,065 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 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 22:57:56,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:56,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:56,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:56,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567541722] [2020-04-17 22:57:56,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:56,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:56,214 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,399 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 22:57:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:56,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,400 INFO L225 Difference]: With dead ends: 160 [2020-04-17 22:57:56,401 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:56,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 22:57:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:56,406 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,407 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:56,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:56,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,408 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,612 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-04-17 22:57:56,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379268232] [2020-04-17 22:57:56,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,665 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 22:57:56,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379268232] [2020-04-17 22:57:56,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859177930] [2020-04-17 22:57:56,666 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 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 22:57:56,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:56,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:56,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:56,779 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 22:57:56,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:56,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733424659] [2020-04-17 22:57:56,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:56,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:56,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:56,780 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:57,111 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 22:57:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:57,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:57,114 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:57:57,114 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 22:57:57,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 22:57:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 22:57:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:57,119 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,119 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:57,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:57,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,120 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,323 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-04-17 22:57:57,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882703242] [2020-04-17 22:57:57,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882703242] [2020-04-17 22:57:57,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384067457] [2020-04-17 22:57:57,379 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:57:57,434 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:57,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:57,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022114444] [2020-04-17 22:57:57,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,524 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:57,761 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 22:57:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:57,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:57,763 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:57:57,763 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:57:57,764 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:57:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 22:57:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:57,766 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,766 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:57,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:57,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,767 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,968 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-04-17 22:57:57,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987590371] [2020-04-17 22:57:57,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,030 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 22:57:58,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987590371] [2020-04-17 22:57:58,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786466274] [2020-04-17 22:57:58,031 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 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 22:57:58,072 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:58,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:58,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:58,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:58,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:58,130 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 22:57:58,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:58,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:58,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243164127] [2020-04-17 22:57:58,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:58,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:58,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:58,131 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,455 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 22:57:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:58,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,457 INFO L225 Difference]: With dead ends: 192 [2020-04-17 22:57:58,457 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 22:57:58,457 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 22:57:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 22:57:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 22:57:58,461 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 22:57:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,462 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 22:57:58,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 22:57:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,462 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,664 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-04-17 22:57:58,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988509053] [2020-04-17 22:57:58,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988509053] [2020-04-17 22:57:58,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518174747] [2020-04-17 22:57:58,716 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 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 22:57:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:58,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:58,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:58,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:58,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507573883] [2020-04-17 22:57:58,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:58,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:58,819 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,124 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 22:57:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:59,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,126 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:59,126 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:59,127 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 22:57:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 22:57:59,130 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 22:57:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,130 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 22:57:59,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 22:57:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,131 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,131 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:59,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,334 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-04-17 22:57:59,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:59,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019916233] [2020-04-17 22:57:59,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019916233] [2020-04-17 22:57:59,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336638199] [2020-04-17 22:57:59,405 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 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 22:57:59,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:59,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:57:59,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276543431] [2020-04-17 22:57:59,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:57:59,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:57:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:59,557 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 22:57:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,738 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 22:57:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:59,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 22:57:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,740 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:59,740 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:59,741 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 22:57:59,744 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 22:57:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,744 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 22:57:59,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:57:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 22:57:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,745 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,745 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:59,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,947 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-04-17 22:57:59,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:59,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510354318] [2020-04-17 22:57:59,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510354318] [2020-04-17 22:58:00,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541371300] [2020-04-17 22:58:00,073 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 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 22:58:00,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:00,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331930657] [2020-04-17 22:58:00,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,236 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 22:58:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,288 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:58:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:00,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,290 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:58:00,290 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 22:58:00,291 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 22:58:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 22:58:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:58:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:58:00,294 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:58:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,294 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:58:00,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:58:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,295 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,295 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,496 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-04-17 22:58:00,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559353760] [2020-04-17 22:58:00,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559353760] [2020-04-17 22:58:00,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225072082] [2020-04-17 22:58:00,600 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 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 22:58:00,640 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:00,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667062464] [2020-04-17 22:58:00,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,741 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:58:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,833 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 22:58:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:00,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,835 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:58:00,835 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:58:00,836 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:58:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 22:58:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:58:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:58:00,838 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:58:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,839 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:58:00,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:58:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,839 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,840 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,041 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-04-17 22:58:01,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563323304] [2020-04-17 22:58:01,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563323304] [2020-04-17 22:58:01,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160935989] [2020-04-17 22:58:01,126 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 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 22:58:01,166 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:01,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:01,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:01,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:01,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639543662] [2020-04-17 22:58:01,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:01,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:01,271 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:58:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:01,359 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 22:58:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:01,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:01,361 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:58:01,361 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:58:01,362 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:58:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 22:58:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:58:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 22:58:01,365 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 22:58:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:01,366 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 22:58:01,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 22:58:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:01,366 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:01,367 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,570 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-04-17 22:58:01,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612666762] [2020-04-17 22:58:01,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612666762] [2020-04-17 22:58:01,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029230747] [2020-04-17 22:58:01,657 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 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 22:58:01,694 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:01,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:01,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:01,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:01,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790633211] [2020-04-17 22:58:01,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:01,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:01,825 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 22:58:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:01,948 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 22:58:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:01,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:01,950 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:58:01,950 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:58:01,950 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:58:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 22:58:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 22:58:01,954 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 22:58:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:01,954 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 22:58:01,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 22:58:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:01,955 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:01,955 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,159 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-04-17 22:58:02,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222879611] [2020-04-17 22:58:02,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222879611] [2020-04-17 22:58:02,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491913161] [2020-04-17 22:58:02,267 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 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 22:58:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:02,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881067035] [2020-04-17 22:58:02,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,506 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 22:58:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,691 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 22:58:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:02,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,693 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:58:02,694 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 22:58:02,694 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 22:58:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 22:58:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 22:58:02,698 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 22:58:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,699 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 22:58:02,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 22:58:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:02,700 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,700 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,903 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-04-17 22:58:02,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576253566] [2020-04-17 22:58:02,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576253566] [2020-04-17 22:58:02,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922012758] [2020-04-17 22:58:02,985 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 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 22:58:03,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:03,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506981147] [2020-04-17 22:58:03,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,128 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 22:58:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,318 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 22:58:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:03,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,320 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:03,320 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:03,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 22:58:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 22:58:03,324 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 22:58:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:03,324 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 22:58:03,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 22:58:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:03,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:03,325 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,525 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-04-17 22:58:03,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101772067] [2020-04-17 22:58:03,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,625 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 22:58:03,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101772067] [2020-04-17 22:58:03,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897081430] [2020-04-17 22:58:03,626 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 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 22:58:03,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:03,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076059056] [2020-04-17 22:58:03,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,788 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 22:58:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,837 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 22:58:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:03,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,839 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:58:03,840 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:58:03,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:58:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 22:58:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 22:58:03,843 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 22:58:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:03,843 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 22:58:03,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 22:58:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:03,843 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:03,843 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,044 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-04-17 22:58:04,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118719273] [2020-04-17 22:58:04,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,127 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 22:58:04,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118719273] [2020-04-17 22:58:04,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958045996] [2020-04-17 22:58:04,128 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 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 22:58:04,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:04,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:04,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:04,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:04,274 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 22:58:04,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:04,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:04,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980633923] [2020-04-17 22:58:04,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:04,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:04,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:04,275 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:04,405 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 22:58:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:04,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:04,407 INFO L225 Difference]: With dead ends: 172 [2020-04-17 22:58:04,407 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:04,408 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 22:58:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:04,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:04,412 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:04,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:04,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:04,413 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,616 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-04-17 22:58:04,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510962959] [2020-04-17 22:58:04,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,689 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 22:58:04,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510962959] [2020-04-17 22:58:04,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063499594] [2020-04-17 22:58:04,690 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 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 22:58:04,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:04,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:04,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:04,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:08,879 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 22:58:08,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:08,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:08,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647173954] [2020-04-17 22:58:08,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:08,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:08,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:08,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:08,880 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:09,075 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:09,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:09,078 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:09,078 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:09,078 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 22:58:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 22:58:09,082 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 22:58:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:09,083 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 22:58:09,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 22:58:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:09,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:09,083 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,286 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-04-17 22:58:09,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033778410] [2020-04-17 22:58:09,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,363 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 22:58:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033778410] [2020-04-17 22:58:09,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450883724] [2020-04-17 22:58:09,364 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 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 22:58:09,406 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:09,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:09,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:09,517 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 22:58:09,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:09,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:09,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800341348] [2020-04-17 22:58:09,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:09,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:09,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:09,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:09,518 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 22:58:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:09,704 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:09,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:09,707 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:09,707 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:09,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 22:58:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:09,711 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:09,712 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:09,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:09,712 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:09,712 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,916 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-04-17 22:58:09,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523494724] [2020-04-17 22:58:09,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,995 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 22:58:09,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523494724] [2020-04-17 22:58:09,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731819432] [2020-04-17 22:58:09,995 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:10,045 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:10,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:10,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:10,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:10,222 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 22:58:10,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:10,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:10,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353340628] [2020-04-17 22:58:10,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:10,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:10,224 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:10,508 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 22:58:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:10,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:10,511 INFO L225 Difference]: With dead ends: 184 [2020-04-17 22:58:10,511 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:58:10,512 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:58:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 22:58:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 22:58:10,516 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 22:58:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:10,516 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 22:58:10,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 22:58:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:10,517 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:10,517 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:10,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,718 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-04-17 22:58:10,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:10,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055832528] [2020-04-17 22:58:10,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,837 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 22:58:10,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055832528] [2020-04-17 22:58:10,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720013058] [2020-04-17 22:58:10,838 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 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 22:58:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:10,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:11,551 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 22:58:11,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:11,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:11,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844254959] [2020-04-17 22:58:11,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:11,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:11,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:11,552 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 22:58:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:11,755 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 22:58:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:11,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:11,757 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:11,757 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:11,757 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 22:58:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 22:58:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 22:58:11,760 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 22:58:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:11,760 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 22:58:11,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 22:58:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:11,761 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:11,761 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:11,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,965 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-04-17 22:58:11,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:11,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283737327] [2020-04-17 22:58:11,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283737327] [2020-04-17 22:58:12,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210307496] [2020-04-17 22:58:12,051 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 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 22:58:12,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:12,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:12,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:12,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:12,200 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 22:58:12,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:12,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:12,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403589684] [2020-04-17 22:58:12,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:12,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:12,201 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 22:58:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:12,360 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 22:58:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:12,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:12,362 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:12,363 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 22:58:12,363 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 22:58:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 22:58:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 22:58:12,366 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 22:58:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:12,367 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 22:58:12,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 22:58:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:12,367 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:12,367 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:12,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,568 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-04-17 22:58:12,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:12,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099059533] [2020-04-17 22:58:12,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,653 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 22:58:12,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099059533] [2020-04-17 22:58:12,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236442647] [2020-04-17 22:58:12,654 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 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 22:58:12,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:12,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:12,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:12,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:12,829 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 22:58:12,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:12,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:12,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353884574] [2020-04-17 22:58:12,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:12,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:12,831 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,024 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:13,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,026 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:13,026 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:13,026 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 22:58:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 22:58:13,030 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 22:58:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,030 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 22:58:13,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 22:58:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:13,030 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,030 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,231 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-04-17 22:58:13,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383928755] [2020-04-17 22:58:13,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,357 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 22:58:13,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383928755] [2020-04-17 22:58:13,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369208027] [2020-04-17 22:58:13,358 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 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 22:58:13,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:13,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:13,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:13,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:13,491 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 22:58:13,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:13,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:13,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034888664] [2020-04-17 22:58:13,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:13,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:13,493 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,700 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:13,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,702 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:13,702 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:13,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 22:58:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 22:58:13,708 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 22:58:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,708 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 22:58:13,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 22:58:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:13,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,709 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,914 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-04-17 22:58:13,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114252204] [2020-04-17 22:58:13,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114252204] [2020-04-17 22:58:14,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284951115] [2020-04-17 22:58:14,036 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 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 22:58:14,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:14,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:14,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:14,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,178 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 22:58:14,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517319363] [2020-04-17 22:58:14,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,179 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,248 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 22:58:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:14,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,250 INFO L225 Difference]: With dead ends: 182 [2020-04-17 22:58:14,251 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 22:58:14,251 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 22:58:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 22:58:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 22:58:14,255 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 22:58:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,255 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 22:58:14,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 22:58:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,256 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:14,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,457 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-04-17 22:58:14,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:14,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504780126] [2020-04-17 22:58:14,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504780126] [2020-04-17 22:58:14,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067059372] [2020-04-17 22:58:14,560 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 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 22:58:14,602 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:14,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:14,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:14,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,714 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 22:58:14,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679935092] [2020-04-17 22:58:14,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,716 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 22:58:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,885 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 22:58:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:14,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,887 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:14,887 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:14,888 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 22:58:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:14,892 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,892 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:14,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,893 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,893 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,096 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-04-17 22:58:15,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120743319] [2020-04-17 22:58:15,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,183 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 22:58:15,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120743319] [2020-04-17 22:58:15,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086576198] [2020-04-17 22:58:15,184 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 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 22:58:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:15,355 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 22:58:15,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:15,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:15,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410588813] [2020-04-17 22:58:15,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:15,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:15,357 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:15,573 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 22:58:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:15,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:15,575 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:58:15,575 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 22:58:15,575 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 22:58:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 22:58:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 22:58:15,578 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 22:58:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:15,579 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 22:58:15,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 22:58:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:15,579 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:15,579 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,783 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-04-17 22:58:15,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824741839] [2020-04-17 22:58:15,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,863 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 22:58:15,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824741839] [2020-04-17 22:58:15,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730344283] [2020-04-17 22:58:15,863 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 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 22:58:15,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:15,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:15,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:16,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502672194] [2020-04-17 22:58:16,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:16,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:16,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:16,005 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,248 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 22:58:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:16,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,250 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:16,250 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:16,251 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 22:58:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:16,255 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,255 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:16,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:16,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,256 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:16,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,459 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-04-17 22:58:16,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:16,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902790950] [2020-04-17 22:58:16,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:16,603 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 22:58:16,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902790950] [2020-04-17 22:58:16,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707202696] [2020-04-17 22:58:16,604 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 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 22:58:16,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:16,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:16,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:16,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,829 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 22:58:16,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:16,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224343501] [2020-04-17 22:58:16,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:16,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:16,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:16,832 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:17,167 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 22:58:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:17,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:17,169 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:17,170 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:17,170 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 22:58:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 22:58:17,176 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 22:58:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:17,176 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 22:58:17,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 22:58:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:17,178 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:17,178 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:17,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,382 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-04-17 22:58:17,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:17,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265855086] [2020-04-17 22:58:17,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,470 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 22:58:17,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265855086] [2020-04-17 22:58:17,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791428484] [2020-04-17 22:58:17,471 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 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 22:58:17,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:17,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:17,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:18,507 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 22:58:18,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:18,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:18,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238061037] [2020-04-17 22:58:18,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:18,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:18,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:18,509 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:18,763 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 22:58:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:18,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:18,765 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:18,765 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:18,765 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 22:58:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 22:58:18,769 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 22:58:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:18,769 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 22:58:18,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 22:58:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:18,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:18,770 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:18,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,971 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-04-17 22:58:18,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:18,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560637493] [2020-04-17 22:58:18,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:19,072 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 22:58:19,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560637493] [2020-04-17 22:58:19,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758397014] [2020-04-17 22:58:19,073 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 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 22:58:19,111 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:19,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:19,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:19,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:19,221 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 22:58:19,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:19,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:19,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947899466] [2020-04-17 22:58:19,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:19,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:19,223 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 22:58:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:19,328 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 22:58:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:19,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:19,330 INFO L225 Difference]: With dead ends: 178 [2020-04-17 22:58:19,330 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 22:58:19,331 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 22:58:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 22:58:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 22:58:19,334 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 22:58:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:19,335 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 22:58:19,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 22:58:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:19,335 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:19,335 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:19,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,536 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:19,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-04-17 22:58:19,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:19,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999297157] [2020-04-17 22:58:19,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:19,631 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 22:58:19,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999297157] [2020-04-17 22:58:19,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481830513] [2020-04-17 22:58:19,632 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:19,669 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:19,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:19,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:19,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:19,770 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 22:58:19,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:19,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:19,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195403507] [2020-04-17 22:58:19,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:19,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:19,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:19,771 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 22:58:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:19,957 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 22:58:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:19,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:19,959 INFO L225 Difference]: With dead ends: 193 [2020-04-17 22:58:19,959 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 22:58:19,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 22:58:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 22:58:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 22:58:19,962 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 22:58:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:19,963 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 22:58:19,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 22:58:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:19,963 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:19,963 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:20,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:20,164 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-04-17 22:58:20,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:20,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846575931] [2020-04-17 22:58:20,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:20,246 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 22:58:20,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846575931] [2020-04-17 22:58:20,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807048749] [2020-04-17 22:58:20,247 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 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 22:58:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:20,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:20,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:22,425 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 22:58:22,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:22,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:22,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016289903] [2020-04-17 22:58:22,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:22,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:22,426 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 22:58:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:22,690 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 22:58:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:22,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:22,692 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:22,693 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:22,693 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 22:58:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 22:58:22,697 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 22:58:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:22,697 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 22:58:22,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 22:58:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:22,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:22,698 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:22,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:22,899 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-04-17 22:58:22,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:22,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26444994] [2020-04-17 22:58:22,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:22,992 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 22:58:22,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26444994] [2020-04-17 22:58:22,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089886081] [2020-04-17 22:58:22,993 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 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 22:58:23,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:23,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:23,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:23,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:23,135 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 22:58:23,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:23,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:23,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161656824] [2020-04-17 22:58:23,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:23,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:23,137 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 22:58:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:23,253 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 22:58:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:23,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:23,255 INFO L225 Difference]: With dead ends: 174 [2020-04-17 22:58:23,255 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:58:23,256 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:58:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 22:58:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 22:58:23,261 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 22:58:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:23,261 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 22:58:23,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 22:58:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:23,262 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:23,262 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:23,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:23,465 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-04-17 22:58:23,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:23,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407715634] [2020-04-17 22:58:23,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:23,548 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 22:58:23,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407715634] [2020-04-17 22:58:23,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628715170] [2020-04-17 22:58:23,549 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 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 22:58:23,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:23,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:23,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:23,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:23,703 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 22:58:23,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:23,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:23,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448862691] [2020-04-17 22:58:23,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:23,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:23,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:23,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:23,705 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 22:58:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:23,927 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 22:58:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:23,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:23,929 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:23,929 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:23,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 22:58:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 22:58:23,933 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 22:58:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:23,933 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 22:58:23,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 22:58:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:23,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:23,934 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:24,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:24,135 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:24,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-04-17 22:58:24,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:24,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211904820] [2020-04-17 22:58:24,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:24,240 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 22:58:24,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211904820] [2020-04-17 22:58:24,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957309819] [2020-04-17 22:58:24,240 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 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 22:58:24,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:24,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:24,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:24,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:24,396 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 22:58:24,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:24,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:24,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9721208] [2020-04-17 22:58:24,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:24,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:24,397 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:24,532 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 22:58:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:24,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:24,534 INFO L225 Difference]: With dead ends: 175 [2020-04-17 22:58:24,534 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 22:58:24,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 22:58:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 22:58:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:24,538 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:24,538 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:24,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:24,539 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:24,539 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:24,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:24,740 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:24,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-04-17 22:58:24,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:24,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277362985] [2020-04-17 22:58:24,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:24,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277362985] [2020-04-17 22:58:24,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490595627] [2020-04-17 22:58:24,811 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 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 22:58:24,856 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:24,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:24,857 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:24,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:24,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:24,961 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 22:58:24,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:24,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:24,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831218472] [2020-04-17 22:58:24,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:24,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:24,963 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:25,281 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 22:58:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:25,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:25,283 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:25,283 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 22:58:25,284 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 22:58:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 22:58:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:25,287 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:25,288 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:25,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:25,288 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:25,288 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:25,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:25,489 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-04-17 22:58:25,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:25,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970470178] [2020-04-17 22:58:25,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:25,567 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 22:58:25,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970470178] [2020-04-17 22:58:25,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814581655] [2020-04-17 22:58:25,567 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 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 22:58:25,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:25,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:25,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:25,610 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:25,726 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 22:58:25,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:25,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:25,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118947346] [2020-04-17 22:58:25,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:25,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:25,727 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:25,959 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 22:58:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:25,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:25,961 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:25,962 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:25,962 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 22:58:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:25,966 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:25,966 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:25,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:25,967 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:25,967 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:26,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,170 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-04-17 22:58:26,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:26,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087539159] [2020-04-17 22:58:26,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:26,233 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 22:58:26,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087539159] [2020-04-17 22:58:26,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487852070] [2020-04-17 22:58:26,234 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:26,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:26,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:26,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:26,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:26,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:26,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713553770] [2020-04-17 22:58:26,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:26,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:26,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:26,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:26,394 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:27,002 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 22:58:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:27,233 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 22:58:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:27,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:27,235 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:58:27,235 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:27,236 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 22:58:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:27,239 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:27,239 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:27,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:27,240 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:27,240 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:27,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:27,441 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-04-17 22:58:27,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:27,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832951122] [2020-04-17 22:58:27,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:27,505 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 22:58:27,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832951122] [2020-04-17 22:58:27,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397145284] [2020-04-17 22:58:27,506 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 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 22:58:27,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:27,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:27,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:27,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:27,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:28,732 WARN L192 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 22:58:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:28,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:28,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:28,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902135258] [2020-04-17 22:58:28,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:28,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:28,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:28,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:58:28,734 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 22:58:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:29,063 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 22:58:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:29,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:29,065 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:29,066 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 22:58:29,066 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 22:58:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 22:58:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 22:58:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 22:58:29,070 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 22:58:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:29,070 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 22:58:29,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 22:58:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:29,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:29,071 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:29,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:29,272 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-04-17 22:58:29,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:29,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193303203] [2020-04-17 22:58:29,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:29,335 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 22:58:29,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193303203] [2020-04-17 22:58:29,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209146946] [2020-04-17 22:58:29,336 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 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 22:58:29,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:29,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:29,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:29,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:31,542 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 22:58:31,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:31,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:31,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036368916] [2020-04-17 22:58:31,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:31,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:31,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:31,544 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 22:58:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:31,836 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 22:58:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:31,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:31,838 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:31,838 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:31,838 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 22:58:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:31,842 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:31,842 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:31,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:31,843 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:31,843 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:32,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:32,044 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:32,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-04-17 22:58:32,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:32,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353066527] [2020-04-17 22:58:32,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:32,113 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 22:58:32,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353066527] [2020-04-17 22:58:32,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753901158] [2020-04-17 22:58:32,115 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 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 22:58:32,164 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:32,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:32,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:32,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:32,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:32,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:32,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091942825] [2020-04-17 22:58:32,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:32,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:32,316 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:32,700 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 22:58:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 22:58:32,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:32,702 INFO L225 Difference]: With dead ends: 209 [2020-04-17 22:58:32,702 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:32,702 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:58:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 22:58:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:32,706 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:32,706 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:32,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:32,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:32,707 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:32,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:32,910 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-04-17 22:58:32,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:32,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188332891] [2020-04-17 22:58:32,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:32,983 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 22:58:32,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188332891] [2020-04-17 22:58:32,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232267619] [2020-04-17 22:58:32,984 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 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 22:58:33,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:33,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:33,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:33,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:33,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:33,167 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 22:58:33,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:33,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:33,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969630967] [2020-04-17 22:58:33,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:33,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:33,169 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:33,745 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 22:58:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:33,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:33,747 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:33,747 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:33,747 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:58:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 22:58:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:58:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 22:58:33,752 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 22:58:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:33,752 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 22:58:33,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 22:58:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:33,753 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:33,753 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:33,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:33,957 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-04-17 22:58:33,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:33,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627455066] [2020-04-17 22:58:33,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:34,032 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 22:58:34,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627455066] [2020-04-17 22:58:34,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455616426] [2020-04-17 22:58:34,033 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 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 22:58:34,074 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:34,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:34,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:34,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:34,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:34,199 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 22:58:34,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:34,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:34,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447774905] [2020-04-17 22:58:34,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:34,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:34,200 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 22:58:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:34,791 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 22:58:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:34,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:34,793 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:58:34,793 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:58:34,793 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:58:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 22:58:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 22:58:34,797 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 22:58:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:34,797 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 22:58:34,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 22:58:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:34,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:34,797 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:34,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:34,998 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-04-17 22:58:34,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:34,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821591196] [2020-04-17 22:58:35,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:35,092 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 22:58:35,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821591196] [2020-04-17 22:58:35,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112461835] [2020-04-17 22:58:35,093 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:35,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:35,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:35,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:35,260 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 22:58:35,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:35,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:35,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93095521] [2020-04-17 22:58:35,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:35,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:35,262 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 22:58:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:35,731 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 22:58:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:35,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:35,733 INFO L225 Difference]: With dead ends: 219 [2020-04-17 22:58:35,733 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 22:58:35,734 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 22:58:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 22:58:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 22:58:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 22:58:35,738 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 22:58:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:35,738 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 22:58:35,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 22:58:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:35,739 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:35,739 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:35,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:35,942 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-04-17 22:58:35,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:35,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916064039] [2020-04-17 22:58:35,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:36,005 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 22:58:36,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916064039] [2020-04-17 22:58:36,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228922599] [2020-04-17 22:58:36,006 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 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 22:58:36,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:36,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:36,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:36,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:36,158 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 22:58:36,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:36,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:36,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709993412] [2020-04-17 22:58:36,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:36,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:36,159 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 22:58:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:36,389 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 22:58:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:36,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:36,390 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:36,391 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:36,391 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 22:58:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 22:58:36,395 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 22:58:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:36,395 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 22:58:36,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 22:58:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:36,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:36,396 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:36,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:36,599 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-04-17 22:58:36,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:36,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342212652] [2020-04-17 22:58:36,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:36,669 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 22:58:36,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342212652] [2020-04-17 22:58:36,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142062511] [2020-04-17 22:58:36,669 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 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 22:58:36,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:36,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:36,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:36,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:36,831 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 22:58:36,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:36,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:36,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135924629] [2020-04-17 22:58:36,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:36,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:36,832 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:37,072 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 22:58:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:37,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:37,074 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:37,074 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:58:37,074 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:58:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 22:58:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 22:58:37,078 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 22:58:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:37,078 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 22:58:37,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 22:58:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:37,078 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:37,079 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:37,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:37,279 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-04-17 22:58:37,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:37,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906458438] [2020-04-17 22:58:37,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:37,346 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 22:58:37,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906458438] [2020-04-17 22:58:37,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95186810] [2020-04-17 22:58:37,346 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 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 22:58:37,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:37,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:37,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:37,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:37,869 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 22:58:37,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:37,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:37,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028942514] [2020-04-17 22:58:37,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:37,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:37,870 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:38,131 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 22:58:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:38,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:38,133 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:38,133 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:38,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 22:58:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 22:58:38,137 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 22:58:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:38,137 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 22:58:38,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 22:58:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:38,138 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:38,138 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:38,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:38,342 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-04-17 22:58:38,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:38,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512933230] [2020-04-17 22:58:38,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:38,437 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 22:58:38,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512933230] [2020-04-17 22:58:38,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284933262] [2020-04-17 22:58:38,437 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 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 22:58:38,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:38,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:38,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:38,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:38,616 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 22:58:38,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:38,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:38,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597998082] [2020-04-17 22:58:38,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:38,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:38,618 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 22:58:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:39,013 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 22:58:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:58:39,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:39,015 INFO L225 Difference]: With dead ends: 214 [2020-04-17 22:58:39,015 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:39,015 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 22:58:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 22:58:39,018 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 22:58:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:39,019 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 22:58:39,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 22:58:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:39,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:39,019 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:39,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:39,223 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-04-17 22:58:39,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:39,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539217085] [2020-04-17 22:58:39,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:39,325 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 22:58:39,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539217085] [2020-04-17 22:58:39,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405951388] [2020-04-17 22:58:39,326 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 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 22:58:39,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:39,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:39,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:39,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:39,462 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 22:58:39,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:39,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:39,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54154895] [2020-04-17 22:58:39,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:39,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:39,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:39,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:39,463 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:39,818 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 22:58:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:39,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:39,820 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:39,820 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:58:39,821 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:58:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:58:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 22:58:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:39,824 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:39,824 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:39,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:39,825 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:39,825 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:40,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,026 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-04-17 22:58:40,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:40,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896788109] [2020-04-17 22:58:40,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:40,100 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 22:58:40,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896788109] [2020-04-17 22:58:40,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959858930] [2020-04-17 22:58:40,101 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 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 22:58:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:40,145 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:40,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:40,253 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 22:58:40,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:40,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:40,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627086633] [2020-04-17 22:58:40,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:40,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:40,255 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:40,608 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 22:58:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:40,608 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:40,609 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:40,609 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 22:58:40,610 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 22:58:40,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 22:58:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:40,614 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:40,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:40,614 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:40,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:40,615 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:40,615 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:40,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,815 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:40,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-04-17 22:58:40,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:40,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874828784] [2020-04-17 22:58:40,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:40,879 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 22:58:40,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874828784] [2020-04-17 22:58:40,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842538110] [2020-04-17 22:58:40,879 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 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 22:58:40,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:40,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:40,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:40,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:40,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:41,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:41,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:41,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065535360] [2020-04-17 22:58:41,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:41,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:41,004 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:41,438 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 22:58:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:41,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:41,439 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:41,439 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:58:41,440 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:58:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:58:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 22:58:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:41,443 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:41,443 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:41,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:41,444 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:41,444 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:41,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:41,644 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-04-17 22:58:41,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:41,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001189963] [2020-04-17 22:58:41,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:41,706 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 22:58:41,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001189963] [2020-04-17 22:58:41,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921032315] [2020-04-17 22:58:41,706 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 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 22:58:41,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:41,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:41,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:41,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:41,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:41,859 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 22:58:41,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:41,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:41,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050781609] [2020-04-17 22:58:41,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:41,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:41,861 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:42,351 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 22:58:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:58:42,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:42,352 INFO L225 Difference]: With dead ends: 227 [2020-04-17 22:58:42,352 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 22:58:42,353 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:58:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 22:58:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 22:58:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:42,357 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:42,357 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:42,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:42,357 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:42,357 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:42,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,558 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-04-17 22:58:42,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:42,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042590391] [2020-04-17 22:58:42,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,619 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 22:58:42,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042590391] [2020-04-17 22:58:42,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403015510] [2020-04-17 22:58:42,620 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 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 22:58:42,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:42,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:42,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:42,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:42,756 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 22:58:42,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:42,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:42,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020703683] [2020-04-17 22:58:42,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:42,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:42,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:42,758 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:43,172 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 22:58:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:58:43,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:43,173 INFO L225 Difference]: With dead ends: 221 [2020-04-17 22:58:43,173 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 22:58:43,174 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 22:58:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 22:58:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:43,177 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:43,178 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:43,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:43,178 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:43,178 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:43,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,380 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-04-17 22:58:43,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:43,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607209590] [2020-04-17 22:58:43,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:43,457 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 22:58:43,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607209590] [2020-04-17 22:58:43,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435248321] [2020-04-17 22:58:43,458 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 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 22:58:43,499 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:43,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:43,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:43,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:43,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:43,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:43,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005557331] [2020-04-17 22:58:43,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:43,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:43,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:43,581 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:44,088 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 22:58:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:44,088 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:44,089 INFO L225 Difference]: With dead ends: 240 [2020-04-17 22:58:44,089 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 22:58:44,090 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 22:58:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 22:58:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:58:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 22:58:44,093 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 22:58:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:44,094 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 22:58:44,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 22:58:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:44,094 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:44,094 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:44,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:44,295 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-04-17 22:58:44,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:44,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258554952] [2020-04-17 22:58:44,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:44,355 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 22:58:44,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258554952] [2020-04-17 22:58:44,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212381397] [2020-04-17 22:58:44,355 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:44,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:44,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:44,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:44,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:44,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:44,471 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 22:58:44,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:44,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:44,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591515637] [2020-04-17 22:58:44,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:44,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:44,473 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 22:58:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:44,998 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 22:58:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:44,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:45,000 INFO L225 Difference]: With dead ends: 238 [2020-04-17 22:58:45,001 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 22:58:45,001 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 22:58:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 22:58:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:45,004 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:45,005 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:45,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:45,005 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:45,005 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:45,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,209 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:45,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-04-17 22:58:45,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:45,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704511446] [2020-04-17 22:58:45,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,271 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 22:58:45,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704511446] [2020-04-17 22:58:45,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601972434] [2020-04-17 22:58:45,271 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 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 22:58:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:45,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:45,784 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 22:58:45,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:45,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:45,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622609749] [2020-04-17 22:58:45,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:45,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:45,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:45,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:45,785 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:46,023 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 22:58:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:46,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:46,025 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:46,025 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:46,025 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 22:58:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:46,029 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:46,029 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:46,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:46,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:46,030 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:46,030 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:46,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,233 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-04-17 22:58:46,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:46,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187794956] [2020-04-17 22:58:46,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,296 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 22:58:46,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187794956] [2020-04-17 22:58:46,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330788905] [2020-04-17 22:58:46,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:46,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:46,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:46,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:46,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:46,437 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 22:58:46,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:46,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:46,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802180972] [2020-04-17 22:58:46,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:46,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:46,438 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:46,852 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 22:58:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:46,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:46,853 INFO L225 Difference]: With dead ends: 206 [2020-04-17 22:58:46,853 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 22:58:46,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 22:58:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 22:58:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 22:58:46,857 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 22:58:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:46,857 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 22:58:46,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 22:58:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:46,858 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:46,858 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:47,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:47,059 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:47,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-04-17 22:58:47,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:47,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790786645] [2020-04-17 22:58:47,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790786645] [2020-04-17 22:58:47,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017333208] [2020-04-17 22:58:47,147 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 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 22:58:47,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:47,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:47,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:47,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:47,701 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_264 Int)) (and (<= (div (+ (* v_~j~0_264 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ c_~i~0 v_~j~0_264)) (<= c_~i~0 (+ v_~j~0_264 2)))) is different from true [2020-04-17 22:58:47,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:48,100 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 22:58:48,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:48,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:48,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183929352] [2020-04-17 22:58:48,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:48,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=148, Unknown=2, NotChecked=26, Total=240 [2020-04-17 22:58:48,101 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-04-17 22:58:49,787 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-04-17 22:58:50,503 WARN L192 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 22:58:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:53,755 INFO L93 Difference]: Finished difference Result 236 states and 561 transitions. [2020-04-17 22:58:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:53,760 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:53,761 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:58:53,761 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 22:58:53,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=341, Invalid=782, Unknown=3, NotChecked=64, Total=1190 [2020-04-17 22:58:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 22:58:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2020-04-17 22:58:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 22:58:53,765 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 22:58:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:53,765 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 22:58:53,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 22:58:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:53,766 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:53,766 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:53,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:53,966 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-04-17 22:58:53,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:53,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875024843] [2020-04-17 22:58:53,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:54,044 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 22:58:54,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875024843] [2020-04-17 22:58:54,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336886236] [2020-04-17 22:58:54,045 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 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 22:58:54,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:54,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:54,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:54,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:54,190 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 22:58:54,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:54,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:54,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880574408] [2020-04-17 22:58:54,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:54,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:54,191 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 22:58:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:54,394 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:58:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:54,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:54,395 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:58:54,395 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:58:54,396 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:58:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 22:58:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 22:58:54,399 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 22:58:54,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:54,399 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 22:58:54,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:54,399 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 22:58:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:54,400 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:54,400 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:54,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:54,603 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-04-17 22:58:54,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:54,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680575340] [2020-04-17 22:58:54,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:54,680 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 22:58:54,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680575340] [2020-04-17 22:58:54,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001499746] [2020-04-17 22:58:54,681 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 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 22:58:54,721 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:54,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:54,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:54,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:55,371 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 22:58:55,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:55,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:55,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557931053] [2020-04-17 22:58:55,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:55,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:55,372 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:55,655 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 22:58:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:55,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:55,657 INFO L225 Difference]: With dead ends: 205 [2020-04-17 22:58:55,657 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 22:58:55,657 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 22:58:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 22:58:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 22:58:55,661 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 22:58:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:55,661 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 22:58:55,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 22:58:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:55,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:55,662 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:55,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,863 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-04-17 22:58:55,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:55,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320950955] [2020-04-17 22:58:55,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,947 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 22:58:55,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320950955] [2020-04-17 22:58:55,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506343517] [2020-04-17 22:58:55,948 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 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 22:58:56,002 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:56,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:56,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:56,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:56,097 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 22:58:56,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:56,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:56,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880391268] [2020-04-17 22:58:56,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:56,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:56,099 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 22:58:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:56,350 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:58:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:56,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:56,352 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:58:56,352 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:58:56,352 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:58:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 22:58:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:58:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 22:58:56,356 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 22:58:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:56,356 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 22:58:56,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 22:58:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:56,356 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:56,356 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:56,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:56,557 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:56,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-04-17 22:58:56,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:56,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564815021] [2020-04-17 22:58:56,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:56,621 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 22:58:56,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564815021] [2020-04-17 22:58:56,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402158305] [2020-04-17 22:58:56,622 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:56,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:56,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:56,767 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 22:58:56,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:56,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:56,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353735590] [2020-04-17 22:58:56,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:56,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:56,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:56,769 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 22:58:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:56,984 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:58:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:56,984 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:56,985 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:58:56,985 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:58:56,986 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:58:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 22:58:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 22:58:56,989 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 22:58:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:56,989 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 22:58:56,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 22:58:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:56,990 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:56,990 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:57,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:57,191 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-04-17 22:58:57,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:57,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51636660] [2020-04-17 22:58:57,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:57,257 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 22:58:57,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51636660] [2020-04-17 22:58:57,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528760116] [2020-04-17 22:58:57,257 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 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 22:58:57,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:57,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:57,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:57,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:58,283 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 22:58:58,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:58,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:58,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496123891] [2020-04-17 22:58:58,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:58,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:58,284 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:58,627 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 22:58:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:58,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:58,629 INFO L225 Difference]: With dead ends: 209 [2020-04-17 22:58:58,629 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:58,629 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:58:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 22:58:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 22:58:58,634 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 22:58:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:58,634 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 22:58:58,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 22:58:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:58,635 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:58,635 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:58,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:58,835 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-04-17 22:58:58,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:58,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059423238] [2020-04-17 22:58:58,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:58,898 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 22:58:58,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059423238] [2020-04-17 22:58:58,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485480786] [2020-04-17 22:58:58,899 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 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 22:58:58,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:58,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:58,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:58,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:59,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:59,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:59,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428555144] [2020-04-17 22:58:59,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:59,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:59,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:59,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:59,042 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:59,312 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 22:58:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:59,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:59,313 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:59,314 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:58:59,314 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:58:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 22:58:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 22:58:59,317 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 22:58:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:59,318 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 22:58:59,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 22:58:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:59,318 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:59,318 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:59,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:59,519 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-04-17 22:58:59,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:59,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763247483] [2020-04-17 22:58:59,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:59,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763247483] [2020-04-17 22:58:59,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067925853] [2020-04-17 22:58:59,585 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 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 22:58:59,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:59,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:59,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:59,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:59,739 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 22:58:59,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:59,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:59,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700105907] [2020-04-17 22:58:59,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:59,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:59,740 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 22:58:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:59,994 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:58:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:59,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:59,995 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:58:59,995 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:58:59,995 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:58:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 22:58:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:59:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 22:59:00,000 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 22:59:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:00,000 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 22:59:00,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 22:59:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:00,001 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:00,001 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:00,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:00,204 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-04-17 22:59:00,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:00,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001185625] [2020-04-17 22:59:00,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:00,283 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 22:59:00,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001185625] [2020-04-17 22:59:00,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041346211] [2020-04-17 22:59:00,284 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 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 22:59:00,323 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:00,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:00,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:00,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:00,428 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 22:59:00,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:00,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:00,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471888789] [2020-04-17 22:59:00,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:00,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:00,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:00,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:00,429 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 22:59:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:00,802 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 22:59:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:59:00,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:00,803 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:00,804 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:00,804 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:59:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 22:59:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:00,808 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:00,809 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:00,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:00,809 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:00,809 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:01,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:01,012 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-04-17 22:59:01,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:01,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250247533] [2020-04-17 22:59:01,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:01,076 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 22:59:01,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250247533] [2020-04-17 22:59:01,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471697394] [2020-04-17 22:59:01,077 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 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 22:59:01,119 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:01,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:01,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:01,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:01,206 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 22:59:01,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:01,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:01,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249831762] [2020-04-17 22:59:01,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:01,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:01,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:01,208 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:01,524 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 22:59:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:59:01,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:01,525 INFO L225 Difference]: With dead ends: 196 [2020-04-17 22:59:01,526 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 22:59:01,527 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:01,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 22:59:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 22:59:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:01,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:01,530 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:01,530 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:01,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:01,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:01,531 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:01,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:01,734 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-04-17 22:59:01,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:01,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897236746] [2020-04-17 22:59:01,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:01,810 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 22:59:01,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897236746] [2020-04-17 22:59:01,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503281849] [2020-04-17 22:59:01,811 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 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 22:59:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:01,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:01,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:01,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:01,929 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 22:59:01,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:01,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:01,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389113570] [2020-04-17 22:59:01,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:01,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:01,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:01,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:01,931 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:02,184 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 22:59:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:02,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:02,185 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:59:02,185 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 22:59:02,185 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 22:59:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 22:59:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:02,189 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:02,190 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:02,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:02,190 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:02,190 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:02,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:02,395 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:02,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-04-17 22:59:02,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:02,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029203802] [2020-04-17 22:59:02,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:02,483 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 22:59:02,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029203802] [2020-04-17 22:59:02,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144727268] [2020-04-17 22:59:02,484 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 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 22:59:02,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:02,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:02,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:02,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:02,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:02,661 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 22:59:02,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:02,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:02,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914017232] [2020-04-17 22:59:02,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:02,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:02,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:02,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:02,663 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:03,121 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 22:59:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:03,121 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:03,122 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:03,122 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 22:59:03,123 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 22:59:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 22:59:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:03,126 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:03,126 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:03,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:03,126 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:03,126 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:03,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:03,327 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:03,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-04-17 22:59:03,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:03,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699080967] [2020-04-17 22:59:03,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:03,396 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 22:59:03,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699080967] [2020-04-17 22:59:03,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13366396] [2020-04-17 22:59:03,397 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 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 22:59:03,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:03,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:03,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:03,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:03,542 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 22:59:03,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:03,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:03,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877817699] [2020-04-17 22:59:03,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:03,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:03,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:03,543 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:03,990 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 22:59:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:59:03,990 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:03,991 INFO L225 Difference]: With dead ends: 222 [2020-04-17 22:59:03,991 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 22:59:03,992 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 22:59:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 22:59:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:03,996 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:03,996 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:03,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:03,996 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:03,996 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:04,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:04,197 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-04-17 22:59:04,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:04,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256114779] [2020-04-17 22:59:04,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:04,265 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 22:59:04,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256114779] [2020-04-17 22:59:04,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688215994] [2020-04-17 22:59:04,266 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 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 22:59:04,314 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:04,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:04,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:04,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:04,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:04,611 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 22:59:04,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:04,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:04,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579229510] [2020-04-17 22:59:04,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:04,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:04,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:04,612 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:05,025 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-04-17 22:59:05,255 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-04-17 22:59:05,805 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-04-17 22:59:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:05,988 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 22:59:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:05,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:05,990 INFO L225 Difference]: With dead ends: 254 [2020-04-17 22:59:05,990 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 22:59:05,990 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 22:59:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 22:59:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:59:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 22:59:05,995 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 22:59:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:05,995 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 22:59:05,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 22:59:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:05,996 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:05,996 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:06,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:06,199 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-04-17 22:59:06,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:06,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078973012] [2020-04-17 22:59:06,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:06,261 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 22:59:06,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078973012] [2020-04-17 22:59:06,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198953579] [2020-04-17 22:59:06,262 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 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 22:59:06,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:06,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:06,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:06,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:06,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:06,871 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 22:59:06,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:06,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:59:06,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403288045] [2020-04-17 22:59:06,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:59:06,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:59:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:59:06,873 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 22:59:08,156 WARN L192 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 22:59:10,644 WARN L192 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 22:59:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:16,300 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-04-17 22:59:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 22:59:16,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:59:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:16,302 INFO L225 Difference]: With dead ends: 256 [2020-04-17 22:59:16,302 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 22:59:16,302 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=452, Invalid=1101, Unknown=7, NotChecked=0, Total=1560 [2020-04-17 22:59:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 22:59:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 139. [2020-04-17 22:59:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 22:59:16,306 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 22:59:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:16,306 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 22:59:16,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:59:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 22:59:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:16,307 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:16,307 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:16,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:16,510 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-04-17 22:59:16,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:16,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627593438] [2020-04-17 22:59:16,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:16,571 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 22:59:16,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627593438] [2020-04-17 22:59:16,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137633960] [2020-04-17 22:59:16,571 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 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 22:59:16,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:16,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:16,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:16,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:16,704 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 22:59:16,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:16,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:16,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401127581] [2020-04-17 22:59:16,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:16,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:16,706 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 22:59:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:17,031 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 22:59:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:59:17,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:17,032 INFO L225 Difference]: With dead ends: 208 [2020-04-17 22:59:17,032 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:59:17,033 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:59:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 22:59:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:59:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 22:59:17,036 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 22:59:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:17,036 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 22:59:17,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 22:59:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:17,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:17,037 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:17,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:17,237 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-04-17 22:59:17,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:17,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659033359] [2020-04-17 22:59:17,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:17,313 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 22:59:17,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659033359] [2020-04-17 22:59:17,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373239685] [2020-04-17 22:59:17,313 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 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 22:59:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:17,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:17,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:17,466 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 22:59:17,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:17,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:17,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218163075] [2020-04-17 22:59:17,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:17,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:17,467 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 22:59:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:17,919 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 22:59:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:17,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:17,921 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:17,921 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:17,921 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:59:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 22:59:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:17,924 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:17,925 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:17,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:17,925 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:17,925 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:18,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:18,126 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-04-17 22:59:18,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:18,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036840197] [2020-04-17 22:59:18,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:18,192 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 22:59:18,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036840197] [2020-04-17 22:59:18,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657119424] [2020-04-17 22:59:18,193 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 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 22:59:18,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:18,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:18,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:18,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:18,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:18,347 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 22:59:18,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:18,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:18,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048046081] [2020-04-17 22:59:18,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:18,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:18,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:18,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:18,348 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:18,809 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 22:59:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:18,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:18,810 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:59:18,810 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:59:18,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:59:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 22:59:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:18,815 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:18,815 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:18,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:18,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:18,815 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:19,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,016 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-04-17 22:59:19,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:19,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505530949] [2020-04-17 22:59:19,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:19,078 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 22:59:19,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505530949] [2020-04-17 22:59:19,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178705893] [2020-04-17 22:59:19,079 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 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 22:59:19,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:19,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:19,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:19,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:19,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:19,211 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 22:59:19,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:19,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:19,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417883710] [2020-04-17 22:59:19,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:19,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:19,213 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:19,715 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 22:59:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:19,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:19,717 INFO L225 Difference]: With dead ends: 241 [2020-04-17 22:59:19,717 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 22:59:19,717 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 22:59:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 22:59:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 22:59:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 22:59:19,721 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 22:59:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:19,721 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 22:59:19,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 22:59:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:19,722 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:19,722 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:19,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,922 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:19,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-04-17 22:59:19,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:19,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833219370] [2020-04-17 22:59:19,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:19,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833219370] [2020-04-17 22:59:19,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622322654] [2020-04-17 22:59:19,985 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 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 22:59:20,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:20,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:20,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:20,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:20,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:20,113 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 22:59:20,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:20,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:20,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132434960] [2020-04-17 22:59:20,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:20,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:20,114 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 22:59:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:20,606 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 22:59:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:59:20,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:20,609 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:20,609 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 22:59:20,609 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:59:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 22:59:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 22:59:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:59:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 22:59:20,613 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 22:59:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:20,613 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 22:59:20,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 22:59:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:20,614 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:20,614 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:20,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:20,818 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:20,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-04-17 22:59:20,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:20,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240377012] [2020-04-17 22:59:20,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240377012] [2020-04-17 22:59:20,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368399804] [2020-04-17 22:59:20,901 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:20,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 22:59:20,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:20,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:20,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:21,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:21,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:21,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 22:59:21,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871814497] [2020-04-17 22:59:21,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:59:21,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:59:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:59:21,105 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-04-17 22:59:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:21,405 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-04-17 22:59:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:59:21,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-04-17 22:59:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:21,407 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:59:21,408 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 22:59:21,408 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 22:59:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-04-17 22:59:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 22:59:21,412 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 22:59:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:21,413 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 22:59:21,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 22:59:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 22:59:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:21,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:21,414 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:21,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:21,618 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-04-17 22:59:21,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:21,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783632842] [2020-04-17 22:59:21,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:21,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783632842] [2020-04-17 22:59:21,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392456204] [2020-04-17 22:59:21,813 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 22:59:21,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:21,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:21,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:21,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:22,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:22,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:22,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998591681] [2020-04-17 22:59:22,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:22,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:22,081 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-04-17 22:59:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:22,131 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-04-17 22:59:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:22,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:22,132 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:59:22,132 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:59:22,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:59:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-04-17 22:59:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:59:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 22:59:22,136 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 22:59:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:22,136 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 22:59:22,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 22:59:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:22,136 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:22,137 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:22,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:22,340 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:22,340 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-04-17 22:59:22,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:22,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204884655] [2020-04-17 22:59:22,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:22,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204884655] [2020-04-17 22:59:22,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190147033] [2020-04-17 22:59:22,463 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 22:59:22,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:22,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:22,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:22,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:22,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:22,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:22,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812939995] [2020-04-17 22:59:22,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:22,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:22,626 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 22:59:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:22,714 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-04-17 22:59:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:22,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:22,716 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:59:22,716 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 22:59:22,716 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:59:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 22:59:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-04-17 22:59:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:59:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 22:59:22,719 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 22:59:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:22,719 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 22:59:22,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 22:59:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:22,720 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:22,720 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:22,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:22,921 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-04-17 22:59:22,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:22,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276506710] [2020-04-17 22:59:22,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:23,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276506710] [2020-04-17 22:59:23,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114653258] [2020-04-17 22:59:23,034 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 22:59:23,073 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 22:59:23,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:23,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:23,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:23,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:23,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:23,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582087964] [2020-04-17 22:59:23,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:23,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:23,192 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 22:59:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:23,281 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-04-17 22:59:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:59:23,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:23,282 INFO L225 Difference]: With dead ends: 196 [2020-04-17 22:59:23,282 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:59:23,283 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:59:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:59:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-04-17 22:59:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-04-17 22:59:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-04-17 22:59:23,286 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-04-17 22:59:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:23,286 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-04-17 22:59:23,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-04-17 22:59:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:23,286 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:23,286 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:23,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:23,487 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:23,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-04-17 22:59:23,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:23,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008820957] [2020-04-17 22:59:23,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:23,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008820957] [2020-04-17 22:59:23,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049884403] [2020-04-17 22:59:23,585 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 22:59:23,629 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 22:59:23,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:23,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:23,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:23,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:23,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:23,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667841092] [2020-04-17 22:59:23,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:23,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:23,755 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-04-17 22:59:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:23,882 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 22:59:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:23,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:23,884 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:59:23,884 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:59:23,884 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:59:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:59:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-04-17 22:59:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-04-17 22:59:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-04-17 22:59:23,888 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-04-17 22:59:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:23,889 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-04-17 22:59:23,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-04-17 22:59:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:23,889 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:23,889 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:24,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:24,093 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-04-17 22:59:24,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:24,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863197452] [2020-04-17 22:59:24,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:24,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863197452] [2020-04-17 22:59:24,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017762113] [2020-04-17 22:59:24,183 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 22:59:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:24,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:24,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:24,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:24,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:24,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678559396] [2020-04-17 22:59:24,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:24,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:24,335 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-04-17 22:59:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:24,489 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-04-17 22:59:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:24,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:24,490 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:59:24,490 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 22:59:24,490 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:59:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 22:59:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-04-17 22:59:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-04-17 22:59:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-04-17 22:59:24,494 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-04-17 22:59:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:24,494 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-04-17 22:59:24,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-04-17 22:59:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:24,495 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:24,495 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:24,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:24,696 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-04-17 22:59:24,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:24,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612108820] [2020-04-17 22:59:24,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:24,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612108820] [2020-04-17 22:59:24,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925184849] [2020-04-17 22:59:24,791 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 22:59:24,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:24,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:24,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:24,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:24,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:24,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:24,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110345562] [2020-04-17 22:59:24,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:24,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:24,963 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-04-17 22:59:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:25,139 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-04-17 22:59:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:25,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:25,140 INFO L225 Difference]: With dead ends: 193 [2020-04-17 22:59:25,140 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 22:59:25,140 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 22:59:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-04-17 22:59:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 22:59:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-04-17 22:59:25,144 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-04-17 22:59:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:25,144 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-04-17 22:59:25,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-04-17 22:59:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:25,144 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:25,145 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:25,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:25,345 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:25,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-04-17 22:59:25,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:25,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281041961] [2020-04-17 22:59:25,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281041961] [2020-04-17 22:59:25,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933351964] [2020-04-17 22:59:25,420 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 22:59:25,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:25,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:25,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:25,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:25,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:25,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:25,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060321135] [2020-04-17 22:59:25,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:25,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:25,595 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-04-17 22:59:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:25,809 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 22:59:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:59:25,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:25,810 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:59:25,811 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:59:25,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:59:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-04-17 22:59:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-04-17 22:59:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-04-17 22:59:25,815 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-04-17 22:59:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:25,815 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-04-17 22:59:25,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-04-17 22:59:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:25,816 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:25,816 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:26,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:26,020 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-04-17 22:59:26,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:26,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167717253] [2020-04-17 22:59:26,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167717253] [2020-04-17 22:59:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673518192] [2020-04-17 22:59:26,110 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 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 22:59:26,152 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:26,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:26,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:26,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:26,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:26,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934526401] [2020-04-17 22:59:26,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:26,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:26,273 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-04-17 22:59:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:26,327 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-04-17 22:59:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:26,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:26,328 INFO L225 Difference]: With dead ends: 188 [2020-04-17 22:59:26,328 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 22:59:26,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 22:59:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-04-17 22:59:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 22:59:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-04-17 22:59:26,332 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-04-17 22:59:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:26,332 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-04-17 22:59:26,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-04-17 22:59:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:26,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:26,333 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:26,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:26,534 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-04-17 22:59:26,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:26,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807961251] [2020-04-17 22:59:26,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807961251] [2020-04-17 22:59:26,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614236398] [2020-04-17 22:59:26,623 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 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 22:59:26,666 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:26,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:26,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:26,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:26,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:26,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026890767] [2020-04-17 22:59:26,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:26,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:26,799 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-04-17 22:59:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:26,978 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-04-17 22:59:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:26,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:26,979 INFO L225 Difference]: With dead ends: 199 [2020-04-17 22:59:26,980 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 22:59:26,980 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 22:59:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-04-17 22:59:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 22:59:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 22:59:26,989 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 22:59:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:26,989 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 22:59:26,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 22:59:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:26,989 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:26,990 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:27,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:27,190 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-04-17 22:59:27,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:27,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199834120] [2020-04-17 22:59:27,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:27,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199834120] [2020-04-17 22:59:27,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180172171] [2020-04-17 22:59:27,284 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 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 22:59:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:27,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:27,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:33,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:33,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:33,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502219851] [2020-04-17 22:59:33,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:33,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=184, Unknown=1, NotChecked=0, Total=272 [2020-04-17 22:59:33,121 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 22:59:33,573 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 22:59:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:33,706 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-04-17 22:59:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:59:33,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:33,708 INFO L225 Difference]: With dead ends: 210 [2020-04-17 22:59:33,708 INFO L226 Difference]: Without dead ends: 208 [2020-04-17 22:59:33,708 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=172, Invalid=333, Unknown=1, NotChecked=0, Total=506 [2020-04-17 22:59:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-04-17 22:59:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-04-17 22:59:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-04-17 22:59:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-04-17 22:59:33,711 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-04-17 22:59:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:33,712 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-04-17 22:59:33,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-04-17 22:59:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:33,712 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:33,712 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:33,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:33,913 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-04-17 22:59:33,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:33,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853985215] [2020-04-17 22:59:33,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:34,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853985215] [2020-04-17 22:59:34,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889720799] [2020-04-17 22:59:34,002 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 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 22:59:34,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:34,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:34,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:34,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:35,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:35,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:35,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21038659] [2020-04-17 22:59:35,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:35,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:35,218 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-04-17 22:59:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:35,514 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-04-17 22:59:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:35,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:35,516 INFO L225 Difference]: With dead ends: 210 [2020-04-17 22:59:35,516 INFO L226 Difference]: Without dead ends: 208 [2020-04-17 22:59:35,516 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-04-17 22:59:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-04-17 22:59:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 22:59:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 22:59:35,520 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 22:59:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:35,520 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 22:59:35,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 22:59:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:35,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:35,520 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:35,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:35,721 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-04-17 22:59:35,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:35,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605404765] [2020-04-17 22:59:35,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:35,828 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 22:59:35,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605404765] [2020-04-17 22:59:35,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464025099] [2020-04-17 22:59:35,829 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 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 22:59:35,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:59:35,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:35,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:35,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:36,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:36,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:36,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236532589] [2020-04-17 22:59:36,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:36,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:36,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:36,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:36,033 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 22:59:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:36,309 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-04-17 22:59:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:36,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:36,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:36,310 INFO L225 Difference]: With dead ends: 218 [2020-04-17 22:59:36,310 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 22:59:36,310 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 22:59:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 22:59:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:36,314 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:36,314 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:36,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:36,315 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:36,315 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:36,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:36,515 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-04-17 22:59:36,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:36,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688414496] [2020-04-17 22:59:36,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:36,599 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 22:59:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688414496] [2020-04-17 22:59:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804028058] [2020-04-17 22:59:36,600 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 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 22:59:36,638 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:36,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:36,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:36,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:36,781 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 22:59:36,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:36,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:36,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800939450] [2020-04-17 22:59:36,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:36,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:36,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:36,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:36,783 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:37,065 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-04-17 22:59:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:37,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:37,066 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:59:37,066 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 22:59:37,067 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 22:59:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-04-17 22:59:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 22:59:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-04-17 22:59:37,070 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-04-17 22:59:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:37,070 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-04-17 22:59:37,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-04-17 22:59:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:37,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:37,071 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:37,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:37,271 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-04-17 22:59:37,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:37,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229433200] [2020-04-17 22:59:37,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229433200] [2020-04-17 22:59:37,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766485487] [2020-04-17 22:59:37,357 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 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 22:59:37,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:37,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:37,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:37,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:37,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:37,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:37,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318708112] [2020-04-17 22:59:37,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:37,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:37,521 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-04-17 22:59:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:37,787 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 22:59:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:37,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:37,788 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:59:37,789 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 22:59:37,789 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 22:59:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-04-17 22:59:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:37,793 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:37,793 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:37,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:37,794 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:37,794 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:37,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:37,997 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-04-17 22:59:37,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:37,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995953400] [2020-04-17 22:59:37,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:38,082 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 22:59:38,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995953400] [2020-04-17 22:59:38,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231610454] [2020-04-17 22:59:38,082 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:59:38,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:59:38,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:38,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:38,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:38,795 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 22:59:38,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:38,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:38,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549001554] [2020-04-17 22:59:38,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:38,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:38,796 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:39,074 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-04-17 22:59:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:39,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:39,075 INFO L225 Difference]: With dead ends: 224 [2020-04-17 22:59:39,075 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 22:59:39,076 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 22:59:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-04-17 22:59:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:39,080 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:39,080 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:39,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:39,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:39,081 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:39,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:39,285 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:39,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:39,285 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-04-17 22:59:39,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:39,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483706394] [2020-04-17 22:59:39,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:39,391 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 22:59:39,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483706394] [2020-04-17 22:59:39,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320524221] [2020-04-17 22:59:39,392 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 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 22:59:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:39,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:39,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:39,698 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 22:59:39,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:39,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:39,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664216104] [2020-04-17 22:59:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:39,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:39,699 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:40,058 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-04-17 22:59:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:40,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:40,060 INFO L225 Difference]: With dead ends: 218 [2020-04-17 22:59:40,060 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 22:59:40,060 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 22:59:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 22:59:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:40,065 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:40,066 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:40,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:40,067 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:40,067 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:40,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:40,272 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-04-17 22:59:40,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:40,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505475815] [2020-04-17 22:59:40,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505475815] [2020-04-17 22:59:40,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738037329] [2020-04-17 22:59:40,375 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 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 22:59:40,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:40,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:40,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:40,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:40,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:40,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970254624] [2020-04-17 22:59:40,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:40,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:40,579 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:40,825 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-04-17 22:59:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:40,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:40,828 INFO L225 Difference]: With dead ends: 206 [2020-04-17 22:59:40,828 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 22:59:40,829 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 22:59:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-04-17 22:59:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 22:59:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-04-17 22:59:40,833 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-04-17 22:59:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:40,833 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-04-17 22:59:40,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-04-17 22:59:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:40,834 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:40,834 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:41,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:41,037 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-04-17 22:59:41,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:41,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151053160] [2020-04-17 22:59:41,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:41,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151053160] [2020-04-17 22:59:41,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646082095] [2020-04-17 22:59:41,135 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 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 22:59:41,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:41,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:41,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:41,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:41,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:41,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:41,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910723082] [2020-04-17 22:59:41,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:41,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:41,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:41,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:41,295 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-04-17 22:59:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:41,519 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-04-17 22:59:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:41,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:41,521 INFO L225 Difference]: With dead ends: 207 [2020-04-17 22:59:41,521 INFO L226 Difference]: Without dead ends: 205 [2020-04-17 22:59:41,521 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-04-17 22:59:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-04-17 22:59:41,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 22:59:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-04-17 22:59:41,524 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-04-17 22:59:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:41,524 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-04-17 22:59:41,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-04-17 22:59:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:41,525 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:41,525 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:41,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:41,726 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-04-17 22:59:41,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:41,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262327977] [2020-04-17 22:59:41,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:41,821 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 22:59:41,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262327977] [2020-04-17 22:59:41,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295155310] [2020-04-17 22:59:41,822 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 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 22:59:41,860 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:41,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:41,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:41,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:43,186 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 22:59:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:43,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:43,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038280395] [2020-04-17 22:59:43,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:43,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:43,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:43,188 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-04-17 22:59:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:43,421 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-04-17 22:59:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:43,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:43,422 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:59:43,423 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:59:43,423 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:59:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-04-17 22:59:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 22:59:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-04-17 22:59:43,426 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-04-17 22:59:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:43,427 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-04-17 22:59:43,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-04-17 22:59:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:43,427 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:43,427 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:43,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:43,628 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-04-17 22:59:43,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:43,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987328212] [2020-04-17 22:59:43,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:43,720 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 22:59:43,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987328212] [2020-04-17 22:59:43,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546779857] [2020-04-17 22:59:43,721 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 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 22:59:43,764 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:43,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:43,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:43,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:54,003 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 22:59:54,004 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 22:59:54,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:54,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 22:59:54,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000578079] [2020-04-17 22:59:54,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:59:54,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:54,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:59:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=210, Unknown=4, NotChecked=0, Total=306 [2020-04-17 22:59:54,006 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 18 states. [2020-04-17 22:59:54,811 WARN L192 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-04-17 22:59:56,910 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 22:59:59,091 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:00:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:12,750 INFO L93 Difference]: Finished difference Result 231 states and 546 transitions. [2020-04-17 23:00:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:12,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:12,752 INFO L225 Difference]: With dead ends: 231 [2020-04-17 23:00:12,752 INFO L226 Difference]: Without dead ends: 229 [2020-04-17 23:00:12,752 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=216, Invalid=430, Unknown=4, NotChecked=0, Total=650 [2020-04-17 23:00:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-04-17 23:00:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 170. [2020-04-17 23:00:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-04-17 23:00:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 429 transitions. [2020-04-17 23:00:12,756 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 429 transitions. Word has length 14 [2020-04-17 23:00:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:12,757 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 429 transitions. [2020-04-17 23:00:12,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 429 transitions. [2020-04-17 23:00:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:12,757 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:12,757 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:12,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:12,960 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-04-17 23:00:12,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:12,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201098413] [2020-04-17 23:00:12,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:13,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201098413] [2020-04-17 23:00:13,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343399558] [2020-04-17 23:00:13,052 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 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 23:00:13,095 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:13,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:13,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:13,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:13,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:13,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:13,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041527550] [2020-04-17 23:00:13,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:13,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:13,220 INFO L87 Difference]: Start difference. First operand 170 states and 429 transitions. Second operand 17 states. [2020-04-17 23:00:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:13,476 INFO L93 Difference]: Finished difference Result 233 states and 551 transitions. [2020-04-17 23:00:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:13,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:13,477 INFO L225 Difference]: With dead ends: 233 [2020-04-17 23:00:13,477 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 23:00:13,478 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 23:00:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 168. [2020-04-17 23:00:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-04-17 23:00:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 426 transitions. [2020-04-17 23:00:13,481 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 426 transitions. Word has length 14 [2020-04-17 23:00:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:13,481 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 426 transitions. [2020-04-17 23:00:13,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:13,481 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 426 transitions. [2020-04-17 23:00:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:13,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:13,482 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:13,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:13,683 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-04-17 23:00:13,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:13,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206278768] [2020-04-17 23:00:13,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:13,786 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 23:00:13,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206278768] [2020-04-17 23:00:13,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366272237] [2020-04-17 23:00:13,787 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 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 23:00:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:13,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:13,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:13,970 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 23:00:13,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:13,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:13,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972094830] [2020-04-17 23:00:13,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:13,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:13,971 INFO L87 Difference]: Start difference. First operand 168 states and 426 transitions. Second operand 17 states. [2020-04-17 23:00:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:14,202 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 23:00:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:00:14,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:14,203 INFO L225 Difference]: With dead ends: 219 [2020-04-17 23:00:14,204 INFO L226 Difference]: Without dead ends: 217 [2020-04-17 23:00:14,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-04-17 23:00:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-04-17 23:00:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-04-17 23:00:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 423 transitions. [2020-04-17 23:00:14,208 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 423 transitions. Word has length 14 [2020-04-17 23:00:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:14,209 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 423 transitions. [2020-04-17 23:00:14,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 423 transitions. [2020-04-17 23:00:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:14,209 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:14,209 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:14,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:14,412 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-04-17 23:00:14,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:14,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83383969] [2020-04-17 23:00:14,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:14,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83383969] [2020-04-17 23:00:14,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112475350] [2020-04-17 23:00:14,529 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 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 23:00:14,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:14,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:14,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:14,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:14,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:14,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:14,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421403915] [2020-04-17 23:00:14,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:14,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:14,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:14,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:14,707 INFO L87 Difference]: Start difference. First operand 167 states and 423 transitions. Second operand 17 states. [2020-04-17 23:00:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:14,898 INFO L93 Difference]: Finished difference Result 212 states and 509 transitions. [2020-04-17 23:00:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:00:14,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:14,900 INFO L225 Difference]: With dead ends: 212 [2020-04-17 23:00:14,900 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 23:00:14,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:00:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 23:00:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 167. [2020-04-17 23:00:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-04-17 23:00:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 422 transitions. [2020-04-17 23:00:14,904 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 422 transitions. Word has length 14 [2020-04-17 23:00:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:14,904 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 422 transitions. [2020-04-17 23:00:14,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 422 transitions. [2020-04-17 23:00:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:14,904 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:14,905 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:15,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:15,105 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:15,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-04-17 23:00:15,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:15,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477442340] [2020-04-17 23:00:15,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:15,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477442340] [2020-04-17 23:00:15,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975564674] [2020-04-17 23:00:15,229 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 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 23:00:15,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:15,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:15,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:15,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:15,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:15,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:15,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920698184] [2020-04-17 23:00:15,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:15,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:15,401 INFO L87 Difference]: Start difference. First operand 167 states and 422 transitions. Second operand 17 states. [2020-04-17 23:00:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:15,476 INFO L93 Difference]: Finished difference Result 219 states and 523 transitions. [2020-04-17 23:00:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:00:15,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:15,477 INFO L225 Difference]: With dead ends: 219 [2020-04-17 23:00:15,477 INFO L226 Difference]: Without dead ends: 217 [2020-04-17 23:00:15,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:00:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-04-17 23:00:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2020-04-17 23:00:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-04-17 23:00:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 446 transitions. [2020-04-17 23:00:15,481 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 446 transitions. Word has length 14 [2020-04-17 23:00:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:15,481 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 446 transitions. [2020-04-17 23:00:15,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 446 transitions. [2020-04-17 23:00:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:15,481 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:15,481 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:15,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:15,682 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-04-17 23:00:15,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:15,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075006283] [2020-04-17 23:00:15,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075006283] [2020-04-17 23:00:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834548648] [2020-04-17 23:00:15,801 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 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 23:00:15,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:15,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:15,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:15,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:15,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:15,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:15,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068268676] [2020-04-17 23:00:15,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:15,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:15,979 INFO L87 Difference]: Start difference. First operand 175 states and 446 transitions. Second operand 17 states. [2020-04-17 23:00:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:16,192 INFO L93 Difference]: Finished difference Result 225 states and 535 transitions. [2020-04-17 23:00:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:16,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:16,194 INFO L225 Difference]: With dead ends: 225 [2020-04-17 23:00:16,194 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 23:00:16,194 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:00:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 23:00:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 173. [2020-04-17 23:00:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-04-17 23:00:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 440 transitions. [2020-04-17 23:00:16,198 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 440 transitions. Word has length 14 [2020-04-17 23:00:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:16,198 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 440 transitions. [2020-04-17 23:00:16,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 440 transitions. [2020-04-17 23:00:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:16,198 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:16,198 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:16,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:16,399 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-04-17 23:00:16,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:16,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11715430] [2020-04-17 23:00:16,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:16,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11715430] [2020-04-17 23:00:16,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798465010] [2020-04-17 23:00:16,553 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:00:16,616 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:16,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:16,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:16,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:17,888 WARN L192 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-04-17 23:00:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:17,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:17,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:17,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85741342] [2020-04-17 23:00:17,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:17,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:17,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:17,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-04-17 23:00:17,908 INFO L87 Difference]: Start difference. First operand 173 states and 440 transitions. Second operand 17 states. [2020-04-17 23:00:18,359 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:00:18,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:18,558 INFO L93 Difference]: Finished difference Result 233 states and 549 transitions. [2020-04-17 23:00:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:18,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:18,559 INFO L225 Difference]: With dead ends: 233 [2020-04-17 23:00:18,559 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 23:00:18,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=178, Invalid=373, Unknown=1, NotChecked=0, Total=552 [2020-04-17 23:00:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 23:00:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 171. [2020-04-17 23:00:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 23:00:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 434 transitions. [2020-04-17 23:00:18,563 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 434 transitions. Word has length 14 [2020-04-17 23:00:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:18,563 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 434 transitions. [2020-04-17 23:00:18,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 434 transitions. [2020-04-17 23:00:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:18,564 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:18,564 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:18,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:18,765 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:18,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-04-17 23:00:18,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:18,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300746931] [2020-04-17 23:00:18,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:18,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300746931] [2020-04-17 23:00:18,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862415952] [2020-04-17 23:00:18,884 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 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 23:00:18,928 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:18,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:18,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:18,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:20,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:20,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:20,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112199392] [2020-04-17 23:00:20,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:20,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:20,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:20,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=219, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:00:20,818 INFO L87 Difference]: Start difference. First operand 171 states and 434 transitions. Second operand 18 states. [2020-04-17 23:00:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:25,818 INFO L93 Difference]: Finished difference Result 244 states and 570 transitions. [2020-04-17 23:00:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:25,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:25,820 INFO L225 Difference]: With dead ends: 244 [2020-04-17 23:00:25,820 INFO L226 Difference]: Without dead ends: 242 [2020-04-17 23:00:25,820 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=247, Invalid=504, Unknown=5, NotChecked=0, Total=756 [2020-04-17 23:00:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-04-17 23:00:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2020-04-17 23:00:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-04-17 23:00:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 440 transitions. [2020-04-17 23:00:25,824 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 440 transitions. Word has length 14 [2020-04-17 23:00:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:25,824 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 440 transitions. [2020-04-17 23:00:25,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 440 transitions. [2020-04-17 23:00:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:25,825 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:25,825 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:26,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:26,027 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-04-17 23:00:26,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:26,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529087298] [2020-04-17 23:00:26,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:26,124 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 23:00:26,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529087298] [2020-04-17 23:00:26,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966140588] [2020-04-17 23:00:26,125 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 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 23:00:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:26,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:26,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:26,356 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 23:00:26,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:26,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:26,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772168199] [2020-04-17 23:00:26,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:26,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:26,358 INFO L87 Difference]: Start difference. First operand 173 states and 440 transitions. Second operand 17 states. [2020-04-17 23:00:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:26,684 INFO L93 Difference]: Finished difference Result 245 states and 573 transitions. [2020-04-17 23:00:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:26,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:26,685 INFO L225 Difference]: With dead ends: 245 [2020-04-17 23:00:26,685 INFO L226 Difference]: Without dead ends: 243 [2020-04-17 23:00:26,686 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-04-17 23:00:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 172. [2020-04-17 23:00:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:00:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 437 transitions. [2020-04-17 23:00:26,690 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 437 transitions. Word has length 14 [2020-04-17 23:00:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:26,690 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 437 transitions. [2020-04-17 23:00:26,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 437 transitions. [2020-04-17 23:00:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:26,690 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:26,691 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:26,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:26,894 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-04-17 23:00:26,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:26,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963206865] [2020-04-17 23:00:26,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:26,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963206865] [2020-04-17 23:00:26,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422098776] [2020-04-17 23:00:26,983 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 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 23:00:27,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:27,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:27,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:27,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:33,231 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 23:00:33,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:33,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:33,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413531840] [2020-04-17 23:00:33,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:33,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:33,232 INFO L87 Difference]: Start difference. First operand 172 states and 437 transitions. Second operand 17 states. [2020-04-17 23:00:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:33,568 INFO L93 Difference]: Finished difference Result 237 states and 559 transitions. [2020-04-17 23:00:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:33,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:33,569 INFO L225 Difference]: With dead ends: 237 [2020-04-17 23:00:33,569 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 23:00:33,569 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 23:00:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 169. [2020-04-17 23:00:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-04-17 23:00:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 428 transitions. [2020-04-17 23:00:33,573 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 428 transitions. Word has length 14 [2020-04-17 23:00:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:33,573 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 428 transitions. [2020-04-17 23:00:33,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 428 transitions. [2020-04-17 23:00:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:33,574 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:33,574 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:33,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:33,777 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-04-17 23:00:33,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:33,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906118980] [2020-04-17 23:00:33,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:33,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906118980] [2020-04-17 23:00:33,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566227441] [2020-04-17 23:00:33,860 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 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 23:00:33,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:33,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:33,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:33,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:34,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:34,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:34,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544872503] [2020-04-17 23:00:34,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:34,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:34,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:34,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:34,023 INFO L87 Difference]: Start difference. First operand 169 states and 428 transitions. Second operand 17 states. [2020-04-17 23:00:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:34,371 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-04-17 23:00:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:34,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:34,372 INFO L225 Difference]: With dead ends: 231 [2020-04-17 23:00:34,372 INFO L226 Difference]: Without dead ends: 229 [2020-04-17 23:00:34,373 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-04-17 23:00:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 172. [2020-04-17 23:00:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:00:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 437 transitions. [2020-04-17 23:00:34,377 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 437 transitions. Word has length 14 [2020-04-17 23:00:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:34,377 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 437 transitions. [2020-04-17 23:00:34,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 437 transitions. [2020-04-17 23:00:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:34,377 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:34,377 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:34,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:34,578 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-04-17 23:00:34,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:34,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029674739] [2020-04-17 23:00:34,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:34,668 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 23:00:34,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029674739] [2020-04-17 23:00:34,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950280140] [2020-04-17 23:00:34,669 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 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 23:00:34,712 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:34,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:34,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:34,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:35,375 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 23:00:35,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:35,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:35,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663961373] [2020-04-17 23:00:35,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:35,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:35,377 INFO L87 Difference]: Start difference. First operand 172 states and 437 transitions. Second operand 17 states. [2020-04-17 23:00:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:35,734 INFO L93 Difference]: Finished difference Result 245 states and 573 transitions. [2020-04-17 23:00:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:00:35,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:35,736 INFO L225 Difference]: With dead ends: 245 [2020-04-17 23:00:35,736 INFO L226 Difference]: Without dead ends: 243 [2020-04-17 23:00:35,736 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-04-17 23:00:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 172. [2020-04-17 23:00:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:00:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 437 transitions. [2020-04-17 23:00:35,740 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 437 transitions. Word has length 14 [2020-04-17 23:00:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:35,740 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 437 transitions. [2020-04-17 23:00:35,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 437 transitions. [2020-04-17 23:00:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:35,741 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:35,741 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:35,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:35,942 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-04-17 23:00:35,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:35,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550784661] [2020-04-17 23:00:35,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:36,051 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 23:00:36,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550784661] [2020-04-17 23:00:36,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527275292] [2020-04-17 23:00:36,052 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 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 23:00:36,094 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:36,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:36,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:36,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:36,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:36,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:36,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882041484] [2020-04-17 23:00:36,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:36,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:36,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:36,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:36,209 INFO L87 Difference]: Start difference. First operand 172 states and 437 transitions. Second operand 17 states. [2020-04-17 23:00:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:36,570 INFO L93 Difference]: Finished difference Result 241 states and 569 transitions. [2020-04-17 23:00:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:36,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:36,571 INFO L225 Difference]: With dead ends: 241 [2020-04-17 23:00:36,571 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 23:00:36,572 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 23:00:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 172. [2020-04-17 23:00:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:00:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 437 transitions. [2020-04-17 23:00:36,575 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 437 transitions. Word has length 14 [2020-04-17 23:00:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:36,576 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 437 transitions. [2020-04-17 23:00:36,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 437 transitions. [2020-04-17 23:00:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:36,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:36,576 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:36,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:36,780 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-04-17 23:00:36,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:36,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822226081] [2020-04-17 23:00:36,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:36,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822226081] [2020-04-17 23:00:36,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373105124] [2020-04-17 23:00:36,922 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 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 23:00:36,997 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:36,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:36,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:37,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:37,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:37,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:37,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217673264] [2020-04-17 23:00:37,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:37,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:37,180 INFO L87 Difference]: Start difference. First operand 172 states and 437 transitions. Second operand 17 states. [2020-04-17 23:00:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:37,447 INFO L93 Difference]: Finished difference Result 224 states and 531 transitions. [2020-04-17 23:00:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:37,448 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:37,448 INFO L225 Difference]: With dead ends: 224 [2020-04-17 23:00:37,448 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 23:00:37,449 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 23:00:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 168. [2020-04-17 23:00:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-04-17 23:00:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 424 transitions. [2020-04-17 23:00:37,452 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 424 transitions. Word has length 14 [2020-04-17 23:00:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:37,452 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 424 transitions. [2020-04-17 23:00:37,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 424 transitions. [2020-04-17 23:00:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:37,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:37,453 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:37,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:37,654 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-04-17 23:00:37,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:37,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521602598] [2020-04-17 23:00:37,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:37,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521602598] [2020-04-17 23:00:37,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852339720] [2020-04-17 23:00:37,761 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 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 23:00:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:37,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:37,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:37,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:37,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:37,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582868867] [2020-04-17 23:00:37,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:37,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:37,924 INFO L87 Difference]: Start difference. First operand 168 states and 424 transitions. Second operand 17 states. [2020-04-17 23:00:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:38,026 INFO L93 Difference]: Finished difference Result 215 states and 514 transitions. [2020-04-17 23:00:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:00:38,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:38,027 INFO L225 Difference]: With dead ends: 215 [2020-04-17 23:00:38,028 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 23:00:38,028 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:00:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 23:00:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2020-04-17 23:00:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-04-17 23:00:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-04-17 23:00:38,032 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-04-17 23:00:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:38,032 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-04-17 23:00:38,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-04-17 23:00:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:38,033 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:38,033 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:38,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:38,233 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-04-17 23:00:38,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:38,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445119440] [2020-04-17 23:00:38,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:38,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445119440] [2020-04-17 23:00:38,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230706331] [2020-04-17 23:00:38,339 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 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 23:00:38,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:38,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:38,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:38,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:38,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:38,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:38,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862120809] [2020-04-17 23:00:38,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:38,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:38,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:38,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:38,513 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-04-17 23:00:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:38,743 INFO L93 Difference]: Finished difference Result 237 states and 558 transitions. [2020-04-17 23:00:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:38,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:38,745 INFO L225 Difference]: With dead ends: 237 [2020-04-17 23:00:38,745 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 23:00:38,745 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 23:00:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 172. [2020-04-17 23:00:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:00:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-04-17 23:00:38,749 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-04-17 23:00:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:38,749 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-04-17 23:00:38,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-04-17 23:00:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:38,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:38,750 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:38,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:38,951 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-04-17 23:00:38,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:38,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317914673] [2020-04-17 23:00:38,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:39,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317914673] [2020-04-17 23:00:39,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835069979] [2020-04-17 23:00:39,045 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 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 23:00:39,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:39,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:39,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:39,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:47,293 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 23:00:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:47,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:47,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:47,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719009805] [2020-04-17 23:00:47,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:47,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=226, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:00:47,296 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 18 states. [2020-04-17 23:00:49,506 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:00:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:58,371 INFO L93 Difference]: Finished difference Result 251 states and 586 transitions. [2020-04-17 23:00:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:58,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:58,372 INFO L225 Difference]: With dead ends: 251 [2020-04-17 23:00:58,372 INFO L226 Difference]: Without dead ends: 249 [2020-04-17 23:00:58,372 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=205, Invalid=442, Unknown=3, NotChecked=0, Total=650 [2020-04-17 23:00:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-04-17 23:00:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 170. [2020-04-17 23:00:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-04-17 23:00:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 430 transitions. [2020-04-17 23:00:58,386 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 430 transitions. Word has length 14 [2020-04-17 23:00:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:58,386 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 430 transitions. [2020-04-17 23:00:58,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 430 transitions. [2020-04-17 23:00:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:58,386 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:58,387 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:58,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:58,587 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:58,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:58,588 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-04-17 23:00:58,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:58,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550471637] [2020-04-17 23:00:58,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:58,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550471637] [2020-04-17 23:00:58,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740619346] [2020-04-17 23:00:58,669 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 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 23:00:58,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:58,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:58,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:58,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:00,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:00,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:00,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589339361] [2020-04-17 23:01:00,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:00,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:00,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:01:00,960 INFO L87 Difference]: Start difference. First operand 170 states and 430 transitions. Second operand 18 states. [2020-04-17 23:01:01,739 WARN L192 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:01:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:05,372 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-04-17 23:01:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:01:05,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:05,373 INFO L225 Difference]: With dead ends: 253 [2020-04-17 23:01:05,374 INFO L226 Difference]: Without dead ends: 251 [2020-04-17 23:01:05,374 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=253, Invalid=554, Unknown=5, NotChecked=0, Total=812 [2020-04-17 23:01:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-04-17 23:01:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 172. [2020-04-17 23:01:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:01:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-04-17 23:01:05,379 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-04-17 23:01:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:05,379 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-04-17 23:01:05,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-04-17 23:01:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:05,380 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:05,380 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:05,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:05,580 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-04-17 23:01:05,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:05,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542995316] [2020-04-17 23:01:05,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:05,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542995316] [2020-04-17 23:01:05,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794481837] [2020-04-17 23:01:05,657 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 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 23:01:05,699 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:05,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:05,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:05,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:05,866 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 23:01:05,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:05,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:05,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688352657] [2020-04-17 23:01:05,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:05,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:05,867 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-04-17 23:01:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:06,230 INFO L93 Difference]: Finished difference Result 249 states and 580 transitions. [2020-04-17 23:01:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:06,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:06,231 INFO L225 Difference]: With dead ends: 249 [2020-04-17 23:01:06,231 INFO L226 Difference]: Without dead ends: 247 [2020-04-17 23:01:06,232 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-04-17 23:01:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 172. [2020-04-17 23:01:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:01:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 435 transitions. [2020-04-17 23:01:06,236 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 435 transitions. Word has length 14 [2020-04-17 23:01:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:06,236 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 435 transitions. [2020-04-17 23:01:06,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 435 transitions. [2020-04-17 23:01:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:06,236 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:06,237 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:06,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:06,437 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-04-17 23:01:06,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:06,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830159730] [2020-04-17 23:01:06,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:06,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830159730] [2020-04-17 23:01:06,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741674794] [2020-04-17 23:01:06,518 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 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 23:01:06,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:06,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:06,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:06,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:06,709 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 23:01:06,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:06,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:06,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642057058] [2020-04-17 23:01:06,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:06,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:06,711 INFO L87 Difference]: Start difference. First operand 172 states and 435 transitions. Second operand 17 states. [2020-04-17 23:01:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:07,086 INFO L93 Difference]: Finished difference Result 241 states and 568 transitions. [2020-04-17 23:01:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:07,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:07,087 INFO L225 Difference]: With dead ends: 241 [2020-04-17 23:01:07,087 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 23:01:07,088 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 23:01:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 169. [2020-04-17 23:01:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-04-17 23:01:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-04-17 23:01:07,091 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-04-17 23:01:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:07,092 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-04-17 23:01:07,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-04-17 23:01:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:07,092 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:07,092 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:07,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:07,293 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-04-17 23:01:07,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:07,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604847498] [2020-04-17 23:01:07,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:07,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604847498] [2020-04-17 23:01:07,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68381405] [2020-04-17 23:01:07,410 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 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 23:01:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:07,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:07,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:07,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:07,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:07,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829575564] [2020-04-17 23:01:07,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:07,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:07,585 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-04-17 23:01:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:07,714 INFO L93 Difference]: Finished difference Result 211 states and 505 transitions. [2020-04-17 23:01:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:01:07,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:07,715 INFO L225 Difference]: With dead ends: 211 [2020-04-17 23:01:07,716 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 23:01:07,716 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:01:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 23:01:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 173. [2020-04-17 23:01:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-04-17 23:01:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 438 transitions. [2020-04-17 23:01:07,720 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 438 transitions. Word has length 14 [2020-04-17 23:01:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:07,720 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 438 transitions. [2020-04-17 23:01:07,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 438 transitions. [2020-04-17 23:01:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:07,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:07,721 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:07,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:07,922 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:07,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-04-17 23:01:07,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:07,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211392990] [2020-04-17 23:01:07,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:08,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211392990] [2020-04-17 23:01:08,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965036993] [2020-04-17 23:01:08,021 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 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 23:01:08,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:08,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:08,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:08,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:08,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:08,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:08,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355574811] [2020-04-17 23:01:08,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:08,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:08,188 INFO L87 Difference]: Start difference. First operand 173 states and 438 transitions. Second operand 17 states. [2020-04-17 23:01:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:08,440 INFO L93 Difference]: Finished difference Result 233 states and 549 transitions. [2020-04-17 23:01:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:08,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:08,442 INFO L225 Difference]: With dead ends: 233 [2020-04-17 23:01:08,442 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 23:01:08,442 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:01:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 23:01:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 171. [2020-04-17 23:01:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 23:01:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 432 transitions. [2020-04-17 23:01:08,446 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 432 transitions. Word has length 14 [2020-04-17 23:01:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:08,447 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 432 transitions. [2020-04-17 23:01:08,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 432 transitions. [2020-04-17 23:01:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:08,447 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:08,447 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:08,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:08,648 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-04-17 23:01:08,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:08,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758142959] [2020-04-17 23:01:08,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:08,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758142959] [2020-04-17 23:01:08,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557114375] [2020-04-17 23:01:08,736 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 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 23:01:08,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:08,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:08,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:08,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:09,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:09,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:09,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192223184] [2020-04-17 23:01:09,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:09,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:09,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:09,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:09,679 INFO L87 Difference]: Start difference. First operand 171 states and 432 transitions. Second operand 17 states. [2020-04-17 23:01:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:10,400 INFO L93 Difference]: Finished difference Result 237 states and 555 transitions. [2020-04-17 23:01:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:10,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:10,403 INFO L225 Difference]: With dead ends: 237 [2020-04-17 23:01:10,403 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 23:01:10,403 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=450, Unknown=1, NotChecked=0, Total=650 [2020-04-17 23:01:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 23:01:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 170. [2020-04-17 23:01:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-04-17 23:01:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 428 transitions. [2020-04-17 23:01:10,406 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 428 transitions. Word has length 14 [2020-04-17 23:01:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:10,406 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 428 transitions. [2020-04-17 23:01:10,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 428 transitions. [2020-04-17 23:01:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:10,406 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:10,407 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:10,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:10,607 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-04-17 23:01:10,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:10,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953528062] [2020-04-17 23:01:10,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:10,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953528062] [2020-04-17 23:01:10,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486424257] [2020-04-17 23:01:10,708 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 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 23:01:10,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:10,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:10,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:10,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:10,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:10,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:10,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766835176] [2020-04-17 23:01:10,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:10,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:10,881 INFO L87 Difference]: Start difference. First operand 170 states and 428 transitions. Second operand 17 states. [2020-04-17 23:01:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:11,029 INFO L93 Difference]: Finished difference Result 207 states and 496 transitions. [2020-04-17 23:01:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:01:11,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:11,031 INFO L225 Difference]: With dead ends: 207 [2020-04-17 23:01:11,031 INFO L226 Difference]: Without dead ends: 205 [2020-04-17 23:01:11,031 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:01:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-04-17 23:01:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 172. [2020-04-17 23:01:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:01:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 434 transitions. [2020-04-17 23:01:11,035 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 434 transitions. Word has length 14 [2020-04-17 23:01:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:11,035 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 434 transitions. [2020-04-17 23:01:11,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 434 transitions. [2020-04-17 23:01:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:11,035 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:11,035 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:11,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:11,238 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-04-17 23:01:11,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:11,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366924498] [2020-04-17 23:01:11,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:11,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366924498] [2020-04-17 23:01:11,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059020380] [2020-04-17 23:01:11,367 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 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 23:01:11,419 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:11,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:11,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:11,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:11,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:11,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:11,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171818771] [2020-04-17 23:01:11,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:11,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:11,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:11,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:11,550 INFO L87 Difference]: Start difference. First operand 172 states and 434 transitions. Second operand 17 states. [2020-04-17 23:01:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:11,837 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2020-04-17 23:01:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:11,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:11,838 INFO L225 Difference]: With dead ends: 229 [2020-04-17 23:01:11,838 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 23:01:11,839 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:01:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 23:01:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2020-04-17 23:01:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 23:01:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 430 transitions. [2020-04-17 23:01:11,843 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 430 transitions. Word has length 14 [2020-04-17 23:01:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:11,843 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 430 transitions. [2020-04-17 23:01:11,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 430 transitions. [2020-04-17 23:01:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:11,843 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:11,844 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:12,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:12,047 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-04-17 23:01:12,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:12,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669030430] [2020-04-17 23:01:12,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669030430] [2020-04-17 23:01:12,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49578406] [2020-04-17 23:01:12,143 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 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 23:01:12,186 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:12,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:12,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:01:12,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:12,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:01:12,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682915552] [2020-04-17 23:01:12,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:01:12,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:01:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:01:12,208 INFO L87 Difference]: Start difference. First operand 171 states and 430 transitions. Second operand 11 states. [2020-04-17 23:01:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:12,354 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-04-17 23:01:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:01:12,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:01:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:12,355 INFO L225 Difference]: With dead ends: 208 [2020-04-17 23:01:12,355 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 23:01:12,356 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:01:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 23:01:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 175. [2020-04-17 23:01:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-04-17 23:01:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 436 transitions. [2020-04-17 23:01:12,359 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 436 transitions. Word has length 14 [2020-04-17 23:01:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:12,359 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 436 transitions. [2020-04-17 23:01:12,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:01:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 436 transitions. [2020-04-17 23:01:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:12,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:12,360 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:12,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:12,560 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-04-17 23:01:12,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:12,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716653089] [2020-04-17 23:01:12,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716653089] [2020-04-17 23:01:12,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162877877] [2020-04-17 23:01:12,636 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 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 23:01:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:12,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:12,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:12,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:12,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:12,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316521835] [2020-04-17 23:01:12,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:12,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:12,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:12,794 INFO L87 Difference]: Start difference. First operand 175 states and 436 transitions. Second operand 17 states. [2020-04-17 23:01:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:13,164 INFO L93 Difference]: Finished difference Result 232 states and 555 transitions. [2020-04-17 23:01:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:13,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:13,165 INFO L225 Difference]: With dead ends: 232 [2020-04-17 23:01:13,165 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 23:01:13,166 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:01:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 23:01:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 173. [2020-04-17 23:01:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-04-17 23:01:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 429 transitions. [2020-04-17 23:01:13,170 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 429 transitions. Word has length 14 [2020-04-17 23:01:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:13,170 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 429 transitions. [2020-04-17 23:01:13,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 429 transitions. [2020-04-17 23:01:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:13,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:13,170 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:13,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:13,371 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-04-17 23:01:13,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:13,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909196819] [2020-04-17 23:01:13,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:13,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909196819] [2020-04-17 23:01:13,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503135648] [2020-04-17 23:01:13,445 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 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 23:01:13,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:13,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:13,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:13,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:13,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:13,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:13,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969413035] [2020-04-17 23:01:13,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:13,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:13,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:13,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:13,615 INFO L87 Difference]: Start difference. First operand 173 states and 429 transitions. Second operand 17 states. [2020-04-17 23:01:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:13,915 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-04-17 23:01:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:01:13,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:13,916 INFO L225 Difference]: With dead ends: 226 [2020-04-17 23:01:13,916 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 23:01:13,917 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 23:01:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 175. [2020-04-17 23:01:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-04-17 23:01:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 436 transitions. [2020-04-17 23:01:13,920 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 436 transitions. Word has length 14 [2020-04-17 23:01:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:13,920 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 436 transitions. [2020-04-17 23:01:13,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 436 transitions. [2020-04-17 23:01:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:13,920 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:13,920 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:14,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:14,121 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-04-17 23:01:14,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:14,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014722003] [2020-04-17 23:01:14,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:14,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014722003] [2020-04-17 23:01:14,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819504172] [2020-04-17 23:01:14,192 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:01:14,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:14,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:14,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:14,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:15,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:15,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:15,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:15,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630560429] [2020-04-17 23:01:15,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:15,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=183, Unknown=2, NotChecked=0, Total=272 [2020-04-17 23:01:15,255 INFO L87 Difference]: Start difference. First operand 175 states and 436 transitions. Second operand 17 states. [2020-04-17 23:01:15,734 WARN L192 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 23:01:16,358 WARN L192 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 23:01:16,632 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 23:01:16,862 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 23:01:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:16,895 INFO L93 Difference]: Finished difference Result 254 states and 606 transitions. [2020-04-17 23:01:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:01:16,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:16,896 INFO L225 Difference]: With dead ends: 254 [2020-04-17 23:01:16,897 INFO L226 Difference]: Without dead ends: 249 [2020-04-17 23:01:16,897 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=319, Invalid=671, Unknown=2, NotChecked=0, Total=992 [2020-04-17 23:01:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-04-17 23:01:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2020-04-17 23:01:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-04-17 23:01:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 436 transitions. [2020-04-17 23:01:16,901 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 436 transitions. Word has length 14 [2020-04-17 23:01:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:16,901 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 436 transitions. [2020-04-17 23:01:16,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 436 transitions. [2020-04-17 23:01:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:16,901 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:16,902 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:17,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,105 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-04-17 23:01:17,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:17,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981669215] [2020-04-17 23:01:17,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:17,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981669215] [2020-04-17 23:01:17,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344029644] [2020-04-17 23:01:17,188 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 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 23:01:17,230 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:17,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:17,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:17,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:17,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:17,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:17,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:17,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458666702] [2020-04-17 23:01:17,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:17,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:17,353 INFO L87 Difference]: Start difference. First operand 175 states and 436 transitions. Second operand 17 states. [2020-04-17 23:01:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:17,719 INFO L93 Difference]: Finished difference Result 245 states and 586 transitions. [2020-04-17 23:01:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:17,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:17,720 INFO L225 Difference]: With dead ends: 245 [2020-04-17 23:01:17,720 INFO L226 Difference]: Without dead ends: 240 [2020-04-17 23:01:17,720 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:01:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-04-17 23:01:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 171. [2020-04-17 23:01:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 23:01:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 422 transitions. [2020-04-17 23:01:17,725 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 422 transitions. Word has length 14 [2020-04-17 23:01:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:17,725 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 422 transitions. [2020-04-17 23:01:17,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 422 transitions. [2020-04-17 23:01:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:17,726 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:17,726 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:17,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,929 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:17,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-04-17 23:01:17,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:17,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594708818] [2020-04-17 23:01:17,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594708818] [2020-04-17 23:01:18,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433749770] [2020-04-17 23:01:18,008 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 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 23:01:18,051 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:18,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:18,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:18,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:18,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:18,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769810401] [2020-04-17 23:01:18,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:18,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:18,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:18,940 INFO L87 Difference]: Start difference. First operand 171 states and 422 transitions. Second operand 17 states. [2020-04-17 23:01:19,710 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:01:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:19,736 INFO L93 Difference]: Finished difference Result 241 states and 563 transitions. [2020-04-17 23:01:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:19,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:19,737 INFO L225 Difference]: With dead ends: 241 [2020-04-17 23:01:19,737 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 23:01:19,738 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 23:01:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 173. [2020-04-17 23:01:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-04-17 23:01:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 429 transitions. [2020-04-17 23:01:19,741 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 429 transitions. Word has length 14 [2020-04-17 23:01:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:19,741 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 429 transitions. [2020-04-17 23:01:19,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 429 transitions. [2020-04-17 23:01:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:19,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:19,742 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:19,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:19,943 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-04-17 23:01:19,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:19,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768057114] [2020-04-17 23:01:19,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:20,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768057114] [2020-04-17 23:01:20,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608450086] [2020-04-17 23:01:20,015 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 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 23:01:20,058 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:20,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:20,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:20,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:21,053 WARN L192 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 23:01:27,102 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 23:01:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:27,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:27,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:27,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211155108] [2020-04-17 23:01:27,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:27,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=222, Unknown=2, NotChecked=0, Total=306 [2020-04-17 23:01:27,105 INFO L87 Difference]: Start difference. First operand 173 states and 429 transitions. Second operand 18 states. [2020-04-17 23:01:27,604 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:01:29,693 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 27 [2020-04-17 23:01:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:45,430 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2020-04-17 23:01:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:01:45,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:45,434 INFO L225 Difference]: With dead ends: 269 [2020-04-17 23:01:45,435 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 23:01:45,435 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=283, Invalid=645, Unknown=2, NotChecked=0, Total=930 [2020-04-17 23:01:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 23:01:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 175. [2020-04-17 23:01:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-04-17 23:01:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 436 transitions. [2020-04-17 23:01:45,437 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 436 transitions. Word has length 14 [2020-04-17 23:01:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:45,437 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 436 transitions. [2020-04-17 23:01:45,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 436 transitions. [2020-04-17 23:01:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:45,438 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:45,438 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:45,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:45,639 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:45,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-04-17 23:01:45,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:45,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523981012] [2020-04-17 23:01:45,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523981012] [2020-04-17 23:01:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563706783] [2020-04-17 23:01:45,710 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 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 23:01:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:45,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:45,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:47,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:47,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:47,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:47,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127809659] [2020-04-17 23:01:47,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:47,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=180, Unknown=3, NotChecked=0, Total=272 [2020-04-17 23:01:47,249 INFO L87 Difference]: Start difference. First operand 175 states and 436 transitions. Second operand 17 states. [2020-04-17 23:01:48,029 WARN L192 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:48,792 WARN L192 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 23:01:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:49,525 INFO L93 Difference]: Finished difference Result 264 states and 633 transitions. [2020-04-17 23:01:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:49,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:49,526 INFO L225 Difference]: With dead ends: 264 [2020-04-17 23:01:49,526 INFO L226 Difference]: Without dead ends: 259 [2020-04-17 23:01:49,526 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=365, Invalid=753, Unknown=4, NotChecked=0, Total=1122 [2020-04-17 23:01:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-04-17 23:01:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 176. [2020-04-17 23:01:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-04-17 23:01:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 441 transitions. [2020-04-17 23:01:49,530 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 441 transitions. Word has length 14 [2020-04-17 23:01:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:49,530 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 441 transitions. [2020-04-17 23:01:49,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 441 transitions. [2020-04-17 23:01:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:49,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:49,531 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:49,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:49,735 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-04-17 23:01:49,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:49,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805687259] [2020-04-17 23:01:49,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:49,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805687259] [2020-04-17 23:01:49,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032158546] [2020-04-17 23:01:49,809 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 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 23:01:49,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:49,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:49,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:49,851 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:50,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:50,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:50,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:50,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132881786] [2020-04-17 23:01:50,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:50,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=215, Unknown=1, NotChecked=0, Total=306 [2020-04-17 23:01:50,601 INFO L87 Difference]: Start difference. First operand 176 states and 441 transitions. Second operand 18 states. [2020-04-17 23:01:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:55,258 INFO L93 Difference]: Finished difference Result 293 states and 701 transitions. [2020-04-17 23:01:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:01:55,258 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:55,259 INFO L225 Difference]: With dead ends: 293 [2020-04-17 23:01:55,259 INFO L226 Difference]: Without dead ends: 285 [2020-04-17 23:01:55,259 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=385, Invalid=873, Unknown=2, NotChecked=0, Total=1260 [2020-04-17 23:01:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-04-17 23:01:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 171. [2020-04-17 23:01:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 23:01:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 425 transitions. [2020-04-17 23:01:55,261 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 425 transitions. Word has length 14 [2020-04-17 23:01:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:55,262 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 425 transitions. [2020-04-17 23:01:55,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 425 transitions. [2020-04-17 23:01:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:55,262 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:55,262 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:55,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:55,465 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:55,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-04-17 23:01:55,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:55,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459095395] [2020-04-17 23:01:55,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:55,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459095395] [2020-04-17 23:01:55,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669960777] [2020-04-17 23:01:55,552 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 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 23:01:55,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:55,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:55,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:55,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:56,346 WARN L192 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-04-17 23:01:56,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:56,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:56,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:56,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897744763] [2020-04-17 23:01:56,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:56,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:56,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:56,365 INFO L87 Difference]: Start difference. First operand 171 states and 425 transitions. Second operand 17 states. [2020-04-17 23:01:57,251 WARN L192 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:57,686 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-04-17 23:01:58,641 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 23:01:59,103 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-04-17 23:01:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:59,176 INFO L93 Difference]: Finished difference Result 267 states and 640 transitions. [2020-04-17 23:01:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:59,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:59,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:59,177 INFO L225 Difference]: With dead ends: 267 [2020-04-17 23:01:59,178 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 23:01:59,178 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=338, Invalid=717, Unknown=1, NotChecked=0, Total=1056 [2020-04-17 23:01:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 23:01:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 169. [2020-04-17 23:01:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-04-17 23:01:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 415 transitions. [2020-04-17 23:01:59,181 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 415 transitions. Word has length 14 [2020-04-17 23:01:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:59,182 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 415 transitions. [2020-04-17 23:01:59,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 415 transitions. [2020-04-17 23:01:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:59,182 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:59,182 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:59,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:59,383 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-04-17 23:01:59,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:59,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435307205] [2020-04-17 23:01:59,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:59,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435307205] [2020-04-17 23:01:59,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277728964] [2020-04-17 23:01:59,462 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 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 23:01:59,504 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:59,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:59,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:59,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-04-17 23:02:07,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:07,915 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 23:02:07,920 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 23:02:07,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:02:07 BasicIcfg [2020-04-17 23:02:07,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:02:07,921 INFO L168 Benchmark]: Toolchain (without parser) took 288132.01 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 98.8 MB in the beginning and 143.3 MB in the end (delta: -44.5 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,921 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,922 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.70 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 96.9 MB in the beginning and 157.0 MB in the end (delta: -60.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,922 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.80 ms. Allocated memory is still 200.3 MB. Free memory was 157.0 MB in the beginning and 154.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,922 INFO L168 Benchmark]: Boogie Preprocessor took 32.11 ms. Allocated memory is still 200.3 MB. Free memory was 154.9 MB in the beginning and 153.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,922 INFO L168 Benchmark]: RCFGBuilder took 472.31 ms. Allocated memory is still 200.3 MB. Free memory was 153.5 MB in the beginning and 132.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:07,923 INFO L168 Benchmark]: TraceAbstraction took 286763.29 ms. Allocated memory was 200.3 MB in the beginning and 205.5 MB in the end (delta: 5.2 MB). Free memory was 132.7 MB in the beginning and 143.3 MB in the end (delta: -10.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-17 23:02:07,924 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 784.70 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 96.9 MB in the beginning and 157.0 MB in the end (delta: -60.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.80 ms. Allocated memory is still 200.3 MB. Free memory was 157.0 MB in the beginning and 154.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.11 ms. Allocated memory is still 200.3 MB. Free memory was 154.9 MB in the beginning and 153.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.31 ms. Allocated memory is still 200.3 MB. Free memory was 153.5 MB in the beginning and 132.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 286763.29 ms. Allocated memory was 200.3 MB in the beginning and 205.5 MB in the end (delta: 5.2 MB). Free memory was 132.7 MB in the beginning and 143.3 MB in the end (delta: -10.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 286.6s, OverallIterations: 194, TraceHistogramMax: 6, AutomataDifference: 128.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 2509 SDtfs, 17984 SDslu, 17412 SDs, 0 SdLazy, 12267 SolverSat, 4428 SolverUnsat, 46 SolverUnknown, 0 SolverNotchecked, 67.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4881 GetRequests, 913 SyntacticMatches, 168 SemanticMatches, 3800 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 19604 ImplicationChecksByTransitivity, 152.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 193 MinimizatonAttempts, 9119 StatesRemovedByMinimization, 193 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 99.2s InterpolantComputationTime, 4754 NumberOfCodeBlocks, 4754 NumberOfCodeBlocksAsserted, 590 NumberOfCheckSat, 4376 ConstructedInterpolants, 53 QuantifiedInterpolants, 460707 SizeOfPredicates, 185 NumberOfNonLiveVariables, 16120 ConjunctsInSsa, 1821 ConjunctsInUnsatCore, 378 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1914 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 could not prove your program: Timeout Completed graceful shutdown