/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 11:32:24,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 11:32:24,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 11:32:24,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 11:32:24,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 11:32:24,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 11:32:24,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 11:32:24,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 11:32:24,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 11:32:24,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 11:32:24,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 11:32:24,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 11:32:24,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 11:32:24,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 11:32:24,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 11:32:24,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 11:32:24,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 11:32:24,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 11:32:24,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 11:32:24,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 11:32:24,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 11:32:24,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 11:32:24,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 11:32:24,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 11:32:24,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 11:32:24,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 11:32:24,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 11:32:24,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 11:32:24,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 11:32:24,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 11:32:24,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 11:32:24,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 11:32:24,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 11:32:24,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 11:32:24,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 11:32:24,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 11:32:24,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 11:32:24,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 11:32:24,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 11:32:24,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 11:32:24,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 11:32:24,461 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-NoLbe.epf [2021-01-20 11:32:24,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 11:32:24,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 11:32:24,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 11:32:24,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 11:32:24,491 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 11:32:24,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 11:32:24,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 11:32:24,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 11:32:24,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 11:32:24,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 11:32:24,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 11:32:24,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 11:32:24,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 11:32:24,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 11:32:24,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 11:32:24,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 11:32:24,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 11:32:24,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 11:32:24,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 11:32:24,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 11:32:24,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 11:32:24,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 11:32:24,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 11:32:24,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 11:32:24,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 11:32:24,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 11:32:24,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 11:32:24,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 11:32:24,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 11:32:24,498 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 11:32:24,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 11:32:24,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 11:32:24,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 11:32:24,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 11:32:24,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 11:32:24,941 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 11:32:24,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2021-01-20 11:32:25,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c2388415/fa97524c8d6b4b9894c226cab56c5c8a/FLAG37528b8c5 [2021-01-20 11:32:25,712 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 11:32:25,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2021-01-20 11:32:25,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c2388415/fa97524c8d6b4b9894c226cab56c5c8a/FLAG37528b8c5 [2021-01-20 11:32:26,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c2388415/fa97524c8d6b4b9894c226cab56c5c8a [2021-01-20 11:32:26,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 11:32:26,021 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 11:32:26,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:26,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 11:32:26,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 11:32:26,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1193a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26, skipping insertion in model container [2021-01-20 11:32:26,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 11:32:26,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 11:32:26,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:26,616 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 11:32:26,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:26,761 INFO L208 MainTranslator]: Completed translation [2021-01-20 11:32:26,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26 WrapperNode [2021-01-20 11:32:26,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:26,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:26,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 11:32:26,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 11:32:26,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:26,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 11:32:26,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 11:32:26,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 11:32:26,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 11:32:26,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 11:32:26,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 11:32:26,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 11:32:26,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (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 [2021-01-20 11:32:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 11:32:26,940 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 11:32:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 11:32:26,940 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 11:32:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 11:32:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 11:32:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 11:32:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 11:32:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 11:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 11:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 11:32:26,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 11:32:26,944 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 11:32:27,516 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 11:32:27,516 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 11:32:27,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:27 BoogieIcfgContainer [2021-01-20 11:32:27,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 11:32:27,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 11:32:27,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 11:32:27,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 11:32:27,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:32:26" (1/3) ... [2021-01-20 11:32:27,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bf09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:27, skipping insertion in model container [2021-01-20 11:32:27,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26" (2/3) ... [2021-01-20 11:32:27,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bf09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:27, skipping insertion in model container [2021-01-20 11:32:27,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:27" (3/3) ... [2021-01-20 11:32:27,533 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2021-01-20 11:32:27,551 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 11:32:27,552 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 11:32:27,556 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 11:32:27,557 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 11:32:27,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,615 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,616 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,616 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,616 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,617 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,622 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,622 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,622 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,623 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,623 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,623 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,623 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,626 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,628 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,632 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,632 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,632 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,632 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,633 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,633 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,641 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,642 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,642 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,642 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,643 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:27,656 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 11:32:27,674 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 11:32:27,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 11:32:27,715 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 11:32:27,715 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 11:32:27,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 11:32:27,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 11:32:27,716 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 11:32:27,716 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 11:32:27,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 11:32:27,729 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 11:32:27,911 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 11:32:27,936 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:27,937 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:27,938 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-20 11:32:27,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:27,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362071414] [2021-01-20 11:32:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:28,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362071414] [2021-01-20 11:32:28,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:28,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:32:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819363369] [2021-01-20 11:32:28,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:32:28,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:32:28,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:32:28,431 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:28,722 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 11:32:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 11:32:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 11:32:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:28,754 INFO L225 Difference]: With dead ends: 4034 [2021-01-20 11:32:28,754 INFO L226 Difference]: Without dead ends: 1472 [2021-01-20 11:32:28,756 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:32:28,756 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-20 11:32:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:28,757 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-20 11:32:28,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-20 11:32:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:28,766 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:28,767 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:28,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 11:32:28,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-20 11:32:28,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:28,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879590092] [2021-01-20 11:32:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:29,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879590092] [2021-01-20 11:32:29,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:29,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:29,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20498225] [2021-01-20 11:32:29,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:29,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:29,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:29,089 INFO L87 Difference]: Start difference. First operand 1472 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:29,423 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2021-01-20 11:32:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:29,439 INFO L225 Difference]: With dead ends: 1984 [2021-01-20 11:32:29,440 INFO L226 Difference]: Without dead ends: 1726 [2021-01-20 11:32:29,442 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:29,442 INFO L78 Accepts]: Start accepts. Automaton has 1726 states. Word has length 33 [2021-01-20 11:32:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states. [2021-01-20 11:32:29,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states. [2021-01-20 11:32:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:29,446 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:29,446 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:29,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 11:32:29,446 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-20 11:32:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:29,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420659359] [2021-01-20 11:32:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:29,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420659359] [2021-01-20 11:32:29,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:29,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285450369] [2021-01-20 11:32:29,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:29,640 INFO L87 Difference]: Start difference. First operand 1726 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:29,764 INFO L93 Difference]: Finished difference Result 2110 states and 5584 transitions. [2021-01-20 11:32:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:29,778 INFO L225 Difference]: With dead ends: 2110 [2021-01-20 11:32:29,778 INFO L226 Difference]: Without dead ends: 1806 [2021-01-20 11:32:29,778 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:29,778 INFO L78 Accepts]: Start accepts. Automaton has 1806 states. Word has length 33 [2021-01-20 11:32:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:29,779 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states. [2021-01-20 11:32:29,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states. [2021-01-20 11:32:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:29,782 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:29,782 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:29,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 11:32:29,782 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:29,783 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-20 11:32:29,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:29,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373790938] [2021-01-20 11:32:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:29,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373790938] [2021-01-20 11:32:29,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:29,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:29,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426056467] [2021-01-20 11:32:29,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:29,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:29,905 INFO L87 Difference]: Start difference. First operand 1806 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:30,099 INFO L93 Difference]: Finished difference Result 2318 states and 6128 transitions. [2021-01-20 11:32:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 11:32:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:30,115 INFO L225 Difference]: With dead ends: 2318 [2021-01-20 11:32:30,116 INFO L226 Difference]: Without dead ends: 1996 [2021-01-20 11:32:30,116 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:30,116 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-20 11:32:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:30,118 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-20 11:32:30,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-20 11:32:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:30,123 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:30,123 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:30,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 11:32:30,123 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-20 11:32:30,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:30,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343708271] [2021-01-20 11:32:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343708271] [2021-01-20 11:32:30,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743242451] [2021-01-20 11:32:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:32:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:30,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:30,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:30,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:30,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 11:32:30,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290413784] [2021-01-20 11:32:30,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:32:30,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:30,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:32:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:32:30,592 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:30,884 INFO L93 Difference]: Finished difference Result 2908 states and 7595 transitions. [2021-01-20 11:32:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:32:30,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:30,902 INFO L225 Difference]: With dead ends: 2908 [2021-01-20 11:32:30,902 INFO L226 Difference]: Without dead ends: 2544 [2021-01-20 11:32:30,903 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:32:30,903 INFO L78 Accepts]: Start accepts. Automaton has 2544 states. Word has length 38 [2021-01-20 11:32:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:30,904 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states. [2021-01-20 11:32:30,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states. [2021-01-20 11:32:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:30,907 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:30,908 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:31,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:31,123 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-20 11:32:31,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:31,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991502231] [2021-01-20 11:32:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:31,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991502231] [2021-01-20 11:32:31,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:31,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:31,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340776093] [2021-01-20 11:32:31,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:31,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:31,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:31,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:31,292 INFO L87 Difference]: Start difference. First operand 2544 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:31,424 INFO L93 Difference]: Finished difference Result 2736 states and 7057 transitions. [2021-01-20 11:32:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:31,442 INFO L225 Difference]: With dead ends: 2736 [2021-01-20 11:32:31,442 INFO L226 Difference]: Without dead ends: 2584 [2021-01-20 11:32:31,443 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:31,443 INFO L78 Accepts]: Start accepts. Automaton has 2584 states. Word has length 38 [2021-01-20 11:32:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:31,444 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states. [2021-01-20 11:32:31,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states. [2021-01-20 11:32:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:31,448 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:31,448 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:31,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 11:32:31,448 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-20 11:32:31,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:31,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378927557] [2021-01-20 11:32:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:31,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378927557] [2021-01-20 11:32:31,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:31,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199868696] [2021-01-20 11:32:31,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:31,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:31,631 INFO L87 Difference]: Start difference. First operand 2584 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:31,833 INFO L93 Difference]: Finished difference Result 3232 states and 8241 transitions. [2021-01-20 11:32:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:31,852 INFO L225 Difference]: With dead ends: 3232 [2021-01-20 11:32:31,853 INFO L226 Difference]: Without dead ends: 2974 [2021-01-20 11:32:31,853 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:31,853 INFO L78 Accepts]: Start accepts. Automaton has 2974 states. Word has length 38 [2021-01-20 11:32:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:31,854 INFO L481 AbstractCegarLoop]: Abstraction has 2974 states. [2021-01-20 11:32:31,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states. [2021-01-20 11:32:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:31,859 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:31,860 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:31,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 11:32:31,861 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 425976611, now seen corresponding path program 1 times [2021-01-20 11:32:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:31,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986462113] [2021-01-20 11:32:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986462113] [2021-01-20 11:32:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528839255] [2021-01-20 11:32:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:32:32,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:32,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:32,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 11:32:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203829843] [2021-01-20 11:32:32,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:32:32,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:32:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:32:32,198 INFO L87 Difference]: Start difference. First operand 2974 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:32,455 INFO L93 Difference]: Finished difference Result 3614 states and 9100 transitions. [2021-01-20 11:32:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:32:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:32,496 INFO L225 Difference]: With dead ends: 3614 [2021-01-20 11:32:32,496 INFO L226 Difference]: Without dead ends: 3134 [2021-01-20 11:32:32,497 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:32:32,498 INFO L78 Accepts]: Start accepts. Automaton has 3134 states. Word has length 38 [2021-01-20 11:32:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:32,499 INFO L481 AbstractCegarLoop]: Abstraction has 3134 states. [2021-01-20 11:32:32,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states. [2021-01-20 11:32:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:32,505 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:32,505 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:32,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:32,721 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash 662124847, now seen corresponding path program 2 times [2021-01-20 11:32:32,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:32,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058793134] [2021-01-20 11:32:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058793134] [2021-01-20 11:32:32,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274043271] [2021-01-20 11:32:32,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:32,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:32,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:32:32,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:33,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:33,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 11:32:33,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618861923] [2021-01-20 11:32:33,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:32:33,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:32:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:32:33,118 INFO L87 Difference]: Start difference. First operand 3134 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:33,385 INFO L93 Difference]: Finished difference Result 3774 states and 9420 transitions. [2021-01-20 11:32:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:33,410 INFO L225 Difference]: With dead ends: 3774 [2021-01-20 11:32:33,410 INFO L226 Difference]: Without dead ends: 3294 [2021-01-20 11:32:33,411 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:32:33,413 INFO L78 Accepts]: Start accepts. Automaton has 3294 states. Word has length 38 [2021-01-20 11:32:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:33,413 INFO L481 AbstractCegarLoop]: Abstraction has 3294 states. [2021-01-20 11:32:33,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states. [2021-01-20 11:32:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:33,418 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:33,418 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:33,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:33,630 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash 234007381, now seen corresponding path program 3 times [2021-01-20 11:32:33,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:33,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75833837] [2021-01-20 11:32:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75833837] [2021-01-20 11:32:33,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83704904] [2021-01-20 11:32:33,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:33,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:32:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:33,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:33,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:33,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-20 11:32:33,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313875324] [2021-01-20 11:32:33,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 11:32:33,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 11:32:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:33,984 INFO L87 Difference]: Start difference. First operand 3294 states. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:34,283 INFO L93 Difference]: Finished difference Result 3806 states and 9484 transitions. [2021-01-20 11:32:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 11:32:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:34,295 INFO L225 Difference]: With dead ends: 3806 [2021-01-20 11:32:34,295 INFO L226 Difference]: Without dead ends: 3484 [2021-01-20 11:32:34,296 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:34,296 INFO L78 Accepts]: Start accepts. Automaton has 3484 states. Word has length 38 [2021-01-20 11:32:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:34,297 INFO L481 AbstractCegarLoop]: Abstraction has 3484 states. [2021-01-20 11:32:34,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states. [2021-01-20 11:32:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:34,303 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:34,303 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:34,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:34,517 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-20 11:32:34,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:34,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043709266] [2021-01-20 11:32:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:34,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043709266] [2021-01-20 11:32:34,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204597853] [2021-01-20 11:32:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:34,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:35,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:35,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 11:32:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181696680] [2021-01-20 11:32:35,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 11:32:35,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 11:32:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:35,098 INFO L87 Difference]: Start difference. First operand 3484 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:35,294 INFO L93 Difference]: Finished difference Result 3676 states and 9127 transitions. [2021-01-20 11:32:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:35,304 INFO L225 Difference]: With dead ends: 3676 [2021-01-20 11:32:35,305 INFO L226 Difference]: Without dead ends: 3524 [2021-01-20 11:32:35,305 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:32:35,306 INFO L78 Accepts]: Start accepts. Automaton has 3524 states. Word has length 43 [2021-01-20 11:32:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:35,306 INFO L481 AbstractCegarLoop]: Abstraction has 3524 states. [2021-01-20 11:32:35,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states. [2021-01-20 11:32:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:35,312 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:35,312 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:35,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-20 11:32:35,521 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:35,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:35,522 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-20 11:32:35,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:35,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70339999] [2021-01-20 11:32:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70339999] [2021-01-20 11:32:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644027979] [2021-01-20 11:32:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:35,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:35,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:35,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:35,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:35,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:35,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017160631] [2021-01-20 11:32:35,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:35,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:35,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:35,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:35,898 INFO L87 Difference]: Start difference. First operand 3524 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:36,360 INFO L93 Difference]: Finished difference Result 4588 states and 11335 transitions. [2021-01-20 11:32:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:36,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:36,372 INFO L225 Difference]: With dead ends: 4588 [2021-01-20 11:32:36,372 INFO L226 Difference]: Without dead ends: 4224 [2021-01-20 11:32:36,373 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:36,373 INFO L78 Accepts]: Start accepts. Automaton has 4224 states. Word has length 43 [2021-01-20 11:32:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:36,373 INFO L481 AbstractCegarLoop]: Abstraction has 4224 states. [2021-01-20 11:32:36,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states. [2021-01-20 11:32:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:36,380 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:36,380 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:36,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:36,596 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-20 11:32:36,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:36,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743786659] [2021-01-20 11:32:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:36,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743786659] [2021-01-20 11:32:36,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359282109] [2021-01-20 11:32:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-01-20 11:32:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:36,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:36,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:37,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:37,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 11:32:37,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626178083] [2021-01-20 11:32:37,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 11:32:37,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:37,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 11:32:37,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:37,078 INFO L87 Difference]: Start difference. First operand 4224 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:37,453 INFO L93 Difference]: Finished difference Result 4856 states and 11805 transitions. [2021-01-20 11:32:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:32:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:37,465 INFO L225 Difference]: With dead ends: 4856 [2021-01-20 11:32:37,465 INFO L226 Difference]: Without dead ends: 4464 [2021-01-20 11:32:37,466 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:32:37,466 INFO L78 Accepts]: Start accepts. Automaton has 4464 states. Word has length 43 [2021-01-20 11:32:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:37,467 INFO L481 AbstractCegarLoop]: Abstraction has 4464 states. [2021-01-20 11:32:37,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states. [2021-01-20 11:32:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:37,473 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:37,473 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:37,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:37,687 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-20 11:32:37,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:37,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393785012] [2021-01-20 11:32:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393785012] [2021-01-20 11:32:37,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820676419] [2021-01-20 11:32:37,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:37,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:38,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:38,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:38,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-20 11:32:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893431368] [2021-01-20 11:32:38,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 11:32:38,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 11:32:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:38,111 INFO L87 Difference]: Start difference. First operand 4464 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:38,532 INFO L93 Difference]: Finished difference Result 5334 states and 12920 transitions. [2021-01-20 11:32:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:38,542 INFO L225 Difference]: With dead ends: 5334 [2021-01-20 11:32:38,542 INFO L226 Difference]: Without dead ends: 4854 [2021-01-20 11:32:38,543 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:32:38,543 INFO L78 Accepts]: Start accepts. Automaton has 4854 states. Word has length 43 [2021-01-20 11:32:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:38,544 INFO L481 AbstractCegarLoop]: Abstraction has 4854 states. [2021-01-20 11:32:38,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4854 states. [2021-01-20 11:32:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:38,549 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:38,550 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:38,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 11:32:38,763 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:38,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-20 11:32:38,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:38,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615470764] [2021-01-20 11:32:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:38,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615470764] [2021-01-20 11:32:38,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796750454] [2021-01-20 11:32:38,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:38,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:39,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:39,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:39,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:39,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175861742] [2021-01-20 11:32:39,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:39,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:39,146 INFO L87 Difference]: Start difference. First operand 4854 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:39,845 INFO L93 Difference]: Finished difference Result 6684 states and 16291 transitions. [2021-01-20 11:32:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:32:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:39,859 INFO L225 Difference]: With dead ends: 6684 [2021-01-20 11:32:39,859 INFO L226 Difference]: Without dead ends: 6044 [2021-01-20 11:32:39,860 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:32:39,860 INFO L78 Accepts]: Start accepts. Automaton has 6044 states. Word has length 43 [2021-01-20 11:32:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:39,861 INFO L481 AbstractCegarLoop]: Abstraction has 6044 states. [2021-01-20 11:32:39,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states. [2021-01-20 11:32:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:39,870 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:39,870 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:40,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 11:32:40,084 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-20 11:32:40,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:40,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305533305] [2021-01-20 11:32:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305533305] [2021-01-20 11:32:40,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36919810] [2021-01-20 11:32:40,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:40,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:40,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:40,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:40,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:40,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:40,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:40,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699900120] [2021-01-20 11:32:40,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:40,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:40,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:40,523 INFO L87 Difference]: Start difference. First operand 6044 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:40,888 INFO L93 Difference]: Finished difference Result 7116 states and 17151 transitions. [2021-01-20 11:32:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 11:32:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:40,904 INFO L225 Difference]: With dead ends: 7116 [2021-01-20 11:32:40,904 INFO L226 Difference]: Without dead ends: 6752 [2021-01-20 11:32:40,905 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-01-20 11:32:40,905 INFO L78 Accepts]: Start accepts. Automaton has 6752 states. Word has length 48 [2021-01-20 11:32:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:40,905 INFO L481 AbstractCegarLoop]: Abstraction has 6752 states. [2021-01-20 11:32:40,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6752 states. [2021-01-20 11:32:40,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:40,915 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:40,915 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:41,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 11:32:41,129 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:41,130 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-20 11:32:41,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:41,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778599810] [2021-01-20 11:32:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778599810] [2021-01-20 11:32:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987148270] [2021-01-20 11:32:41,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:41,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:41,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:41,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:41,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:41,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707931611] [2021-01-20 11:32:41,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:41,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:41,581 INFO L87 Difference]: Start difference. First operand 6752 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:41,843 INFO L93 Difference]: Finished difference Result 6944 states and 16613 transitions. [2021-01-20 11:32:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:41,855 INFO L225 Difference]: With dead ends: 6944 [2021-01-20 11:32:41,855 INFO L226 Difference]: Without dead ends: 6792 [2021-01-20 11:32:41,856 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:32:41,856 INFO L78 Accepts]: Start accepts. Automaton has 6792 states. Word has length 48 [2021-01-20 11:32:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:41,856 INFO L481 AbstractCegarLoop]: Abstraction has 6792 states. [2021-01-20 11:32:41,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states. [2021-01-20 11:32:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:41,867 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:41,867 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:42,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 11:32:42,081 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-20 11:32:42,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:42,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679161131] [2021-01-20 11:32:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679161131] [2021-01-20 11:32:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904997672] [2021-01-20 11:32:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:42,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:42,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:42,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:42,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:42,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690833547] [2021-01-20 11:32:42,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:42,484 INFO L87 Difference]: Start difference. First operand 6792 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:43,070 INFO L93 Difference]: Finished difference Result 7656 states and 18421 transitions. [2021-01-20 11:32:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:32:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:43,081 INFO L225 Difference]: With dead ends: 7656 [2021-01-20 11:32:43,081 INFO L226 Difference]: Without dead ends: 7292 [2021-01-20 11:32:43,082 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:32:43,082 INFO L78 Accepts]: Start accepts. Automaton has 7292 states. Word has length 48 [2021-01-20 11:32:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:43,082 INFO L481 AbstractCegarLoop]: Abstraction has 7292 states. [2021-01-20 11:32:43,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7292 states. [2021-01-20 11:32:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:43,091 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:43,091 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:43,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 11:32:43,306 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-20 11:32:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:43,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184497356] [2021-01-20 11:32:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184497356] [2021-01-20 11:32:43,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686269215] [2021-01-20 11:32:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:43,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:43,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:43,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530767954] [2021-01-20 11:32:43,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:43,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:43,722 INFO L87 Difference]: Start difference. First operand 7292 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:44,097 INFO L93 Difference]: Finished difference Result 7604 states and 18123 transitions. [2021-01-20 11:32:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:44,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:44,108 INFO L225 Difference]: With dead ends: 7604 [2021-01-20 11:32:44,108 INFO L226 Difference]: Without dead ends: 7452 [2021-01-20 11:32:44,109 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:32:44,109 INFO L78 Accepts]: Start accepts. Automaton has 7452 states. Word has length 48 [2021-01-20 11:32:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:44,110 INFO L481 AbstractCegarLoop]: Abstraction has 7452 states. [2021-01-20 11:32:44,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states. [2021-01-20 11:32:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:44,119 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:44,119 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:44,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:44,335 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-20 11:32:44,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:44,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276324442] [2021-01-20 11:32:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:44,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276324442] [2021-01-20 11:32:44,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333942517] [2021-01-20 11:32:44,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:44,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:44,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:44,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:44,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:44,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:44,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:44,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765862194] [2021-01-20 11:32:44,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:44,760 INFO L87 Difference]: Start difference. First operand 7452 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:45,199 INFO L93 Difference]: Finished difference Result 7684 states and 18283 transitions. [2021-01-20 11:32:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:45,209 INFO L225 Difference]: With dead ends: 7684 [2021-01-20 11:32:45,209 INFO L226 Difference]: Without dead ends: 7532 [2021-01-20 11:32:45,210 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:45,210 INFO L78 Accepts]: Start accepts. Automaton has 7532 states. Word has length 48 [2021-01-20 11:32:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:45,210 INFO L481 AbstractCegarLoop]: Abstraction has 7532 states. [2021-01-20 11:32:45,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7532 states. [2021-01-20 11:32:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:45,223 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:45,223 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:45,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:45,432 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:45,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-20 11:32:45,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:45,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477399615] [2021-01-20 11:32:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:45,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477399615] [2021-01-20 11:32:45,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764754194] [2021-01-20 11:32:45,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:45,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:45,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:45,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:45,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:45,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:45,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:45,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419257106] [2021-01-20 11:32:45,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:45,817 INFO L87 Difference]: Start difference. First operand 7532 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:46,684 INFO L93 Difference]: Finished difference Result 9136 states and 21761 transitions. [2021-01-20 11:32:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:32:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:46,696 INFO L225 Difference]: With dead ends: 9136 [2021-01-20 11:32:46,696 INFO L226 Difference]: Without dead ends: 8772 [2021-01-20 11:32:46,697 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:32:46,697 INFO L78 Accepts]: Start accepts. Automaton has 8772 states. Word has length 48 [2021-01-20 11:32:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:46,698 INFO L481 AbstractCegarLoop]: Abstraction has 8772 states. [2021-01-20 11:32:46,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states. [2021-01-20 11:32:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:46,707 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:46,708 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:46,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-20 11:32:46,921 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:46,922 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-20 11:32:46,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:46,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283521482] [2021-01-20 11:32:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283521482] [2021-01-20 11:32:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741284943] [2021-01-20 11:32:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:47,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:47,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:47,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:47,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004409923] [2021-01-20 11:32:47,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:47,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:47,273 INFO L87 Difference]: Start difference. First operand 8772 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:47,659 INFO L93 Difference]: Finished difference Result 9164 states and 21623 transitions. [2021-01-20 11:32:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:47,671 INFO L225 Difference]: With dead ends: 9164 [2021-01-20 11:32:47,671 INFO L226 Difference]: Without dead ends: 9012 [2021-01-20 11:32:47,672 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:32:47,672 INFO L78 Accepts]: Start accepts. Automaton has 9012 states. Word has length 48 [2021-01-20 11:32:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:47,672 INFO L481 AbstractCegarLoop]: Abstraction has 9012 states. [2021-01-20 11:32:47,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states. [2021-01-20 11:32:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:47,682 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:47,682 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:47,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:47,896 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-20 11:32:47,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:47,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219917178] [2021-01-20 11:32:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219917178] [2021-01-20 11:32:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647399468] [2021-01-20 11:32:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:48,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:48,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:48,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:48,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:48,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115642877] [2021-01-20 11:32:48,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:48,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:48,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:48,257 INFO L87 Difference]: Start difference. First operand 9012 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:48,805 INFO L93 Difference]: Finished difference Result 9404 states and 22103 transitions. [2021-01-20 11:32:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:32:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:48,818 INFO L225 Difference]: With dead ends: 9404 [2021-01-20 11:32:48,818 INFO L226 Difference]: Without dead ends: 9252 [2021-01-20 11:32:48,819 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:32:48,819 INFO L78 Accepts]: Start accepts. Automaton has 9252 states. Word has length 48 [2021-01-20 11:32:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:48,819 INFO L481 AbstractCegarLoop]: Abstraction has 9252 states. [2021-01-20 11:32:48,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states. [2021-01-20 11:32:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:48,830 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:48,830 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:49,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-20 11:32:49,045 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-20 11:32:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291078953] [2021-01-20 11:32:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291078953] [2021-01-20 11:32:49,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149705101] [2021-01-20 11:32:49,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:49,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:32:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:49,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:49,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:49,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:49,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635885130] [2021-01-20 11:32:49,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:49,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:49,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:49,459 INFO L87 Difference]: Start difference. First operand 9252 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:50,045 INFO L93 Difference]: Finished difference Result 9834 states and 23058 transitions. [2021-01-20 11:32:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:50,056 INFO L225 Difference]: With dead ends: 9834 [2021-01-20 11:32:50,056 INFO L226 Difference]: Without dead ends: 9682 [2021-01-20 11:32:50,057 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:32:50,057 INFO L78 Accepts]: Start accepts. Automaton has 9682 states. Word has length 48 [2021-01-20 11:32:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:50,057 INFO L481 AbstractCegarLoop]: Abstraction has 9682 states. [2021-01-20 11:32:50,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states. [2021-01-20 11:32:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:50,066 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:50,066 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:50,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 11:32:50,271 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-20 11:32:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:50,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772496634] [2021-01-20 11:32:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772496634] [2021-01-20 11:32:50,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93279671] [2021-01-20 11:32:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:50,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:50,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:50,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:50,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411368945] [2021-01-20 11:32:50,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:50,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:50,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:50,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:50,583 INFO L87 Difference]: Start difference. First operand 9682 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:51,644 INFO L93 Difference]: Finished difference Result 12196 states and 28643 transitions. [2021-01-20 11:32:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:32:51,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:51,657 INFO L225 Difference]: With dead ends: 12196 [2021-01-20 11:32:51,657 INFO L226 Difference]: Without dead ends: 11662 [2021-01-20 11:32:51,658 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:32:51,658 INFO L78 Accepts]: Start accepts. Automaton has 11662 states. Word has length 48 [2021-01-20 11:32:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:51,658 INFO L481 AbstractCegarLoop]: Abstraction has 11662 states. [2021-01-20 11:32:51,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11662 states. [2021-01-20 11:32:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:51,667 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:51,667 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:51,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 11:32:51,868 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-20 11:32:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:51,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668808493] [2021-01-20 11:32:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668808493] [2021-01-20 11:32:52,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700522950] [2021-01-20 11:32:52,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:52,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:32:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:52,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:52,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:52,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958080426] [2021-01-20 11:32:52,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:52,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:52,378 INFO L87 Difference]: Start difference. First operand 11662 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:52,690 INFO L93 Difference]: Finished difference Result 11854 states and 27668 transitions. [2021-01-20 11:32:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:52,704 INFO L225 Difference]: With dead ends: 11854 [2021-01-20 11:32:52,704 INFO L226 Difference]: Without dead ends: 11702 [2021-01-20 11:32:52,704 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:32:52,704 INFO L78 Accepts]: Start accepts. Automaton has 11702 states. Word has length 53 [2021-01-20 11:32:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:52,705 INFO L481 AbstractCegarLoop]: Abstraction has 11702 states. [2021-01-20 11:32:52,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 11702 states. [2021-01-20 11:32:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:52,716 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:52,716 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:52,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 11:32:52,918 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:52,919 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-20 11:32:52,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:52,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321645884] [2021-01-20 11:32:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321645884] [2021-01-20 11:32:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154984432] [2021-01-20 11:32:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:53,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:32:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:53,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:53,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:53,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:53,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:53,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4121051] [2021-01-20 11:32:53,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:53,390 INFO L87 Difference]: Start difference. First operand 11702 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:54,083 INFO L93 Difference]: Finished difference Result 12486 states and 29316 transitions. [2021-01-20 11:32:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:54,097 INFO L225 Difference]: With dead ends: 12486 [2021-01-20 11:32:54,097 INFO L226 Difference]: Without dead ends: 12122 [2021-01-20 11:32:54,098 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:32:54,098 INFO L78 Accepts]: Start accepts. Automaton has 12122 states. Word has length 53 [2021-01-20 11:32:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:54,098 INFO L481 AbstractCegarLoop]: Abstraction has 12122 states. [2021-01-20 11:32:54,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 12122 states. [2021-01-20 11:32:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:54,108 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:54,108 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:54,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 11:32:54,309 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:54,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-20 11:32:54,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:54,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224925357] [2021-01-20 11:32:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:54,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224925357] [2021-01-20 11:32:54,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922591742] [2021-01-20 11:32:54,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:54,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:54,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:54,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:54,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:54,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:54,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517087186] [2021-01-20 11:32:54,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:54,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:54,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:54,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:54,755 INFO L87 Difference]: Start difference. First operand 12122 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:55,390 INFO L93 Difference]: Finished difference Result 12434 states and 29018 transitions. [2021-01-20 11:32:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:32:55,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:55,403 INFO L225 Difference]: With dead ends: 12434 [2021-01-20 11:32:55,403 INFO L226 Difference]: Without dead ends: 12282 [2021-01-20 11:32:55,403 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:32:55,404 INFO L78 Accepts]: Start accepts. Automaton has 12282 states. Word has length 53 [2021-01-20 11:32:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:55,404 INFO L481 AbstractCegarLoop]: Abstraction has 12282 states. [2021-01-20 11:32:55,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 12282 states. [2021-01-20 11:32:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:55,418 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:55,418 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:55,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:55,623 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:55,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-20 11:32:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:55,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128918527] [2021-01-20 11:32:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128918527] [2021-01-20 11:32:55,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009515337] [2021-01-20 11:32:55,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:55,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:56,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:56,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:56,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835412450] [2021-01-20 11:32:56,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:56,083 INFO L87 Difference]: Start difference. First operand 12282 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:56,666 INFO L93 Difference]: Finished difference Result 12474 states and 29098 transitions. [2021-01-20 11:32:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:56,688 INFO L225 Difference]: With dead ends: 12474 [2021-01-20 11:32:56,688 INFO L226 Difference]: Without dead ends: 12322 [2021-01-20 11:32:56,689 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:32:56,689 INFO L78 Accepts]: Start accepts. Automaton has 12322 states. Word has length 53 [2021-01-20 11:32:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:56,689 INFO L481 AbstractCegarLoop]: Abstraction has 12322 states. [2021-01-20 11:32:56,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12322 states. [2021-01-20 11:32:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:56,701 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:56,701 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:56,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-20 11:32:56,916 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-20 11:32:56,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:56,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495158897] [2021-01-20 11:32:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:57,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495158897] [2021-01-20 11:32:57,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491906604] [2021-01-20 11:32:57,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:57,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:32:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:57,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:57,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:57,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:57,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129332004] [2021-01-20 11:32:57,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:57,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:57,421 INFO L87 Difference]: Start difference. First operand 12322 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:58,725 INFO L93 Difference]: Finished difference Result 14422 states and 33696 transitions. [2021-01-20 11:32:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:32:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:58,737 INFO L225 Difference]: With dead ends: 14422 [2021-01-20 11:32:58,738 INFO L226 Difference]: Without dead ends: 13882 [2021-01-20 11:32:58,739 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:32:58,739 INFO L78 Accepts]: Start accepts. Automaton has 13882 states. Word has length 53 [2021-01-20 11:32:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:58,739 INFO L481 AbstractCegarLoop]: Abstraction has 13882 states. [2021-01-20 11:32:58,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13882 states. [2021-01-20 11:32:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:58,751 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:58,751 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:32:58,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:58,965 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-20 11:32:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:58,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434567448] [2021-01-20 11:32:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434567448] [2021-01-20 11:32:59,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405202451] [2021-01-20 11:32:59,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:59,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:32:59,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:59,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:59,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:59,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:59,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:59,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:32:59,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326228876] [2021-01-20 11:32:59,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:32:59,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:32:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:32:59,469 INFO L87 Difference]: Start difference. First operand 13882 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:00,207 INFO L93 Difference]: Finished difference Result 14794 states and 34246 transitions. [2021-01-20 11:33:00,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:00,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:00,222 INFO L225 Difference]: With dead ends: 14794 [2021-01-20 11:33:00,222 INFO L226 Difference]: Without dead ends: 14402 [2021-01-20 11:33:00,223 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:33:00,223 INFO L78 Accepts]: Start accepts. Automaton has 14402 states. Word has length 53 [2021-01-20 11:33:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:00,223 INFO L481 AbstractCegarLoop]: Abstraction has 14402 states. [2021-01-20 11:33:00,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states. [2021-01-20 11:33:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:00,234 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:00,234 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:00,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-20 11:33:00,448 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-20 11:33:00,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:00,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076233122] [2021-01-20 11:33:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076233122] [2021-01-20 11:33:00,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390370839] [2021-01-20 11:33:00,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:00,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:00,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:00,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:00,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:00,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629674531] [2021-01-20 11:33:00,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:00,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:00,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:00,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:00,959 INFO L87 Difference]: Start difference. First operand 14402 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:01,780 INFO L93 Difference]: Finished difference Result 14874 states and 34278 transitions. [2021-01-20 11:33:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:33:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:01,797 INFO L225 Difference]: With dead ends: 14874 [2021-01-20 11:33:01,797 INFO L226 Difference]: Without dead ends: 14722 [2021-01-20 11:33:01,798 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:01,798 INFO L78 Accepts]: Start accepts. Automaton has 14722 states. Word has length 53 [2021-01-20 11:33:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:01,799 INFO L481 AbstractCegarLoop]: Abstraction has 14722 states. [2021-01-20 11:33:01,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 14722 states. [2021-01-20 11:33:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:01,810 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:01,810 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:02,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:02,025 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-20 11:33:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:02,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445904512] [2021-01-20 11:33:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:02,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445904512] [2021-01-20 11:33:02,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991817481] [2021-01-20 11:33:02,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:02,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:02,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:02,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052352164] [2021-01-20 11:33:02,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:02,628 INFO L87 Difference]: Start difference. First operand 14722 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:03,622 INFO L93 Difference]: Finished difference Result 15514 states and 35686 transitions. [2021-01-20 11:33:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:03,639 INFO L225 Difference]: With dead ends: 15514 [2021-01-20 11:33:03,639 INFO L226 Difference]: Without dead ends: 15122 [2021-01-20 11:33:03,640 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:33:03,640 INFO L78 Accepts]: Start accepts. Automaton has 15122 states. Word has length 53 [2021-01-20 11:33:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:03,640 INFO L481 AbstractCegarLoop]: Abstraction has 15122 states. [2021-01-20 11:33:03,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 15122 states. [2021-01-20 11:33:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:03,651 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:03,651 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:03,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-20 11:33:03,852 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-20 11:33:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:03,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009682244] [2021-01-20 11:33:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:04,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009682244] [2021-01-20 11:33:04,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206836278] [2021-01-20 11:33:04,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:04,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:04,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:04,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:04,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:04,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366486632] [2021-01-20 11:33:04,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:04,429 INFO L87 Difference]: Start difference. First operand 15122 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:05,767 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-20 11:33:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:06,412 INFO L93 Difference]: Finished difference Result 17452 states and 40231 transitions. [2021-01-20 11:33:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:33:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:06,431 INFO L225 Difference]: With dead ends: 17452 [2021-01-20 11:33:06,431 INFO L226 Difference]: Without dead ends: 16912 [2021-01-20 11:33:06,432 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 11:33:06,432 INFO L78 Accepts]: Start accepts. Automaton has 16912 states. Word has length 53 [2021-01-20 11:33:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:06,432 INFO L481 AbstractCegarLoop]: Abstraction has 16912 states. [2021-01-20 11:33:06,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 16912 states. [2021-01-20 11:33:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:06,445 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:06,445 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:06,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:06,646 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-20 11:33:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:06,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929712975] [2021-01-20 11:33:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:06,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929712975] [2021-01-20 11:33:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398527552] [2021-01-20 11:33:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:06,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:06,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:06,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:07,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:07,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:07,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002194292] [2021-01-20 11:33:07,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:07,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:07,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:07,147 INFO L87 Difference]: Start difference. First operand 16912 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:07,868 INFO L93 Difference]: Finished difference Result 17464 states and 39933 transitions. [2021-01-20 11:33:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:07,887 INFO L225 Difference]: With dead ends: 17464 [2021-01-20 11:33:07,887 INFO L226 Difference]: Without dead ends: 17312 [2021-01-20 11:33:07,888 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:33:07,888 INFO L78 Accepts]: Start accepts. Automaton has 17312 states. Word has length 53 [2021-01-20 11:33:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:07,888 INFO L481 AbstractCegarLoop]: Abstraction has 17312 states. [2021-01-20 11:33:07,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17312 states. [2021-01-20 11:33:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:07,901 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:07,902 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:08,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-20 11:33:08,103 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-20 11:33:08,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:08,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517366347] [2021-01-20 11:33:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517366347] [2021-01-20 11:33:08,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251823606] [2021-01-20 11:33:08,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:08,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:08,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:08,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:08,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:08,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800410024] [2021-01-20 11:33:08,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:08,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:08,586 INFO L87 Difference]: Start difference. First operand 17312 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:09,384 INFO L93 Difference]: Finished difference Result 17984 states and 41101 transitions. [2021-01-20 11:33:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:33:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:09,403 INFO L225 Difference]: With dead ends: 17984 [2021-01-20 11:33:09,403 INFO L226 Difference]: Without dead ends: 17592 [2021-01-20 11:33:09,404 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:09,404 INFO L78 Accepts]: Start accepts. Automaton has 17592 states. Word has length 53 [2021-01-20 11:33:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:09,404 INFO L481 AbstractCegarLoop]: Abstraction has 17592 states. [2021-01-20 11:33:09,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 17592 states. [2021-01-20 11:33:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:09,551 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:09,552 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:09,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:09,753 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-20 11:33:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:09,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429907057] [2021-01-20 11:33:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:09,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429907057] [2021-01-20 11:33:09,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809074635] [2021-01-20 11:33:09,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:09,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:10,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:10,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:10,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:10,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933262465] [2021-01-20 11:33:10,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:10,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:10,200 INFO L87 Difference]: Start difference. First operand 17592 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:11,046 INFO L93 Difference]: Finished difference Result 18144 states and 41293 transitions. [2021-01-20 11:33:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:11,064 INFO L225 Difference]: With dead ends: 18144 [2021-01-20 11:33:11,064 INFO L226 Difference]: Without dead ends: 17992 [2021-01-20 11:33:11,065 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:33:11,065 INFO L78 Accepts]: Start accepts. Automaton has 17992 states. Word has length 53 [2021-01-20 11:33:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:11,065 INFO L481 AbstractCegarLoop]: Abstraction has 17992 states. [2021-01-20 11:33:11,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 17992 states. [2021-01-20 11:33:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:11,076 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:11,076 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:11,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-20 11:33:11,277 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-20 11:33:11,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:11,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913192665] [2021-01-20 11:33:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:11,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913192665] [2021-01-20 11:33:11,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373209629] [2021-01-20 11:33:11,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:11,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:11,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:11,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:11,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:11,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578712706] [2021-01-20 11:33:11,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:11,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:11,769 INFO L87 Difference]: Start difference. First operand 17992 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:12,806 INFO L93 Difference]: Finished difference Result 18744 states and 42621 transitions. [2021-01-20 11:33:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:33:12,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:12,825 INFO L225 Difference]: With dead ends: 18744 [2021-01-20 11:33:12,825 INFO L226 Difference]: Without dead ends: 18352 [2021-01-20 11:33:12,826 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:33:12,826 INFO L78 Accepts]: Start accepts. Automaton has 18352 states. Word has length 53 [2021-01-20 11:33:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:12,826 INFO L481 AbstractCegarLoop]: Abstraction has 18352 states. [2021-01-20 11:33:12,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18352 states. [2021-01-20 11:33:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:12,837 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:12,838 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:13,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 11:33:13,038 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-20 11:33:13,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:13,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851752114] [2021-01-20 11:33:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851752114] [2021-01-20 11:33:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304900508] [2021-01-20 11:33:13,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:13,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:13,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:13,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:13,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676404182] [2021-01-20 11:33:13,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:13,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:13,601 INFO L87 Difference]: Start difference. First operand 18352 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:14,618 INFO L93 Difference]: Finished difference Result 18744 states and 42493 transitions. [2021-01-20 11:33:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:33:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:14,645 INFO L225 Difference]: With dead ends: 18744 [2021-01-20 11:33:14,645 INFO L226 Difference]: Without dead ends: 18592 [2021-01-20 11:33:14,647 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:33:14,647 INFO L78 Accepts]: Start accepts. Automaton has 18592 states. Word has length 53 [2021-01-20 11:33:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:14,647 INFO L481 AbstractCegarLoop]: Abstraction has 18592 states. [2021-01-20 11:33:14,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18592 states. [2021-01-20 11:33:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:14,663 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:14,663 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:14,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 11:33:14,879 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-20 11:33:14,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:14,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14300313] [2021-01-20 11:33:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:15,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14300313] [2021-01-20 11:33:15,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332664052] [2021-01-20 11:33:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:15,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:15,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:15,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:15,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:15,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:15,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:15,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155578740] [2021-01-20 11:33:15,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:15,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:15,309 INFO L87 Difference]: Start difference. First operand 18592 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:16,258 INFO L93 Difference]: Finished difference Result 19394 states and 44078 transitions. [2021-01-20 11:33:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:33:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:16,278 INFO L225 Difference]: With dead ends: 19394 [2021-01-20 11:33:16,279 INFO L226 Difference]: Without dead ends: 19242 [2021-01-20 11:33:16,279 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:33:16,279 INFO L78 Accepts]: Start accepts. Automaton has 19242 states. Word has length 53 [2021-01-20 11:33:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:16,280 INFO L481 AbstractCegarLoop]: Abstraction has 19242 states. [2021-01-20 11:33:16,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 19242 states. [2021-01-20 11:33:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:16,292 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:16,292 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:16,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 11:33:16,493 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-20 11:33:16,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:16,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900372066] [2021-01-20 11:33:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:16,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900372066] [2021-01-20 11:33:16,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620069554] [2021-01-20 11:33:16,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:16,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:16,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:16,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:16,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:16,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:16,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057512648] [2021-01-20 11:33:16,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:16,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:16,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:16,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:16,997 INFO L87 Difference]: Start difference. First operand 19242 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:18,895 INFO L93 Difference]: Finished difference Result 22670 states and 51588 transitions. [2021-01-20 11:33:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-20 11:33:18,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:18,917 INFO L225 Difference]: With dead ends: 22670 [2021-01-20 11:33:18,917 INFO L226 Difference]: Without dead ends: 21872 [2021-01-20 11:33:18,918 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=776, Invalid=3006, Unknown=0, NotChecked=0, Total=3782 [2021-01-20 11:33:18,918 INFO L78 Accepts]: Start accepts. Automaton has 21872 states. Word has length 53 [2021-01-20 11:33:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 21872 states. [2021-01-20 11:33:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21872 states. [2021-01-20 11:33:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:18,931 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:18,931 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:19,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:19,132 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-20 11:33:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:19,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764716109] [2021-01-20 11:33:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764716109] [2021-01-20 11:33:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080232888] [2021-01-20 11:33:19,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:19,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:19,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:19,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:19,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:19,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226072661] [2021-01-20 11:33:19,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:19,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:19,595 INFO L87 Difference]: Start difference. First operand 21872 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:20,792 INFO L93 Difference]: Finished difference Result 22504 states and 50773 transitions. [2021-01-20 11:33:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:33:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:20,814 INFO L225 Difference]: With dead ends: 22504 [2021-01-20 11:33:20,814 INFO L226 Difference]: Without dead ends: 22352 [2021-01-20 11:33:20,815 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:33:20,815 INFO L78 Accepts]: Start accepts. Automaton has 22352 states. Word has length 53 [2021-01-20 11:33:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:20,815 INFO L481 AbstractCegarLoop]: Abstraction has 22352 states. [2021-01-20 11:33:20,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22352 states. [2021-01-20 11:33:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:20,828 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:20,828 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:21,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-20 11:33:21,029 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-20 11:33:21,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:21,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425780687] [2021-01-20 11:33:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425780687] [2021-01-20 11:33:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614234692] [2021-01-20 11:33:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:21,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:21,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:21,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:21,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:21,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:21,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333668373] [2021-01-20 11:33:21,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:21,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:21,481 INFO L87 Difference]: Start difference. First operand 22352 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:22,959 INFO L93 Difference]: Finished difference Result 23414 states and 52688 transitions. [2021-01-20 11:33:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:33:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:22,984 INFO L225 Difference]: With dead ends: 23414 [2021-01-20 11:33:22,984 INFO L226 Difference]: Without dead ends: 23262 [2021-01-20 11:33:22,985 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:33:22,985 INFO L78 Accepts]: Start accepts. Automaton has 23262 states. Word has length 53 [2021-01-20 11:33:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:22,985 INFO L481 AbstractCegarLoop]: Abstraction has 23262 states. [2021-01-20 11:33:22,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 23262 states. [2021-01-20 11:33:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:23,003 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:23,003 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:23,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 11:33:23,207 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-20 11:33:23,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:23,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473457568] [2021-01-20 11:33:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473457568] [2021-01-20 11:33:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376660038] [2021-01-20 11:33:23,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:23,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:23,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:23,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:23,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:23,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:23,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:23,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581346200] [2021-01-20 11:33:23,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:23,781 INFO L87 Difference]: Start difference. First operand 23262 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:26,205 INFO L93 Difference]: Finished difference Result 27410 states and 62018 transitions. [2021-01-20 11:33:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 11:33:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:26,233 INFO L225 Difference]: With dead ends: 27410 [2021-01-20 11:33:26,233 INFO L226 Difference]: Without dead ends: 26612 [2021-01-20 11:33:26,235 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=883, Invalid=3277, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:33:26,235 INFO L78 Accepts]: Start accepts. Automaton has 26612 states. Word has length 53 [2021-01-20 11:33:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:26,235 INFO L481 AbstractCegarLoop]: Abstraction has 26612 states. [2021-01-20 11:33:26,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26612 states. [2021-01-20 11:33:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:26,251 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:26,252 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:26,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:26,460 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 25 times [2021-01-20 11:33:26,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:26,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087426889] [2021-01-20 11:33:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:26,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087426889] [2021-01-20 11:33:26,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744259266] [2021-01-20 11:33:26,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:26,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:26,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:26,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:26,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093178280] [2021-01-20 11:33:26,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:26,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:26,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:26,885 INFO L87 Difference]: Start difference. First operand 26612 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:27,580 INFO L93 Difference]: Finished difference Result 27644 states and 62003 transitions. [2021-01-20 11:33:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:33:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:27,606 INFO L225 Difference]: With dead ends: 27644 [2021-01-20 11:33:27,606 INFO L226 Difference]: Without dead ends: 27492 [2021-01-20 11:33:27,606 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:33:27,606 INFO L78 Accepts]: Start accepts. Automaton has 27492 states. Word has length 53 [2021-01-20 11:33:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:27,607 INFO L481 AbstractCegarLoop]: Abstraction has 27492 states. [2021-01-20 11:33:27,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 27492 states. [2021-01-20 11:33:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:27,621 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:27,622 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:27,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-20 11:33:27,822 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 26 times [2021-01-20 11:33:27,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:27,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842351036] [2021-01-20 11:33:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842351036] [2021-01-20 11:33:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011599273] [2021-01-20 11:33:27,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:28,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:28,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:28,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:28,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:28,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:28,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780392727] [2021-01-20 11:33:28,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:28,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:28,218 INFO L87 Difference]: Start difference. First operand 27492 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:28,841 INFO L93 Difference]: Finished difference Result 28284 states and 63283 transitions. [2021-01-20 11:33:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:28,870 INFO L225 Difference]: With dead ends: 28284 [2021-01-20 11:33:28,870 INFO L226 Difference]: Without dead ends: 28132 [2021-01-20 11:33:28,871 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:28,871 INFO L78 Accepts]: Start accepts. Automaton has 28132 states. Word has length 53 [2021-01-20 11:33:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:28,871 INFO L481 AbstractCegarLoop]: Abstraction has 28132 states. [2021-01-20 11:33:28,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 28132 states. [2021-01-20 11:33:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:28,886 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:28,886 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:29,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:29,101 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 27 times [2021-01-20 11:33:29,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:29,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654026570] [2021-01-20 11:33:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654026570] [2021-01-20 11:33:29,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551985428] [2021-01-20 11:33:29,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:29,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:33:29,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:29,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:29,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:29,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241568501] [2021-01-20 11:33:29,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:29,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:29,543 INFO L87 Difference]: Start difference. First operand 28132 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:30,246 INFO L93 Difference]: Finished difference Result 28364 states and 63443 transitions. [2021-01-20 11:33:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:33:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:30,276 INFO L225 Difference]: With dead ends: 28364 [2021-01-20 11:33:30,276 INFO L226 Difference]: Without dead ends: 28212 [2021-01-20 11:33:30,277 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 11:33:30,277 INFO L78 Accepts]: Start accepts. Automaton has 28212 states. Word has length 53 [2021-01-20 11:33:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:30,277 INFO L481 AbstractCegarLoop]: Abstraction has 28212 states. [2021-01-20 11:33:30,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28212 states. [2021-01-20 11:33:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:30,292 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:30,292 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:30,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-20 11:33:30,493 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:30,494 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 28 times [2021-01-20 11:33:30,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:30,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166679313] [2021-01-20 11:33:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166679313] [2021-01-20 11:33:30,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758064398] [2021-01-20 11:33:30,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:30,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:30,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:30,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:30,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:30,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499304353] [2021-01-20 11:33:30,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:30,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:30,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:30,929 INFO L87 Difference]: Start difference. First operand 28212 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:31,959 INFO L93 Difference]: Finished difference Result 28404 states and 63523 transitions. [2021-01-20 11:33:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:31,988 INFO L225 Difference]: With dead ends: 28404 [2021-01-20 11:33:31,988 INFO L226 Difference]: Without dead ends: 28252 [2021-01-20 11:33:31,988 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:31,988 INFO L78 Accepts]: Start accepts. Automaton has 28252 states. Word has length 53 [2021-01-20 11:33:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:31,989 INFO L481 AbstractCegarLoop]: Abstraction has 28252 states. [2021-01-20 11:33:31,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 28252 states. [2021-01-20 11:33:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:32,005 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:32,005 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:32,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:32,206 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 29 times [2021-01-20 11:33:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:32,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712898569] [2021-01-20 11:33:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:32,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712898569] [2021-01-20 11:33:32,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348824281] [2021-01-20 11:33:32,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:32,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:32,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:32,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:32,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895891537] [2021-01-20 11:33:32,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:32,618 INFO L87 Difference]: Start difference. First operand 28252 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:33,537 INFO L93 Difference]: Finished difference Result 28754 states and 64318 transitions. [2021-01-20 11:33:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:33,566 INFO L225 Difference]: With dead ends: 28754 [2021-01-20 11:33:33,566 INFO L226 Difference]: Without dead ends: 28602 [2021-01-20 11:33:33,567 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:33:33,567 INFO L78 Accepts]: Start accepts. Automaton has 28602 states. Word has length 53 [2021-01-20 11:33:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:33,567 INFO L481 AbstractCegarLoop]: Abstraction has 28602 states. [2021-01-20 11:33:33,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28602 states. [2021-01-20 11:33:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:33,583 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:33,583 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:33,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 11:33:33,784 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 30 times [2021-01-20 11:33:33,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:33,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772613285] [2021-01-20 11:33:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:33,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772613285] [2021-01-20 11:33:33,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694199779] [2021-01-20 11:33:33,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:34,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:33:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:34,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:34,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:34,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:34,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 11:33:34,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222017911] [2021-01-20 11:33:34,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 11:33:34,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 11:33:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 11:33:34,181 INFO L87 Difference]: Start difference. First operand 28602 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:35,835 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 11:33:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:35,868 INFO L93 Difference]: Finished difference Result 30782 states and 69076 transitions. [2021-01-20 11:33:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:33:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:33:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:35,896 INFO L225 Difference]: With dead ends: 30782 [2021-01-20 11:33:35,896 INFO L226 Difference]: Without dead ends: 30242 [2021-01-20 11:33:35,897 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 11:33:35,897 INFO L78 Accepts]: Start accepts. Automaton has 30242 states. Word has length 53 [2021-01-20 11:33:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:35,897 INFO L481 AbstractCegarLoop]: Abstraction has 30242 states. [2021-01-20 11:33:35,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30242 states. [2021-01-20 11:33:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:35,916 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:35,916 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:36,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 11:33:36,118 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-20 11:33:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:36,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651580898] [2021-01-20 11:33:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:36,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651580898] [2021-01-20 11:33:36,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957461834] [2021-01-20 11:33:36,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:36,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 11:33:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:36,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-20 11:33:36,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-01-20 11:33:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712092461] [2021-01-20 11:33:36,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:33:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:33:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:33:36,335 INFO L87 Difference]: Start difference. First operand 30242 states. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:36,722 INFO L93 Difference]: Finished difference Result 37182 states and 83907 transitions. [2021-01-20 11:33:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:33:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:36,778 INFO L225 Difference]: With dead ends: 37182 [2021-01-20 11:33:36,779 INFO L226 Difference]: Without dead ends: 36954 [2021-01-20 11:33:36,779 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:33:36,779 INFO L78 Accepts]: Start accepts. Automaton has 36954 states. Word has length 58 [2021-01-20 11:33:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:36,779 INFO L481 AbstractCegarLoop]: Abstraction has 36954 states. [2021-01-20 11:33:36,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 36954 states. [2021-01-20 11:33:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:36,813 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:36,813 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:37,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:37,027 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-20 11:33:37,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:37,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41556369] [2021-01-20 11:33:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:37,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41556369] [2021-01-20 11:33:37,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563570226] [2021-01-20 11:33:37,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:37,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:37,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:37,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:37,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:37,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:37,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076179511] [2021-01-20 11:33:37,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:37,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:37,588 INFO L87 Difference]: Start difference. First operand 36954 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:38,030 INFO L93 Difference]: Finished difference Result 37122 states and 83717 transitions. [2021-01-20 11:33:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:33:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:38,069 INFO L225 Difference]: With dead ends: 37122 [2021-01-20 11:33:38,069 INFO L226 Difference]: Without dead ends: 36989 [2021-01-20 11:33:38,069 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:33:38,069 INFO L78 Accepts]: Start accepts. Automaton has 36989 states. Word has length 58 [2021-01-20 11:33:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:38,070 INFO L481 AbstractCegarLoop]: Abstraction has 36989 states. [2021-01-20 11:33:38,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 36989 states. [2021-01-20 11:33:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:38,092 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:38,093 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:38,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-20 11:33:38,294 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-20 11:33:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:38,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568306849] [2021-01-20 11:33:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:38,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568306849] [2021-01-20 11:33:38,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22689406] [2021-01-20 11:33:38,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:38,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:38,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:38,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:38,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:38,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:38,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291657979] [2021-01-20 11:33:38,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:38,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:38,825 INFO L87 Difference]: Start difference. First operand 36989 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:39,433 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2021-01-20 11:33:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:40,097 INFO L93 Difference]: Finished difference Result 37805 states and 85510 transitions. [2021-01-20 11:33:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:33:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:40,140 INFO L225 Difference]: With dead ends: 37805 [2021-01-20 11:33:40,140 INFO L226 Difference]: Without dead ends: 37339 [2021-01-20 11:33:40,141 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=1420, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:33:40,141 INFO L78 Accepts]: Start accepts. Automaton has 37339 states. Word has length 58 [2021-01-20 11:33:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:40,141 INFO L481 AbstractCegarLoop]: Abstraction has 37339 states. [2021-01-20 11:33:40,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37339 states. [2021-01-20 11:33:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:40,170 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:40,170 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:40,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:40,379 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 31 times [2021-01-20 11:33:40,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:40,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930149942] [2021-01-20 11:33:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930149942] [2021-01-20 11:33:40,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472236265] [2021-01-20 11:33:40,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:40,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:40,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982318753] [2021-01-20 11:33:40,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:40,997 INFO L87 Difference]: Start difference. First operand 37339 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:42,857 INFO L93 Difference]: Finished difference Result 37762 states and 85236 transitions. [2021-01-20 11:33:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:42,900 INFO L225 Difference]: With dead ends: 37762 [2021-01-20 11:33:42,900 INFO L226 Difference]: Without dead ends: 37534 [2021-01-20 11:33:42,901 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:42,901 INFO L78 Accepts]: Start accepts. Automaton has 37534 states. Word has length 58 [2021-01-20 11:33:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:42,901 INFO L481 AbstractCegarLoop]: Abstraction has 37534 states. [2021-01-20 11:33:42,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37534 states. [2021-01-20 11:33:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:42,930 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:42,930 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:43,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:43,131 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:43,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 32 times [2021-01-20 11:33:43,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:43,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192552887] [2021-01-20 11:33:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192552887] [2021-01-20 11:33:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030903231] [2021-01-20 11:33:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:43,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:43,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:44,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:44,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:44,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628301947] [2021-01-20 11:33:44,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=339, Unknown=1, NotChecked=0, Total=420 [2021-01-20 11:33:44,503 INFO L87 Difference]: Start difference. First operand 37534 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:49,429 INFO L93 Difference]: Finished difference Result 37957 states and 85621 transitions. [2021-01-20 11:33:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:33:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:49,474 INFO L225 Difference]: With dead ends: 37957 [2021-01-20 11:33:49,475 INFO L226 Difference]: Without dead ends: 37729 [2021-01-20 11:33:49,476 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=1290, Unknown=1, NotChecked=0, Total=1640 [2021-01-20 11:33:49,477 INFO L78 Accepts]: Start accepts. Automaton has 37729 states. Word has length 58 [2021-01-20 11:33:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:49,477 INFO L481 AbstractCegarLoop]: Abstraction has 37729 states. [2021-01-20 11:33:49,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 37729 states. [2021-01-20 11:33:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:49,501 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:49,501 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:49,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 11:33:49,715 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1539877684, now seen corresponding path program 33 times [2021-01-20 11:33:49,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:49,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210355755] [2021-01-20 11:33:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:49,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210355755] [2021-01-20 11:33:49,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607079405] [2021-01-20 11:33:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:49,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:33:49,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:50,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:50,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:50,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:50,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880002334] [2021-01-20 11:33:50,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:50,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:50,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:50,289 INFO L87 Difference]: Start difference. First operand 37729 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:50,731 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-01-20 11:33:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:53,227 INFO L93 Difference]: Finished difference Result 38117 states and 85941 transitions. [2021-01-20 11:33:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:33:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:53,274 INFO L225 Difference]: With dead ends: 38117 [2021-01-20 11:33:53,274 INFO L226 Difference]: Without dead ends: 37889 [2021-01-20 11:33:53,274 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:33:53,274 INFO L78 Accepts]: Start accepts. Automaton has 37889 states. Word has length 58 [2021-01-20 11:33:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:53,275 INFO L481 AbstractCegarLoop]: Abstraction has 37889 states. [2021-01-20 11:33:53,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37889 states. [2021-01-20 11:33:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:53,298 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:53,298 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:53,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:53,499 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash -783876912, now seen corresponding path program 34 times [2021-01-20 11:33:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:53,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574956058] [2021-01-20 11:33:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:53,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574956058] [2021-01-20 11:33:53,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081129616] [2021-01-20 11:33:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:53,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:53,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:33:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:54,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:54,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:54,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:54,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:54,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821405217] [2021-01-20 11:33:54,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:54,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:54,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:54,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:54,127 INFO L87 Difference]: Start difference. First operand 37889 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:56,298 INFO L93 Difference]: Finished difference Result 38939 states and 88049 transitions. [2021-01-20 11:33:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 11:33:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:56,353 INFO L225 Difference]: With dead ends: 38939 [2021-01-20 11:33:56,353 INFO L226 Difference]: Without dead ends: 38319 [2021-01-20 11:33:56,354 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=712, Invalid=2594, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:33:56,354 INFO L78 Accepts]: Start accepts. Automaton has 38319 states. Word has length 58 [2021-01-20 11:33:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:56,354 INFO L481 AbstractCegarLoop]: Abstraction has 38319 states. [2021-01-20 11:33:56,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38319 states. [2021-01-20 11:33:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:56,556 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:56,557 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:56,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-20 11:33:56,764 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1112097722, now seen corresponding path program 35 times [2021-01-20 11:33:56,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:56,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173872731] [2021-01-20 11:33:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:57,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173872731] [2021-01-20 11:33:57,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123780210] [2021-01-20 11:33:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:57,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:33:57,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:57,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:57,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:57,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:57,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:57,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:57,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624082823] [2021-01-20 11:33:57,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:57,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:57,503 INFO L87 Difference]: Start difference. First operand 38319 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:58,543 INFO L93 Difference]: Finished difference Result 38757 states and 87386 transitions. [2021-01-20 11:33:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:58,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:58,581 INFO L225 Difference]: With dead ends: 38757 [2021-01-20 11:33:58,582 INFO L226 Difference]: Without dead ends: 38529 [2021-01-20 11:33:58,585 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:58,585 INFO L78 Accepts]: Start accepts. Automaton has 38529 states. Word has length 58 [2021-01-20 11:33:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:58,585 INFO L481 AbstractCegarLoop]: Abstraction has 38529 states. [2021-01-20 11:33:58,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 38529 states. [2021-01-20 11:33:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:58,608 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:58,608 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:58,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 11:33:58,809 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash 841175852, now seen corresponding path program 36 times [2021-01-20 11:33:58,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:58,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017584269] [2021-01-20 11:33:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017584269] [2021-01-20 11:33:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510435157] [2021-01-20 11:33:59,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:33:59,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:59,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:59,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:59,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:59,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380876175] [2021-01-20 11:33:59,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:59,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:59,465 INFO L87 Difference]: Start difference. First operand 38529 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:00,616 INFO L93 Difference]: Finished difference Result 39132 states and 88259 transitions. [2021-01-20 11:34:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:34:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:00,662 INFO L225 Difference]: With dead ends: 39132 [2021-01-20 11:34:00,663 INFO L226 Difference]: Without dead ends: 38714 [2021-01-20 11:34:00,663 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:34:00,663 INFO L78 Accepts]: Start accepts. Automaton has 38714 states. Word has length 58 [2021-01-20 11:34:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:00,663 INFO L481 AbstractCegarLoop]: Abstraction has 38714 states. [2021-01-20 11:34:00,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 38714 states. [2021-01-20 11:34:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:00,688 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:00,689 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:00,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 11:34:00,889 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 147775686, now seen corresponding path program 37 times [2021-01-20 11:34:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:00,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973411284] [2021-01-20 11:34:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:01,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973411284] [2021-01-20 11:34:01,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762197558] [2021-01-20 11:34:01,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:01,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:01,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:01,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:01,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:01,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:01,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38692219] [2021-01-20 11:34:01,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:01,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:01,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:01,566 INFO L87 Difference]: Start difference. First operand 38714 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:02,766 INFO L93 Difference]: Finished difference Result 39002 states and 87881 transitions. [2021-01-20 11:34:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:34:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:02,900 INFO L225 Difference]: With dead ends: 39002 [2021-01-20 11:34:02,900 INFO L226 Difference]: Without dead ends: 38774 [2021-01-20 11:34:02,900 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:34:02,900 INFO L78 Accepts]: Start accepts. Automaton has 38774 states. Word has length 58 [2021-01-20 11:34:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:02,901 INFO L481 AbstractCegarLoop]: Abstraction has 38774 states. [2021-01-20 11:34:02,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38774 states. [2021-01-20 11:34:02,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:02,921 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:02,921 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:03,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 11:34:03,122 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash -123146184, now seen corresponding path program 38 times [2021-01-20 11:34:03,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:03,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267811259] [2021-01-20 11:34:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267811259] [2021-01-20 11:34:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087717700] [2021-01-20 11:34:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:03,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:03,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:03,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:03,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199219549] [2021-01-20 11:34:03,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:03,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:03,784 INFO L87 Difference]: Start difference. First operand 38774 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:05,227 INFO L93 Difference]: Finished difference Result 39302 states and 88609 transitions. [2021-01-20 11:34:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:05,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:05,267 INFO L225 Difference]: With dead ends: 39302 [2021-01-20 11:34:05,268 INFO L226 Difference]: Without dead ends: 38884 [2021-01-20 11:34:05,268 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:34:05,268 INFO L78 Accepts]: Start accepts. Automaton has 38884 states. Word has length 58 [2021-01-20 11:34:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:05,268 INFO L481 AbstractCegarLoop]: Abstraction has 38884 states. [2021-01-20 11:34:05,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 38884 states. [2021-01-20 11:34:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:05,293 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:05,293 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:05,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:05,494 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1604977050, now seen corresponding path program 39 times [2021-01-20 11:34:05,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:05,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293186334] [2021-01-20 11:34:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:05,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293186334] [2021-01-20 11:34:05,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310611981] [2021-01-20 11:34:05,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:05,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:34:05,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:06,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:06,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:06,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:06,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:06,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:06,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395031660] [2021-01-20 11:34:06,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:06,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:06,098 INFO L87 Difference]: Start difference. First operand 38884 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:07,709 INFO L93 Difference]: Finished difference Result 39172 states and 88231 transitions. [2021-01-20 11:34:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:07,767 INFO L225 Difference]: With dead ends: 39172 [2021-01-20 11:34:07,767 INFO L226 Difference]: Without dead ends: 38944 [2021-01-20 11:34:07,768 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:34:07,768 INFO L78 Accepts]: Start accepts. Automaton has 38944 states. Word has length 58 [2021-01-20 11:34:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:07,768 INFO L481 AbstractCegarLoop]: Abstraction has 38944 states. [2021-01-20 11:34:07,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 38944 states. [2021-01-20 11:34:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:07,805 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:07,805 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:08,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:08,020 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2038566546, now seen corresponding path program 40 times [2021-01-20 11:34:08,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:08,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388936905] [2021-01-20 11:34:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388936905] [2021-01-20 11:34:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042894302] [2021-01-20 11:34:08,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:08,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:34:08,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:34:08,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:08,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:08,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:08,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:08,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169727472] [2021-01-20 11:34:08,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:08,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:08,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:08,602 INFO L87 Difference]: Start difference. First operand 38944 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:10,105 INFO L93 Difference]: Finished difference Result 39267 states and 88416 transitions. [2021-01-20 11:34:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:34:10,107 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:10,164 INFO L225 Difference]: With dead ends: 39267 [2021-01-20 11:34:10,164 INFO L226 Difference]: Without dead ends: 39039 [2021-01-20 11:34:10,165 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:34:10,165 INFO L78 Accepts]: Start accepts. Automaton has 39039 states. Word has length 58 [2021-01-20 11:34:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:10,165 INFO L481 AbstractCegarLoop]: Abstraction has 39039 states. [2021-01-20 11:34:10,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 39039 states. [2021-01-20 11:34:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:10,199 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:10,200 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:10,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:10,408 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1500399978, now seen corresponding path program 41 times [2021-01-20 11:34:10,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:10,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408478780] [2021-01-20 11:34:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408478780] [2021-01-20 11:34:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085297347] [2021-01-20 11:34:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:10,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:34:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:10,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:10,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:10,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:11,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:11,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:11,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889533705] [2021-01-20 11:34:11,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:11,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:11,109 INFO L87 Difference]: Start difference. First operand 39039 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:12,167 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-01-20 11:34:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:13,896 INFO L93 Difference]: Finished difference Result 40509 states and 91540 transitions. [2021-01-20 11:34:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-20 11:34:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:13,940 INFO L225 Difference]: With dead ends: 40509 [2021-01-20 11:34:13,940 INFO L226 Difference]: Without dead ends: 39709 [2021-01-20 11:34:13,941 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=823, Invalid=2959, Unknown=0, NotChecked=0, Total=3782 [2021-01-20 11:34:13,941 INFO L78 Accepts]: Start accepts. Automaton has 39709 states. Word has length 58 [2021-01-20 11:34:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:13,941 INFO L481 AbstractCegarLoop]: Abstraction has 39709 states. [2021-01-20 11:34:13,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 39709 states. [2021-01-20 11:34:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:13,969 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:13,969 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:14,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-20 11:34:14,170 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash 507842304, now seen corresponding path program 42 times [2021-01-20 11:34:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:14,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115422059] [2021-01-20 11:34:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:14,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115422059] [2021-01-20 11:34:14,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480270044] [2021-01-20 11:34:14,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:14,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:34:14,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:14,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:14,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:14,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:14,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752245124] [2021-01-20 11:34:14,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:14,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:14,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:14,858 INFO L87 Difference]: Start difference. First operand 39709 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:15,057 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2021-01-20 11:34:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:16,883 INFO L93 Difference]: Finished difference Result 40237 states and 90689 transitions. [2021-01-20 11:34:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:34:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:16,929 INFO L225 Difference]: With dead ends: 40237 [2021-01-20 11:34:16,929 INFO L226 Difference]: Without dead ends: 39819 [2021-01-20 11:34:16,929 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=616, Invalid=2140, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:34:16,929 INFO L78 Accepts]: Start accepts. Automaton has 39819 states. Word has length 58 [2021-01-20 11:34:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:16,930 INFO L481 AbstractCegarLoop]: Abstraction has 39819 states. [2021-01-20 11:34:16,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39819 states. [2021-01-20 11:34:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:16,962 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:16,962 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:17,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:17,163 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2065044128, now seen corresponding path program 43 times [2021-01-20 11:34:17,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:17,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035637529] [2021-01-20 11:34:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:17,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035637529] [2021-01-20 11:34:17,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385713503] [2021-01-20 11:34:17,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:17,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:17,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:17,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:17,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:17,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:17,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122163604] [2021-01-20 11:34:17,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:17,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:17,906 INFO L87 Difference]: Start difference. First operand 39819 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:19,796 INFO L93 Difference]: Finished difference Result 40347 states and 90919 transitions. [2021-01-20 11:34:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 11:34:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:34:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:19,838 INFO L225 Difference]: With dead ends: 40347 [2021-01-20 11:34:19,838 INFO L226 Difference]: Without dead ends: 39929 [2021-01-20 11:34:19,843 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 11:34:19,843 INFO L78 Accepts]: Start accepts. Automaton has 39929 states. Word has length 58 [2021-01-20 11:34:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:19,844 INFO L481 AbstractCegarLoop]: Abstraction has 39929 states. [2021-01-20 11:34:19,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 39929 states. [2021-01-20 11:34:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:19,871 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:19,871 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:34:20,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-20 11:34:20,072 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:20,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1309043356, now seen corresponding path program 44 times [2021-01-20 11:34:20,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:20,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216158453] [2021-01-20 11:34:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:20,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216158453] [2021-01-20 11:34:20,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623704633] [2021-01-20 11:34:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:34:20,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:20,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:20,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:20,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:20,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:20,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:20,925 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-01-20 11:34:25,108 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-20 11:34:25,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:25,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:25,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560601077] [2021-01-20 11:34:25,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:25,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=322, Unknown=1, NotChecked=0, Total=420 [2021-01-20 11:34:25,232 INFO L87 Difference]: Start difference. First operand 39929 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:34:32,583 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-01-20 11:34:37,692 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-01-20 11:34:40,240 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-20 11:34:44,858 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-20 11:34:51,845 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-20 11:35:00,009 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2021-01-20 11:35:04,736 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-20 11:35:23,304 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-01-20 11:36:10,609 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 47 [2021-01-20 11:36:16,970 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-20 11:36:21,464 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 34 [2021-01-20 11:36:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:21,606 INFO L93 Difference]: Finished difference Result 43441 states and 97958 transitions. [2021-01-20 11:36:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 11:36:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:21,646 INFO L225 Difference]: With dead ends: 43441 [2021-01-20 11:36:21,646 INFO L226 Difference]: Without dead ends: 42591 [2021-01-20 11:36:21,646 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 65.7s TimeCoverageRelationStatistics Valid=877, Invalid=3147, Unknown=8, NotChecked=0, Total=4032 [2021-01-20 11:36:21,646 INFO L78 Accepts]: Start accepts. Automaton has 42591 states. Word has length 58 [2021-01-20 11:36:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:21,646 INFO L481 AbstractCegarLoop]: Abstraction has 42591 states. [2021-01-20 11:36:21,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 42591 states. [2021-01-20 11:36:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:21,669 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:21,669 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:21,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:21,870 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:21,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:21,872 INFO L82 PathProgramCache]: Analyzing trace with hash -597019592, now seen corresponding path program 45 times [2021-01-20 11:36:21,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:21,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543403897] [2021-01-20 11:36:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:22,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543403897] [2021-01-20 11:36:22,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401029180] [2021-01-20 11:36:22,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:22,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:36:22,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:22,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:22,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:22,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:22,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:22,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056250904] [2021-01-20 11:36:22,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:22,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:22,568 INFO L87 Difference]: Start difference. First operand 42591 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:23,793 INFO L93 Difference]: Finished difference Result 43669 states and 98038 transitions. [2021-01-20 11:36:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:36:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:23,839 INFO L225 Difference]: With dead ends: 43669 [2021-01-20 11:36:23,839 INFO L226 Difference]: Without dead ends: 43251 [2021-01-20 11:36:23,840 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:36:23,840 INFO L78 Accepts]: Start accepts. Automaton has 43251 states. Word has length 58 [2021-01-20 11:36:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:23,840 INFO L481 AbstractCegarLoop]: Abstraction has 43251 states. [2021-01-20 11:36:23,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 43251 states. [2021-01-20 11:36:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:23,869 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:23,869 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:24,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-20 11:36:24,070 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash -867941462, now seen corresponding path program 46 times [2021-01-20 11:36:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:24,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679632675] [2021-01-20 11:36:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:24,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679632675] [2021-01-20 11:36:24,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946063682] [2021-01-20 11:36:24,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:24,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:24,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:24,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:36:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:24,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:24,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:24,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550253239] [2021-01-20 11:36:24,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:24,886 INFO L87 Difference]: Start difference. First operand 43251 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:26,358 INFO L93 Difference]: Finished difference Result 45353 states and 101818 transitions. [2021-01-20 11:36:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:36:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:26,407 INFO L225 Difference]: With dead ends: 45353 [2021-01-20 11:36:26,407 INFO L226 Difference]: Without dead ends: 44391 [2021-01-20 11:36:26,407 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:36:26,407 INFO L78 Accepts]: Start accepts. Automaton has 44391 states. Word has length 58 [2021-01-20 11:36:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:26,407 INFO L481 AbstractCegarLoop]: Abstraction has 44391 states. [2021-01-20 11:36:26,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 44391 states. [2021-01-20 11:36:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:26,435 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:26,435 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:26,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:26,636 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1582882476, now seen corresponding path program 47 times [2021-01-20 11:36:26,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:26,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610973018] [2021-01-20 11:36:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610973018] [2021-01-20 11:36:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088877645] [2021-01-20 11:36:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:26,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:36:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:27,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:27,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:27,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:27,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009287225] [2021-01-20 11:36:27,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:27,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:27,330 INFO L87 Difference]: Start difference. First operand 44391 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:28,242 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-01-20 11:36:28,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:28,977 INFO L93 Difference]: Finished difference Result 45674 states and 102133 transitions. [2021-01-20 11:36:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:36:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:29,025 INFO L225 Difference]: With dead ends: 45674 [2021-01-20 11:36:29,026 INFO L226 Difference]: Without dead ends: 45256 [2021-01-20 11:36:29,026 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:36:29,026 INFO L78 Accepts]: Start accepts. Automaton has 45256 states. Word has length 58 [2021-01-20 11:36:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:29,026 INFO L481 AbstractCegarLoop]: Abstraction has 45256 states. [2021-01-20 11:36:29,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 45256 states. [2021-01-20 11:36:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:29,053 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:29,054 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:29,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-20 11:36:29,255 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1311960606, now seen corresponding path program 48 times [2021-01-20 11:36:29,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:29,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222241457] [2021-01-20 11:36:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:29,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222241457] [2021-01-20 11:36:29,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782900978] [2021-01-20 11:36:29,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:29,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:36:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:29,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:29,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:29,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:29,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501495220] [2021-01-20 11:36:29,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:29,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:29,924 INFO L87 Difference]: Start difference. First operand 45256 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:31,737 INFO L93 Difference]: Finished difference Result 46439 states and 103772 transitions. [2021-01-20 11:36:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:36:31,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:31,781 INFO L225 Difference]: With dead ends: 46439 [2021-01-20 11:36:31,781 INFO L226 Difference]: Without dead ends: 45926 [2021-01-20 11:36:31,782 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:36:31,782 INFO L78 Accepts]: Start accepts. Automaton has 45926 states. Word has length 58 [2021-01-20 11:36:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:31,782 INFO L481 AbstractCegarLoop]: Abstraction has 45926 states. [2021-01-20 11:36:31,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 45926 states. [2021-01-20 11:36:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:31,806 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:31,806 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:32,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-20 11:36:32,007 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash -255638260, now seen corresponding path program 49 times [2021-01-20 11:36:32,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:32,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321346668] [2021-01-20 11:36:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:32,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321346668] [2021-01-20 11:36:32,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293946711] [2021-01-20 11:36:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:32,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:32,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:32,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:32,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688899167] [2021-01-20 11:36:32,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:32,652 INFO L87 Difference]: Start difference. First operand 45926 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:34,515 INFO L93 Difference]: Finished difference Result 47209 states and 105298 transitions. [2021-01-20 11:36:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:36:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:34,565 INFO L225 Difference]: With dead ends: 47209 [2021-01-20 11:36:34,565 INFO L226 Difference]: Without dead ends: 46791 [2021-01-20 11:36:34,565 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:36:34,566 INFO L78 Accepts]: Start accepts. Automaton has 46791 states. Word has length 58 [2021-01-20 11:36:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:34,566 INFO L481 AbstractCegarLoop]: Abstraction has 46791 states. [2021-01-20 11:36:34,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 46791 states. [2021-01-20 11:36:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:34,594 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:34,594 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:34,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:34,794 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash -526560130, now seen corresponding path program 50 times [2021-01-20 11:36:34,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:34,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981574048] [2021-01-20 11:36:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981574048] [2021-01-20 11:36:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637722273] [2021-01-20 11:36:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:35,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:36:35,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:35,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:35,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:35,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:35,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269282311] [2021-01-20 11:36:35,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:35,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:35,605 INFO L87 Difference]: Start difference. First operand 46791 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:37,444 INFO L93 Difference]: Finished difference Result 48273 states and 107838 transitions. [2021-01-20 11:36:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:36:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:37,494 INFO L225 Difference]: With dead ends: 48273 [2021-01-20 11:36:37,495 INFO L226 Difference]: Without dead ends: 47311 [2021-01-20 11:36:37,495 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=549, Invalid=2103, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:36:37,495 INFO L78 Accepts]: Start accepts. Automaton has 47311 states. Word has length 58 [2021-01-20 11:36:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:37,495 INFO L481 AbstractCegarLoop]: Abstraction has 47311 states. [2021-01-20 11:36:37,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 47311 states. [2021-01-20 11:36:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:37,534 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:37,534 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:37,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:37,748 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1950977952, now seen corresponding path program 51 times [2021-01-20 11:36:37,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:37,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601360820] [2021-01-20 11:36:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:37,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601360820] [2021-01-20 11:36:37,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322964111] [2021-01-20 11:36:37,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:38,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:36:38,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:38,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:38,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:38,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:38,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:38,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449748809] [2021-01-20 11:36:38,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:38,537 INFO L87 Difference]: Start difference. First operand 47311 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:40,407 INFO L93 Difference]: Finished difference Result 47839 states and 106608 transitions. [2021-01-20 11:36:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:36:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:40,458 INFO L225 Difference]: With dead ends: 47839 [2021-01-20 11:36:40,458 INFO L226 Difference]: Without dead ends: 47421 [2021-01-20 11:36:40,459 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:36:40,459 INFO L78 Accepts]: Start accepts. Automaton has 47421 states. Word has length 58 [2021-01-20 11:36:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:40,459 INFO L481 AbstractCegarLoop]: Abstraction has 47421 states. [2021-01-20 11:36:40,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47421 states. [2021-01-20 11:36:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:40,487 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:40,487 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:40,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-01-20 11:36:40,688 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1692565644, now seen corresponding path program 52 times [2021-01-20 11:36:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:40,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149955953] [2021-01-20 11:36:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:40,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149955953] [2021-01-20 11:36:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691850872] [2021-01-20 11:36:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:40,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:40,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:36:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:41,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:41,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:41,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:41,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519250521] [2021-01-20 11:36:41,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:41,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:41,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:41,350 INFO L87 Difference]: Start difference. First operand 47421 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:41,814 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-01-20 11:36:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:43,430 INFO L93 Difference]: Finished difference Result 48409 states and 107883 transitions. [2021-01-20 11:36:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:36:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:43,481 INFO L225 Difference]: With dead ends: 48409 [2021-01-20 11:36:43,482 INFO L226 Difference]: Without dead ends: 47991 [2021-01-20 11:36:43,482 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:36:43,482 INFO L78 Accepts]: Start accepts. Automaton has 47991 states. Word has length 58 [2021-01-20 11:36:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:43,482 INFO L481 AbstractCegarLoop]: Abstraction has 47991 states. [2021-01-20 11:36:43,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states. [2021-01-20 11:36:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:43,516 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:43,516 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:43,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:43,717 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1846400880, now seen corresponding path program 53 times [2021-01-20 11:36:43,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:43,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418414936] [2021-01-20 11:36:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:43,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418414936] [2021-01-20 11:36:43,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219224562] [2021-01-20 11:36:43,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:44,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:36:44,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:44,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:44,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:44,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:44,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:44,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:44,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152397358] [2021-01-20 11:36:44,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:44,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:44,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:44,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:44,443 INFO L87 Difference]: Start difference. First operand 47991 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:45,771 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2021-01-20 11:36:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:47,498 INFO L93 Difference]: Finished difference Result 51108 states and 114442 transitions. [2021-01-20 11:36:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 11:36:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:47,574 INFO L225 Difference]: With dead ends: 51108 [2021-01-20 11:36:47,575 INFO L226 Difference]: Without dead ends: 49791 [2021-01-20 11:36:47,575 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:36:47,575 INFO L78 Accepts]: Start accepts. Automaton has 49791 states. Word has length 58 [2021-01-20 11:36:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:47,576 INFO L481 AbstractCegarLoop]: Abstraction has 49791 states. [2021-01-20 11:36:47,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 49791 states. [2021-01-20 11:36:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:47,605 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:47,605 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:47,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-20 11:36:47,806 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:47,807 INFO L82 PathProgramCache]: Analyzing trace with hash 161841402, now seen corresponding path program 54 times [2021-01-20 11:36:47,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:47,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424012867] [2021-01-20 11:36:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:48,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424012867] [2021-01-20 11:36:48,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086744276] [2021-01-20 11:36:48,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:48,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:36:48,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:48,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:48,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:48,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:48,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996604988] [2021-01-20 11:36:48,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:48,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:48,674 INFO L87 Difference]: Start difference. First operand 49791 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:51,018 INFO L93 Difference]: Finished difference Result 51124 states and 113867 transitions. [2021-01-20 11:36:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:36:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:51,074 INFO L225 Difference]: With dead ends: 51124 [2021-01-20 11:36:51,074 INFO L226 Difference]: Without dead ends: 50611 [2021-01-20 11:36:51,074 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:36:51,074 INFO L78 Accepts]: Start accepts. Automaton has 50611 states. Word has length 58 [2021-01-20 11:36:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:51,075 INFO L481 AbstractCegarLoop]: Abstraction has 50611 states. [2021-01-20 11:36:51,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50611 states. [2021-01-20 11:36:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:51,103 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:51,104 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:51,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:51,305 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1883922266, now seen corresponding path program 55 times [2021-01-20 11:36:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:51,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986291255] [2021-01-20 11:36:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:51,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986291255] [2021-01-20 11:36:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702377366] [2021-01-20 11:36:51,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:51,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:52,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:52,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844537289] [2021-01-20 11:36:52,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:52,033 INFO L87 Difference]: Start difference. First operand 50611 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:54,194 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2021-01-20 11:36:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:54,861 INFO L93 Difference]: Finished difference Result 53361 states and 119083 transitions. [2021-01-20 11:36:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 11:36:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:54,920 INFO L225 Difference]: With dead ends: 53361 [2021-01-20 11:36:54,920 INFO L226 Difference]: Without dead ends: 52311 [2021-01-20 11:36:54,920 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:36:54,921 INFO L78 Accepts]: Start accepts. Automaton has 52311 states. Word has length 58 [2021-01-20 11:36:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:54,921 INFO L481 AbstractCegarLoop]: Abstraction has 52311 states. [2021-01-20 11:36:54,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52311 states. [2021-01-20 11:36:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:54,949 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:54,950 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:55,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-20 11:36:55,150 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1655044258, now seen corresponding path program 56 times [2021-01-20 11:36:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:55,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263035426] [2021-01-20 11:36:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:55,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263035426] [2021-01-20 11:36:55,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975651036] [2021-01-20 11:36:55,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:55,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:36:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:55,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:55,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:55,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:55,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47414862] [2021-01-20 11:36:55,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:55,774 INFO L87 Difference]: Start difference. First operand 52311 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:59,344 INFO L93 Difference]: Finished difference Result 57396 states and 128311 transitions. [2021-01-20 11:36:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-20 11:36:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:36:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:59,407 INFO L225 Difference]: With dead ends: 57396 [2021-01-20 11:36:59,407 INFO L226 Difference]: Without dead ends: 56006 [2021-01-20 11:36:59,407 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1224, Invalid=4628, Unknown=0, NotChecked=0, Total=5852 [2021-01-20 11:36:59,407 INFO L78 Accepts]: Start accepts. Automaton has 56006 states. Word has length 58 [2021-01-20 11:36:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:59,408 INFO L481 AbstractCegarLoop]: Abstraction has 56006 states. [2021-01-20 11:36:59,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 56006 states. [2021-01-20 11:36:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:59,437 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:59,437 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:59,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:59,638 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:59,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1791249794, now seen corresponding path program 57 times [2021-01-20 11:36:59,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:59,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623153278] [2021-01-20 11:36:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:59,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623153278] [2021-01-20 11:36:59,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165906659] [2021-01-20 11:36:59,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:36:59,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:36:59,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:59,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:59,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:00,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:00,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:00,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:00,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:00,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:00,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885444145] [2021-01-20 11:37:00,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:00,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:00,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:00,365 INFO L87 Difference]: Start difference. First operand 56006 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:03,096 INFO L93 Difference]: Finished difference Result 57819 states and 128383 transitions. [2021-01-20 11:37:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:37:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:03,159 INFO L225 Difference]: With dead ends: 57819 [2021-01-20 11:37:03,159 INFO L226 Difference]: Without dead ends: 57401 [2021-01-20 11:37:03,160 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:37:03,160 INFO L78 Accepts]: Start accepts. Automaton has 57401 states. Word has length 58 [2021-01-20 11:37:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:03,160 INFO L481 AbstractCegarLoop]: Abstraction has 57401 states. [2021-01-20 11:37:03,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 57401 states. [2021-01-20 11:37:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:03,188 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:03,188 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:03,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-20 11:37:03,389 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1035249022, now seen corresponding path program 58 times [2021-01-20 11:37:03,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:03,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637777] [2021-01-20 11:37:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637777] [2021-01-20 11:37:03,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962328661] [2021-01-20 11:37:03,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:03,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:37:03,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:03,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:37:03,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:04,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:37:04,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:37:04,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:37:04,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:04,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:04,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:04,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666755061] [2021-01-20 11:37:04,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:04,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:04,249 INFO L87 Difference]: Start difference. First operand 57401 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:07,795 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-01-20 11:37:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:09,037 INFO L93 Difference]: Finished difference Result 60656 states and 135327 transitions. [2021-01-20 11:37:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 11:37:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:09,132 INFO L225 Difference]: With dead ends: 60656 [2021-01-20 11:37:09,132 INFO L226 Difference]: Without dead ends: 59641 [2021-01-20 11:37:09,133 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 11:37:09,133 INFO L78 Accepts]: Start accepts. Automaton has 59641 states. Word has length 58 [2021-01-20 11:37:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:09,133 INFO L481 AbstractCegarLoop]: Abstraction has 59641 states. [2021-01-20 11:37:09,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 59641 states. [2021-01-20 11:37:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:09,177 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:09,178 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:09,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:09,392 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash -313056756, now seen corresponding path program 59 times [2021-01-20 11:37:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:09,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211430534] [2021-01-20 11:37:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:09,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211430534] [2021-01-20 11:37:09,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904123530] [2021-01-20 11:37:09,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:09,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:37:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:09,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:09,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:10,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:10,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:10,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:10,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:10,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094676526] [2021-01-20 11:37:10,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:10,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:10,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:10,167 INFO L87 Difference]: Start difference. First operand 59641 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:12,743 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2021-01-20 11:37:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:14,256 INFO L93 Difference]: Finished difference Result 64207 states and 143804 transitions. [2021-01-20 11:37:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 11:37:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:14,346 INFO L225 Difference]: With dead ends: 64207 [2021-01-20 11:37:14,346 INFO L226 Difference]: Without dead ends: 62711 [2021-01-20 11:37:14,346 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 11:37:14,347 INFO L78 Accepts]: Start accepts. Automaton has 62711 states. Word has length 58 [2021-01-20 11:37:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:14,347 INFO L481 AbstractCegarLoop]: Abstraction has 62711 states. [2021-01-20 11:37:14,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 62711 states. [2021-01-20 11:37:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:14,386 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:14,387 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:14,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:14,602 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 828546426, now seen corresponding path program 60 times [2021-01-20 11:37:14,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:14,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081492441] [2021-01-20 11:37:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081492441] [2021-01-20 11:37:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130942170] [2021-01-20 11:37:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:14,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:37:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:15,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:15,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:15,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:15,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:15,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:15,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33815532] [2021-01-20 11:37:15,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:15,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:15,328 INFO L87 Difference]: Start difference. First operand 62711 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:16,792 INFO L93 Difference]: Finished difference Result 64149 states and 142827 transitions. [2021-01-20 11:37:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:37:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:16,868 INFO L225 Difference]: With dead ends: 64149 [2021-01-20 11:37:16,869 INFO L226 Difference]: Without dead ends: 63636 [2021-01-20 11:37:16,869 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:37:16,869 INFO L78 Accepts]: Start accepts. Automaton has 63636 states. Word has length 58 [2021-01-20 11:37:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:16,869 INFO L481 AbstractCegarLoop]: Abstraction has 63636 states. [2021-01-20 11:37:16,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 63636 states. [2021-01-20 11:37:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:16,905 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:16,905 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:17,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:17,106 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1845470330, now seen corresponding path program 61 times [2021-01-20 11:37:17,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:17,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762706244] [2021-01-20 11:37:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:17,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762706244] [2021-01-20 11:37:17,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903564840] [2021-01-20 11:37:17,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:18,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:18,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:18,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:18,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:18,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:18,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138429377] [2021-01-20 11:37:18,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:18,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:18,211 INFO L87 Difference]: Start difference. First operand 63636 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:19,767 INFO L93 Difference]: Finished difference Result 65054 states and 144682 transitions. [2021-01-20 11:37:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:37:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:19,873 INFO L225 Difference]: With dead ends: 65054 [2021-01-20 11:37:19,873 INFO L226 Difference]: Without dead ends: 64541 [2021-01-20 11:37:19,873 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:37:19,873 INFO L78 Accepts]: Start accepts. Automaton has 64541 states. Word has length 58 [2021-01-20 11:37:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:19,874 INFO L481 AbstractCegarLoop]: Abstraction has 64541 states. [2021-01-20 11:37:19,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64541 states. [2021-01-20 11:37:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:19,917 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:19,917 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:20,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:20,132 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1544097498, now seen corresponding path program 62 times [2021-01-20 11:37:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:20,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454619282] [2021-01-20 11:37:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:20,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454619282] [2021-01-20 11:37:20,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780731380] [2021-01-20 11:37:20,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:20,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:37:20,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:20,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:20,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:20,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:20,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:20,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:20,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71499627] [2021-01-20 11:37:20,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:20,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:20,957 INFO L87 Difference]: Start difference. First operand 64541 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:22,598 INFO L93 Difference]: Finished difference Result 65389 states and 145367 transitions. [2021-01-20 11:37:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:37:22,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:22,848 INFO L225 Difference]: With dead ends: 65389 [2021-01-20 11:37:22,848 INFO L226 Difference]: Without dead ends: 64876 [2021-01-20 11:37:22,848 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:37:22,849 INFO L78 Accepts]: Start accepts. Automaton has 64876 states. Word has length 58 [2021-01-20 11:37:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:22,849 INFO L481 AbstractCegarLoop]: Abstraction has 64876 states. [2021-01-20 11:37:22,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 64876 states. [2021-01-20 11:37:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:22,891 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:22,891 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:23,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:23,104 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -660751790, now seen corresponding path program 63 times [2021-01-20 11:37:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:23,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382649644] [2021-01-20 11:37:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:23,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382649644] [2021-01-20 11:37:23,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127830015] [2021-01-20 11:37:23,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:23,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:37:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:23,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:23,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:23,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:24,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:24,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:24,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657117085] [2021-01-20 11:37:24,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:24,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:24,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:24,037 INFO L87 Difference]: Start difference. First operand 64876 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:25,904 INFO L93 Difference]: Finished difference Result 65724 states and 146052 transitions. [2021-01-20 11:37:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 11:37:25,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:25,998 INFO L225 Difference]: With dead ends: 65724 [2021-01-20 11:37:25,998 INFO L226 Difference]: Without dead ends: 65211 [2021-01-20 11:37:25,999 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:37:25,999 INFO L78 Accepts]: Start accepts. Automaton has 65211 states. Word has length 58 [2021-01-20 11:37:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:25,999 INFO L481 AbstractCegarLoop]: Abstraction has 65211 states. [2021-01-20 11:37:25,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 65211 states. [2021-01-20 11:37:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:26,041 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:26,041 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:26,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:26,254 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:26,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1809295968, now seen corresponding path program 64 times [2021-01-20 11:37:26,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:26,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204363558] [2021-01-20 11:37:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204363558] [2021-01-20 11:37:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089586586] [2021-01-20 11:37:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:26,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:37:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:26,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:37:26,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:27,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:27,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:27,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:27,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:27,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:27,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:27,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130130735] [2021-01-20 11:37:27,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:27,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:27,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:27,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:27,219 INFO L87 Difference]: Start difference. First operand 65211 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:30,763 INFO L93 Difference]: Finished difference Result 69841 states and 155534 transitions. [2021-01-20 11:37:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-20 11:37:30,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:30,841 INFO L225 Difference]: With dead ends: 69841 [2021-01-20 11:37:30,841 INFO L226 Difference]: Without dead ends: 68841 [2021-01-20 11:37:30,842 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=869, Invalid=3163, Unknown=0, NotChecked=0, Total=4032 [2021-01-20 11:37:30,842 INFO L78 Accepts]: Start accepts. Automaton has 68841 states. Word has length 58 [2021-01-20 11:37:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:30,842 INFO L481 AbstractCegarLoop]: Abstraction has 68841 states. [2021-01-20 11:37:30,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68841 states. [2021-01-20 11:37:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:30,875 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:30,875 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:31,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:31,076 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:31,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1142254788, now seen corresponding path program 65 times [2021-01-20 11:37:31,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:31,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525578440] [2021-01-20 11:37:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:31,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525578440] [2021-01-20 11:37:31,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760068141] [2021-01-20 11:37:31,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:31,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:37:31,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:32,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:32,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:32,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:32,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533319194] [2021-01-20 11:37:32,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:32,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:32,549 INFO L87 Difference]: Start difference. First operand 68841 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:34,264 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2021-01-20 11:37:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:34,708 INFO L93 Difference]: Finished difference Result 69464 states and 154134 transitions. [2021-01-20 11:37:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:37:34,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:34,830 INFO L225 Difference]: With dead ends: 69464 [2021-01-20 11:37:34,831 INFO L226 Difference]: Without dead ends: 69141 [2021-01-20 11:37:34,831 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:37:34,835 INFO L78 Accepts]: Start accepts. Automaton has 69141 states. Word has length 58 [2021-01-20 11:37:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:34,835 INFO L481 AbstractCegarLoop]: Abstraction has 69141 states. [2021-01-20 11:37:34,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 69141 states. [2021-01-20 11:37:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:37:34,895 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:34,895 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:35,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-20 11:37:35,108 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1898255560, now seen corresponding path program 66 times [2021-01-20 11:37:35,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:35,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664939345] [2021-01-20 11:37:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:35,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664939345] [2021-01-20 11:37:35,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324313850] [2021-01-20 11:37:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:35,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:37:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:37:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:35,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:37:35,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:35,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:35,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:37:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423972798] [2021-01-20 11:37:35,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:37:35,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:37:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:37:36,006 INFO L87 Difference]: Start difference. First operand 69141 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:39,563 INFO L93 Difference]: Finished difference Result 71456 states and 158862 transitions. [2021-01-20 11:37:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:37:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:37:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:39,657 INFO L225 Difference]: With dead ends: 71456 [2021-01-20 11:37:39,657 INFO L226 Difference]: Without dead ends: 70756 [2021-01-20 11:37:39,658 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:37:39,658 INFO L78 Accepts]: Start accepts. Automaton has 70756 states. Word has length 58 [2021-01-20 11:37:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:39,658 INFO L481 AbstractCegarLoop]: Abstraction has 70756 states. [2021-01-20 11:37:39,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 70756 states. [2021-01-20 11:37:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:37:39,714 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:39,714 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:39,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:39,928 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1241373133, now seen corresponding path program 67 times [2021-01-20 11:37:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:39,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652763045] [2021-01-20 11:37:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:40,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652763045] [2021-01-20 11:37:40,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53452884] [2021-01-20 11:37:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:37:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:40,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:40,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:40,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:40,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:40,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:37:40,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384474429] [2021-01-20 11:37:40,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:37:40,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:40,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:37:40,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:37:40,876 INFO L87 Difference]: Start difference. First operand 70756 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:42,462 INFO L93 Difference]: Finished difference Result 71119 states and 157800 transitions. [2021-01-20 11:37:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:37:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:37:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:42,543 INFO L225 Difference]: With dead ends: 71119 [2021-01-20 11:37:42,543 INFO L226 Difference]: Without dead ends: 70891 [2021-01-20 11:37:42,543 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:37:42,543 INFO L78 Accepts]: Start accepts. Automaton has 70891 states. Word has length 63 [2021-01-20 11:37:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:42,543 INFO L481 AbstractCegarLoop]: Abstraction has 70891 states. [2021-01-20 11:37:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 70891 states. [2021-01-20 11:37:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:37:42,590 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:42,590 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:42,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-20 11:37:42,804 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1784254887, now seen corresponding path program 68 times [2021-01-20 11:37:42,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:42,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841662493] [2021-01-20 11:37:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:43,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841662493] [2021-01-20 11:37:43,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42266888] [2021-01-20 11:37:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:43,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:37:43,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:43,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:37:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:43,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:43,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:43,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:43,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:43,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:37:43,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099190874] [2021-01-20 11:37:43,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:37:43,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:37:43,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:37:43,982 INFO L87 Difference]: Start difference. First operand 70891 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:46,004 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-01-20 11:37:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:46,226 INFO L93 Difference]: Finished difference Result 71254 states and 158065 transitions. [2021-01-20 11:37:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:37:46,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:37:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:46,338 INFO L225 Difference]: With dead ends: 71254 [2021-01-20 11:37:46,338 INFO L226 Difference]: Without dead ends: 71026 [2021-01-20 11:37:46,339 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:37:46,339 INFO L78 Accepts]: Start accepts. Automaton has 71026 states. Word has length 63 [2021-01-20 11:37:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:46,339 INFO L481 AbstractCegarLoop]: Abstraction has 71026 states. [2021-01-20 11:37:46,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 71026 states. [2021-01-20 11:37:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:37:46,405 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:46,405 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:46,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:46,619 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -788631545, now seen corresponding path program 69 times [2021-01-20 11:37:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:46,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975887134] [2021-01-20 11:37:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:47,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975887134] [2021-01-20 11:37:47,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812799464] [2021-01-20 11:37:47,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:47,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:37:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:37:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:47,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:47,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:47,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:47,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:47,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:37:47,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477779334] [2021-01-20 11:37:47,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:37:47,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:47,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:37:47,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:37:47,867 INFO L87 Difference]: Start difference. First operand 71026 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:50,408 INFO L93 Difference]: Finished difference Result 71314 states and 158185 transitions. [2021-01-20 11:37:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:37:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:37:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:50,521 INFO L225 Difference]: With dead ends: 71314 [2021-01-20 11:37:50,521 INFO L226 Difference]: Without dead ends: 71086 [2021-01-20 11:37:50,522 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:37:50,522 INFO L78 Accepts]: Start accepts. Automaton has 71086 states. Word has length 63 [2021-01-20 11:37:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:50,522 INFO L481 AbstractCegarLoop]: Abstraction has 71086 states. [2021-01-20 11:37:50,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 71086 states. [2021-01-20 11:37:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:37:50,600 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:50,601 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:37:50,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:50,813 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -32630773, now seen corresponding path program 70 times [2021-01-20 11:37:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:50,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201863572] [2021-01-20 11:37:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:51,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201863572] [2021-01-20 11:37:51,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452937826] [2021-01-20 11:37:51,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:37:51,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:37:51,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:51,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:37:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:52,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:37:55,593 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-20 11:37:55,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:55,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:55,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:37:55,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742987741] [2021-01-20 11:37:55,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:37:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:55,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:37:55,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=384, Unknown=1, NotChecked=0, Total=506 [2021-01-20 11:37:55,611 INFO L87 Difference]: Start difference. First operand 71086 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:38:07,144 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-01-20 11:39:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:55,587 INFO L93 Difference]: Finished difference Result 72228 states and 160367 transitions. [2021-01-20 11:39:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:39:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:39:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:55,667 INFO L225 Difference]: With dead ends: 72228 [2021-01-20 11:39:55,668 INFO L226 Difference]: Without dead ends: 71732 [2021-01-20 11:39:55,668 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=722, Invalid=2692, Unknown=8, NotChecked=0, Total=3422 [2021-01-20 11:39:55,668 INFO L78 Accepts]: Start accepts. Automaton has 71732 states. Word has length 63 [2021-01-20 11:39:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:55,668 INFO L481 AbstractCegarLoop]: Abstraction has 71732 states. [2021-01-20 11:39:55,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 71732 states. [2021-01-20 11:39:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:55,718 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:55,718 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:39:55,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:55,920 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1863343861, now seen corresponding path program 71 times [2021-01-20 11:39:55,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:55,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308832775] [2021-01-20 11:39:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:56,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308832775] [2021-01-20 11:39:56,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937352249] [2021-01-20 11:39:56,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:39:56,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:39:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:39:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:56,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:56,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:56,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:57,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:57,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:39:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974463530] [2021-01-20 11:39:57,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:39:57,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:57,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:39:57,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:39:57,064 INFO L87 Difference]: Start difference. First operand 71732 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:59,523 INFO L93 Difference]: Finished difference Result 71975 states and 159594 transitions. [2021-01-20 11:39:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:39:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:39:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:59,639 INFO L225 Difference]: With dead ends: 71975 [2021-01-20 11:39:59,639 INFO L226 Difference]: Without dead ends: 71842 [2021-01-20 11:39:59,640 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=441, Invalid=1451, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:39:59,640 INFO L78 Accepts]: Start accepts. Automaton has 71842 states. Word has length 63 [2021-01-20 11:39:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:59,640 INFO L481 AbstractCegarLoop]: Abstraction has 71842 states. [2021-01-20 11:39:59,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 71842 states. [2021-01-20 11:39:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:59,966 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:59,966 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:00,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:00,171 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1592421991, now seen corresponding path program 72 times [2021-01-20 11:40:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64893284] [2021-01-20 11:40:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:00,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64893284] [2021-01-20 11:40:00,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216966518] [2021-01-20 11:40:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:40:00,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:40:00,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:00,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:03,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:03,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:03,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:03,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100981345] [2021-01-20 11:40:03,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:03,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:03,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:03,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=413, Unknown=1, NotChecked=0, Total=506 [2021-01-20 11:40:03,499 INFO L87 Difference]: Start difference. First operand 71842 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:09,569 INFO L93 Difference]: Finished difference Result 72537 states and 160932 transitions. [2021-01-20 11:40:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:40:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:09,652 INFO L225 Difference]: With dead ends: 72537 [2021-01-20 11:40:09,652 INFO L226 Difference]: Without dead ends: 72082 [2021-01-20 11:40:09,652 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=423, Invalid=1468, Unknown=1, NotChecked=0, Total=1892 [2021-01-20 11:40:09,652 INFO L78 Accepts]: Start accepts. Automaton has 72082 states. Word has length 63 [2021-01-20 11:40:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:09,652 INFO L481 AbstractCegarLoop]: Abstraction has 72082 states. [2021-01-20 11:40:09,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 72082 states. [2021-01-20 11:40:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:09,703 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:09,703 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:09,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:09,904 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 899021825, now seen corresponding path program 73 times [2021-01-20 11:40:09,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:09,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53683059] [2021-01-20 11:40:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:10,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53683059] [2021-01-20 11:40:10,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006187408] [2021-01-20 11:40:10,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:40:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:10,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:11,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:11,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:11,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:11,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:11,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:11,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718777168] [2021-01-20 11:40:11,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:11,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:11,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:11,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:11,109 INFO L87 Difference]: Start difference. First operand 72082 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:13,636 INFO L93 Difference]: Finished difference Result 72250 states and 160139 transitions. [2021-01-20 11:40:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:40:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:13,742 INFO L225 Difference]: With dead ends: 72250 [2021-01-20 11:40:13,742 INFO L226 Difference]: Without dead ends: 72117 [2021-01-20 11:40:13,743 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=469, Invalid=1787, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:40:13,743 INFO L78 Accepts]: Start accepts. Automaton has 72117 states. Word has length 63 [2021-01-20 11:40:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:13,743 INFO L481 AbstractCegarLoop]: Abstraction has 72117 states. [2021-01-20 11:40:13,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 72117 states. [2021-01-20 11:40:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:13,809 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:13,810 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:14,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:14,023 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:14,024 INFO L82 PathProgramCache]: Analyzing trace with hash 628099955, now seen corresponding path program 74 times [2021-01-20 11:40:14,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:14,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159650395] [2021-01-20 11:40:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159650395] [2021-01-20 11:40:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509277676] [2021-01-20 11:40:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:40:14,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:40:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:15,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:16,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:16,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993866482] [2021-01-20 11:40:16,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:16,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:16,231 INFO L87 Difference]: Start difference. First operand 72117 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:17,436 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-01-20 11:40:22,509 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-01-20 11:40:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:29,105 INFO L93 Difference]: Finished difference Result 72780 states and 161317 transitions. [2021-01-20 11:40:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:40:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:29,187 INFO L225 Difference]: With dead ends: 72780 [2021-01-20 11:40:29,187 INFO L226 Difference]: Without dead ends: 72457 [2021-01-20 11:40:29,188 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=523, Invalid=1926, Unknown=1, NotChecked=0, Total=2450 [2021-01-20 11:40:29,188 INFO L78 Accepts]: Start accepts. Automaton has 72457 states. Word has length 63 [2021-01-20 11:40:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:29,188 INFO L481 AbstractCegarLoop]: Abstraction has 72457 states. [2021-01-20 11:40:29,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 72457 states. [2021-01-20 11:40:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:29,239 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:29,239 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:29,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-01-20 11:40:29,440 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -853730911, now seen corresponding path program 75 times [2021-01-20 11:40:29,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:29,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878522910] [2021-01-20 11:40:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:29,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878522910] [2021-01-20 11:40:29,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922720674] [2021-01-20 11:40:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:40:29,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:40:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:30,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:30,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:30,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:30,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:30,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769444582] [2021-01-20 11:40:30,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:30,612 INFO L87 Difference]: Start difference. First operand 72457 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:33,896 INFO L93 Difference]: Finished difference Result 72625 states and 160884 transitions. [2021-01-20 11:40:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:40:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:34,013 INFO L225 Difference]: With dead ends: 72625 [2021-01-20 11:40:34,013 INFO L226 Difference]: Without dead ends: 72492 [2021-01-20 11:40:34,014 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:40:34,014 INFO L78 Accepts]: Start accepts. Automaton has 72492 states. Word has length 63 [2021-01-20 11:40:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:34,014 INFO L481 AbstractCegarLoop]: Abstraction has 72492 states. [2021-01-20 11:40:34,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 72492 states. [2021-01-20 11:40:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:34,084 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:34,084 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:34,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:34,297 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1505154611, now seen corresponding path program 76 times [2021-01-20 11:40:34,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:34,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301048793] [2021-01-20 11:40:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:34,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301048793] [2021-01-20 11:40:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346453703] [2021-01-20 11:40:34,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:40:34,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:40:34,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:35,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:35,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:35,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:35,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:35,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:35,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871673033] [2021-01-20 11:40:35,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:35,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:35,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:35,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:35,537 INFO L87 Difference]: Start difference. First operand 72492 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:36,123 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-01-20 11:40:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:39,329 INFO L93 Difference]: Finished difference Result 72660 states and 160949 transitions. [2021-01-20 11:40:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:40:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:39,445 INFO L225 Difference]: With dead ends: 72660 [2021-01-20 11:40:39,446 INFO L226 Difference]: Without dead ends: 72527 [2021-01-20 11:40:39,446 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=682, Invalid=2288, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 11:40:39,446 INFO L78 Accepts]: Start accepts. Automaton has 72527 states. Word has length 63 [2021-01-20 11:40:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:39,447 INFO L481 AbstractCegarLoop]: Abstraction has 72527 states. [2021-01-20 11:40:39,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 72527 states. [2021-01-20 11:40:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:39,689 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:39,690 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:39,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-01-20 11:40:39,908 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -749153839, now seen corresponding path program 77 times [2021-01-20 11:40:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:39,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144955988] [2021-01-20 11:40:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144955988] [2021-01-20 11:40:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910031906] [2021-01-20 11:40:40,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:40:40,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:40:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:42,836 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_div_aux_mod_v_~j~0_218_49_76_60 Int) (aux_div_aux_mod_aux_mod_v_~j~0_218_49_76_150 Int) (aux_div_v_~j~0_218_49 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_~j~0_218_49_76_150_52 Int)) (let ((.cse0 (* 3 aux_div_aux_div_aux_mod_v_~j~0_218_49_76_60)) (.cse2 (* 2 aux_div_aux_mod_aux_mod_v_~j~0_218_49_76_150)) (.cse3 (* 3 aux_div_v_~j~0_218_49)) (.cse1 (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_~j~0_218_49_76_150_52))) (and (< .cse0 (+ aux_div_aux_mod_aux_mod_v_~j~0_218_49_76_150 aux_div_aux_mod_aux_mod_aux_mod_v_~j~0_218_49_76_150_52 1)) (<= aux_div_v_~j~0_218_49 1) (<= 0 .cse1) (< .cse1 2) (< (+ .cse2 .cse3 .cse1) (+ c_~i~0 2)) (< (+ aux_div_aux_mod_aux_mod_v_~j~0_218_49_76_150 aux_div_aux_mod_aux_mod_aux_mod_v_~j~0_218_49_76_150_52) (+ .cse0 3)) (<= c_~i~0 (+ .cse2 .cse3 .cse1 1)) (<= c_~j~0 (+ aux_div_aux_mod_aux_mod_v_~j~0_218_49_76_150 c_~i~0)) (<= aux_div_aux_div_aux_mod_v_~j~0_218_49_76_60 1)))) is different from true [2021-01-20 11:40:42,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:42,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:40:43,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:43,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:43,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:40:43,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650982426] [2021-01-20 11:40:43,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:40:43,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:40:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=307, Unknown=1, NotChecked=38, Total=462 [2021-01-20 11:40:43,073 INFO L87 Difference]: Start difference. First operand 72527 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:44,024 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2021-01-20 11:40:44,288 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-01-20 11:40:44,727 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2021-01-20 11:40:45,027 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-01-20 11:40:49,689 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-01-20 11:40:53,919 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-01-20 11:41:03,454 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-01-20 11:41:05,462 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-20 11:41:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:06,858 INFO L93 Difference]: Finished difference Result 76691 states and 170030 transitions. [2021-01-20 11:41:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:41:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:06,951 INFO L225 Difference]: With dead ends: 76691 [2021-01-20 11:41:06,951 INFO L226 Difference]: Without dead ends: 76516 [2021-01-20 11:41:06,951 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=872, Invalid=2789, Unknown=3, NotChecked=118, Total=3782 [2021-01-20 11:41:06,952 INFO L78 Accepts]: Start accepts. Automaton has 76516 states. Word has length 63 [2021-01-20 11:41:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:06,952 INFO L481 AbstractCegarLoop]: Abstraction has 76516 states. [2021-01-20 11:41:06,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 76516 states. [2021-01-20 11:41:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:07,145 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:07,146 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:07,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:41:07,359 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1259088443, now seen corresponding path program 78 times [2021-01-20 11:41:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:07,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59330158] [2021-01-20 11:41:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:07,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59330158] [2021-01-20 11:41:07,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842611596] [2021-01-20 11:41:07,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:41:07,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:41:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:07,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:08,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:08,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:08,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:41:08,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614682524] [2021-01-20 11:41:08,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:41:08,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:41:08,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:41:08,975 INFO L87 Difference]: Start difference. First operand 76516 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:14,374 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-20 11:41:16,894 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 11 [2021-01-20 11:41:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:25,274 INFO L93 Difference]: Finished difference Result 77456 states and 171743 transitions. [2021-01-20 11:41:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:41:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:25,364 INFO L225 Difference]: With dead ends: 77456 [2021-01-20 11:41:25,364 INFO L226 Difference]: Without dead ends: 77001 [2021-01-20 11:41:25,364 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=679, Invalid=2513, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:41:25,364 INFO L78 Accepts]: Start accepts. Automaton has 77001 states. Word has length 63 [2021-01-20 11:41:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:25,365 INFO L481 AbstractCegarLoop]: Abstraction has 77001 states. [2021-01-20 11:41:25,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 77001 states. [2021-01-20 11:41:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:25,419 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:25,420 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:25,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-01-20 11:41:25,620 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1313797989, now seen corresponding path program 79 times [2021-01-20 11:41:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:25,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188215223] [2021-01-20 11:41:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188215223] [2021-01-20 11:41:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231359870] [2021-01-20 11:41:25,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:41:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:26,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:27,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:27,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:41:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690616516] [2021-01-20 11:41:27,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:41:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:41:27,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:41:27,012 INFO L87 Difference]: Start difference. First operand 77001 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:30,081 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-01-20 11:41:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:41:37,679 INFO L93 Difference]: Finished difference Result 77589 states and 171928 transitions. [2021-01-20 11:41:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 11:41:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:41:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:41:37,800 INFO L225 Difference]: With dead ends: 77589 [2021-01-20 11:41:37,801 INFO L226 Difference]: Without dead ends: 77266 [2021-01-20 11:41:37,801 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=598, Invalid=2054, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:41:37,801 INFO L78 Accepts]: Start accepts. Automaton has 77266 states. Word has length 63 [2021-01-20 11:41:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:41:37,802 INFO L481 AbstractCegarLoop]: Abstraction has 77266 states. [2021-01-20 11:41:37,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 77266 states. [2021-01-20 11:41:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:41:37,878 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:41:37,879 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:41:38,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-20 11:41:38,091 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:41:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:41:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash -557797217, now seen corresponding path program 80 times [2021-01-20 11:41:38,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:41:38,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435033095] [2021-01-20 11:41:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:41:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:41:38,492 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 11:41:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:38,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435033095] [2021-01-20 11:41:38,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338724884] [2021-01-20 11:41:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:41:39,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:41:39,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:41:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:41:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:41:44,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:44,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:41:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:41:44,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:41:44,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:41:44,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625013205] [2021-01-20 11:41:44,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:41:44,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:41:44,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:41:44,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=347, Unknown=2, NotChecked=0, Total=462 [2021-01-20 11:41:44,288 INFO L87 Difference]: Start difference. First operand 77266 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:41:45,541 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 15 [2021-01-20 11:41:45,761 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 22 [2021-01-20 11:41:48,423 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-20 11:41:53,117 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-01-20 11:41:54,220 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-20 11:42:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:00,742 INFO L93 Difference]: Finished difference Result 79879 states and 177539 transitions. [2021-01-20 11:42:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:42:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:01,006 INFO L225 Difference]: With dead ends: 79879 [2021-01-20 11:42:01,006 INFO L226 Difference]: Without dead ends: 79186 [2021-01-20 11:42:01,006 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=822, Invalid=2835, Unknown=3, NotChecked=0, Total=3660 [2021-01-20 11:42:01,006 INFO L78 Accepts]: Start accepts. Automaton has 79186 states. Word has length 63 [2021-01-20 11:42:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:01,007 INFO L481 AbstractCegarLoop]: Abstraction has 79186 states. [2021-01-20 11:42:01,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 79186 states. [2021-01-20 11:42:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:01,053 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:01,053 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:01,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-20 11:42:01,254 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:01,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:01,255 INFO L82 PathProgramCache]: Analyzing trace with hash 154226547, now seen corresponding path program 81 times [2021-01-20 11:42:01,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:01,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093762852] [2021-01-20 11:42:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:01,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093762852] [2021-01-20 11:42:01,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675691642] [2021-01-20 11:42:01,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:01,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:42:01,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:01,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:02,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:02,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:02,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:02,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:02,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:02,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262932195] [2021-01-20 11:42:02,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:02,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:02,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:02,483 INFO L87 Difference]: Start difference. First operand 79186 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:05,212 INFO L93 Difference]: Finished difference Result 79454 states and 176250 transitions. [2021-01-20 11:42:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:42:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:05,337 INFO L225 Difference]: With dead ends: 79454 [2021-01-20 11:42:05,338 INFO L226 Difference]: Without dead ends: 79321 [2021-01-20 11:42:05,338 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:42:05,338 INFO L78 Accepts]: Start accepts. Automaton has 79321 states. Word has length 63 [2021-01-20 11:42:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:05,338 INFO L481 AbstractCegarLoop]: Abstraction has 79321 states. [2021-01-20 11:42:05,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 79321 states. [2021-01-20 11:42:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:05,415 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:05,415 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:05,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:05,628 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash -116695323, now seen corresponding path program 82 times [2021-01-20 11:42:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:05,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573712417] [2021-01-20 11:42:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:06,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573712417] [2021-01-20 11:42:06,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780488407] [2021-01-20 11:42:06,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:42:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:07,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:07,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:07,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:07,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:07,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:07,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107168344] [2021-01-20 11:42:07,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:07,240 INFO L87 Difference]: Start difference. First operand 79321 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:08,484 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-01-20 11:42:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:11,005 INFO L93 Difference]: Finished difference Result 80395 states and 178234 transitions. [2021-01-20 11:42:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:42:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:11,134 INFO L225 Difference]: With dead ends: 80395 [2021-01-20 11:42:11,135 INFO L226 Difference]: Without dead ends: 80072 [2021-01-20 11:42:11,135 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:42:11,135 INFO L78 Accepts]: Start accepts. Automaton has 80072 states. Word has length 63 [2021-01-20 11:42:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:11,136 INFO L481 AbstractCegarLoop]: Abstraction has 80072 states. [2021-01-20 11:42:11,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 80072 states. [2021-01-20 11:42:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:11,217 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:11,217 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:11,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-01-20 11:42:11,431 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1960838681, now seen corresponding path program 83 times [2021-01-20 11:42:11,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:11,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117903882] [2021-01-20 11:42:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:11,820 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 11:42:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:12,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117903882] [2021-01-20 11:42:12,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818141300] [2021-01-20 11:42:12,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:12,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:42:12,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:12,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:13,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:13,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:13,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:13,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:13,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:13,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985644808] [2021-01-20 11:42:13,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:13,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:13,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:13,439 INFO L87 Difference]: Start difference. First operand 80072 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:17,082 INFO L93 Difference]: Finished difference Result 80340 states and 178001 transitions. [2021-01-20 11:42:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:42:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:17,192 INFO L225 Difference]: With dead ends: 80340 [2021-01-20 11:42:17,193 INFO L226 Difference]: Without dead ends: 80207 [2021-01-20 11:42:17,193 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=519, Invalid=1931, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 11:42:17,193 INFO L78 Accepts]: Start accepts. Automaton has 80207 states. Word has length 63 [2021-01-20 11:42:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 80207 states. [2021-01-20 11:42:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 80207 states. [2021-01-20 11:42:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:17,259 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:17,259 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:17,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:17,472 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2063206745, now seen corresponding path program 84 times [2021-01-20 11:42:17,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:17,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575767656] [2021-01-20 11:42:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575767656] [2021-01-20 11:42:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258307522] [2021-01-20 11:42:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:18,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:42:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:18,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:18,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:18,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:19,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:19,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974783103] [2021-01-20 11:42:19,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:19,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:19,025 INFO L87 Difference]: Start difference. First operand 80207 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:22,578 INFO L93 Difference]: Finished difference Result 80940 states and 179329 transitions. [2021-01-20 11:42:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:42:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:22,709 INFO L225 Difference]: With dead ends: 80940 [2021-01-20 11:42:22,709 INFO L226 Difference]: Without dead ends: 80617 [2021-01-20 11:42:22,709 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 11:42:22,710 INFO L78 Accepts]: Start accepts. Automaton has 80617 states. Word has length 63 [2021-01-20 11:42:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:22,710 INFO L481 AbstractCegarLoop]: Abstraction has 80617 states. [2021-01-20 11:42:22,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 80617 states. [2021-01-20 11:42:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:22,767 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:22,767 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:22,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-01-20 11:42:22,968 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 495607879, now seen corresponding path program 85 times [2021-01-20 11:42:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:22,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694867354] [2021-01-20 11:42:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:23,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694867354] [2021-01-20 11:42:23,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799334696] [2021-01-20 11:42:23,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:23,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:23,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:24,441 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-01-20 11:42:24,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:24,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:24,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:24,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:24,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:24,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588422519] [2021-01-20 11:42:24,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:24,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:24,557 INFO L87 Difference]: Start difference. First operand 80617 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:29,442 INFO L93 Difference]: Finished difference Result 80885 states and 179096 transitions. [2021-01-20 11:42:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:42:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:29,574 INFO L225 Difference]: With dead ends: 80885 [2021-01-20 11:42:29,575 INFO L226 Difference]: Without dead ends: 80752 [2021-01-20 11:42:29,575 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=702, Invalid=2490, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:42:29,575 INFO L78 Accepts]: Start accepts. Automaton has 80752 states. Word has length 63 [2021-01-20 11:42:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:29,576 INFO L481 AbstractCegarLoop]: Abstraction has 80752 states. [2021-01-20 11:42:29,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 80752 states. [2021-01-20 11:42:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:29,656 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:29,657 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:29,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:29,869 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:29,870 INFO L82 PathProgramCache]: Analyzing trace with hash 224686009, now seen corresponding path program 86 times [2021-01-20 11:42:29,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:29,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119742967] [2021-01-20 11:42:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119742967] [2021-01-20 11:42:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636975031] [2021-01-20 11:42:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:30,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:42:30,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:30,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:31,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:31,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:31,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:31,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:31,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:31,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094123092] [2021-01-20 11:42:31,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:31,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:31,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:31,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:31,488 INFO L87 Difference]: Start difference. First operand 80752 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:31,786 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2021-01-20 11:42:32,207 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2021-01-20 11:42:33,924 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-01-20 11:42:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:36,710 INFO L93 Difference]: Finished difference Result 81990 states and 181459 transitions. [2021-01-20 11:42:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 11:42:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:37,082 INFO L225 Difference]: With dead ends: 81990 [2021-01-20 11:42:37,082 INFO L226 Difference]: Without dead ends: 81667 [2021-01-20 11:42:37,083 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=643, Invalid=2327, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 11:42:37,083 INFO L78 Accepts]: Start accepts. Automaton has 81667 states. Word has length 63 [2021-01-20 11:42:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:37,086 INFO L481 AbstractCegarLoop]: Abstraction has 81667 states. [2021-01-20 11:42:37,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 81667 states. [2021-01-20 11:42:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:37,175 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:37,175 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:37,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:37,388 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1199731813, now seen corresponding path program 87 times [2021-01-20 11:42:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:37,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218721085] [2021-01-20 11:42:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:37,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218721085] [2021-01-20 11:42:37,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610206228] [2021-01-20 11:42:37,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:37,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:42:37,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:38,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:38,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:38,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:38,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:38,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808338047] [2021-01-20 11:42:38,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:38,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:38,825 INFO L87 Difference]: Start difference. First operand 81667 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:43,204 INFO L93 Difference]: Finished difference Result 81835 states and 181026 transitions. [2021-01-20 11:42:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:42:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:43,297 INFO L225 Difference]: With dead ends: 81835 [2021-01-20 11:42:43,298 INFO L226 Difference]: Without dead ends: 81702 [2021-01-20 11:42:43,298 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=758, Invalid=2548, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:42:43,298 INFO L78 Accepts]: Start accepts. Automaton has 81702 states. Word has length 63 [2021-01-20 11:42:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:43,298 INFO L481 AbstractCegarLoop]: Abstraction has 81702 states. [2021-01-20 11:42:43,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 81702 states. [2021-01-20 11:42:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:43,359 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:43,359 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:43,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-01-20 11:42:43,560 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1851155513, now seen corresponding path program 88 times [2021-01-20 11:42:43,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:43,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232035346] [2021-01-20 11:42:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:43,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232035346] [2021-01-20 11:42:43,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459835835] [2021-01-20 11:42:43,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:44,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:42:44,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:45,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:45,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:45,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:45,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:45,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:42:45,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349531204] [2021-01-20 11:42:45,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:42:45,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:42:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:42:45,189 INFO L87 Difference]: Start difference. First operand 81702 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:49,468 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-01-20 11:42:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:50,310 INFO L93 Difference]: Finished difference Result 81970 states and 181291 transitions. [2021-01-20 11:42:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:42:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:50,448 INFO L225 Difference]: With dead ends: 81970 [2021-01-20 11:42:50,448 INFO L226 Difference]: Without dead ends: 81837 [2021-01-20 11:42:50,449 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=744, Invalid=2448, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:42:50,449 INFO L78 Accepts]: Start accepts. Automaton has 81837 states. Word has length 63 [2021-01-20 11:42:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:50,450 INFO L481 AbstractCegarLoop]: Abstraction has 81837 states. [2021-01-20 11:42:50,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 81837 states. [2021-01-20 11:42:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:50,531 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:50,531 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:50,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:50,744 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1095154741, now seen corresponding path program 89 times [2021-01-20 11:42:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:50,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055294240] [2021-01-20 11:42:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055294240] [2021-01-20 11:42:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417905557] [2021-01-20 11:42:51,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:51,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:42:51,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:42:52,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:42:52,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:42:52,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:42:52,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:42:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:52,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:42:52,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-20 11:42:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766179655] [2021-01-20 11:42:52,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-20 11:42:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:42:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-20 11:42:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-01-20 11:42:52,402 INFO L87 Difference]: Start difference. First operand 81837 states. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:52,935 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-01-20 11:42:54,419 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-01-20 11:42:54,945 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-01-20 11:42:55,187 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-01-20 11:42:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:42:59,061 INFO L93 Difference]: Finished difference Result 83111 states and 184040 transitions. [2021-01-20 11:42:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-20 11:42:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:42:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:42:59,151 INFO L225 Difference]: With dead ends: 83111 [2021-01-20 11:42:59,151 INFO L226 Difference]: Without dead ends: 82787 [2021-01-20 11:42:59,151 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-01-20 11:42:59,151 INFO L78 Accepts]: Start accepts. Automaton has 82787 states. Word has length 63 [2021-01-20 11:42:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:42:59,152 INFO L481 AbstractCegarLoop]: Abstraction has 82787 states. [2021-01-20 11:42:59,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:42:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 82787 states. [2021-01-20 11:42:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:42:59,204 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:42:59,204 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:42:59,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:42:59,413 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:42:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:42:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 913087541, now seen corresponding path program 90 times [2021-01-20 11:42:59,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:42:59,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177692217] [2021-01-20 11:42:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:42:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:42:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:42:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177692217] [2021-01-20 11:42:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898947867] [2021-01-20 11:42:59,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:42:59,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:42:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:42:59,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:42:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:00,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:00,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:00,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:00,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:00,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:43:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133319263] [2021-01-20 11:43:00,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:43:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:43:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:43:00,839 INFO L87 Difference]: Start difference. First operand 82787 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:02,042 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2021-01-20 11:43:03,456 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-01-20 11:43:04,126 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-01-20 11:43:05,578 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-01-20 11:43:07,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:07,245 INFO L93 Difference]: Finished difference Result 83420 states and 184654 transitions. [2021-01-20 11:43:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-20 11:43:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:43:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:07,561 INFO L225 Difference]: With dead ends: 83420 [2021-01-20 11:43:07,561 INFO L226 Difference]: Without dead ends: 83097 [2021-01-20 11:43:07,562 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=813, Invalid=2847, Unknown=0, NotChecked=0, Total=3660 [2021-01-20 11:43:07,562 INFO L78 Accepts]: Start accepts. Automaton has 83097 states. Word has length 63 [2021-01-20 11:43:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:07,562 INFO L481 AbstractCegarLoop]: Abstraction has 83097 states. [2021-01-20 11:43:07,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 83097 states. [2021-01-20 11:43:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:43:07,639 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:07,639 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:07,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-01-20 11:43:07,853 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1659798891, now seen corresponding path program 91 times [2021-01-20 11:43:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:07,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922988787] [2021-01-20 11:43:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:08,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922988787] [2021-01-20 11:43:08,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426345246] [2021-01-20 11:43:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:43:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:43:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:09,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:09,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:09,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:09,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:09,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:43:09,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940428153] [2021-01-20 11:43:09,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:43:09,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:43:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:43:09,636 INFO L87 Difference]: Start difference. First operand 83097 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:10,896 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-20 11:43:12,326 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-01-20 11:43:13,007 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-01-20 11:43:15,226 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-01-20 11:43:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:43:17,044 INFO L93 Difference]: Finished difference Result 83870 states and 185574 transitions. [2021-01-20 11:43:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-20 11:43:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:43:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:43:17,310 INFO L225 Difference]: With dead ends: 83870 [2021-01-20 11:43:17,310 INFO L226 Difference]: Without dead ends: 83547 [2021-01-20 11:43:17,311 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:43:17,311 INFO L78 Accepts]: Start accepts. Automaton has 83547 states. Word has length 63 [2021-01-20 11:43:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:43:17,311 INFO L481 AbstractCegarLoop]: Abstraction has 83547 states. [2021-01-20 11:43:17,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 83547 states. [2021-01-20 11:43:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:43:17,379 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:43:17,379 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:43:17,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-20 11:43:17,588 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:43:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:43:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -903798119, now seen corresponding path program 92 times [2021-01-20 11:43:17,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:43:17,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045662685] [2021-01-20 11:43:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:43:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:43:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:18,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045662685] [2021-01-20 11:43:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417078881] [2021-01-20 11:43:18,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:43:18,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:43:18,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:43:18,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:43:18,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:43:18,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:43:23,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:43:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:43:23,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:43:23,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:43:23,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936186680] [2021-01-20 11:43:23,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:43:23,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:43:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:43:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=385, Unknown=2, NotChecked=0, Total=506 [2021-01-20 11:43:23,191 INFO L87 Difference]: Start difference. First operand 83547 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:43:24,338 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2021-01-20 11:43:28,562 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-20 11:43:28,779 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 19 [2021-01-20 11:43:33,776 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-01-20 11:43:35,963 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 34 [2021-01-20 11:43:52,625 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-20 11:43:56,946 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-01-20 11:43:57,214 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 Received shutdown request... [2021-01-20 11:44:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:44:09,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-20 11:44:09,680 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-20 11:44:09,686 WARN L250 ceAbstractionStarter]: Timeout [2021-01-20 11:44:09,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:44:09 BasicIcfg [2021-01-20 11:44:09,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 11:44:09,687 INFO L168 Benchmark]: Toolchain (without parser) took 703677.92 ms. Allocated memory was 302.0 MB in the beginning and 4.8 GB in the end (delta: 4.5 GB). Free memory was 275.7 MB in the beginning and 1.1 GB in the end (delta: -818.4 MB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. [2021-01-20 11:44:09,688 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 302.0 MB. Free memory was 272.1 MB in the beginning and 272.0 MB in the end (delta: 153.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 11:44:09,688 INFO L168 Benchmark]: CACSL2BoogieTranslator took 735.53 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 273.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:09,688 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.90 ms. Allocated memory is still 302.0 MB. Free memory was 273.4 MB in the beginning and 271.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:09,689 INFO L168 Benchmark]: Boogie Preprocessor took 28.40 ms. Allocated memory is still 302.0 MB. Free memory was 271.8 MB in the beginning and 270.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:09,689 INFO L168 Benchmark]: RCFGBuilder took 677.78 ms. Allocated memory is still 302.0 MB. Free memory was 270.2 MB in the beginning and 250.3 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:09,689 INFO L168 Benchmark]: TraceAbstraction took 702163.72 ms. Allocated memory was 302.0 MB in the beginning and 4.8 GB in the end (delta: 4.5 GB). Free memory was 249.7 MB in the beginning and 1.1 GB in the end (delta: -844.5 MB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. [2021-01-20 11:44:09,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 302.0 MB. Free memory was 272.1 MB in the beginning and 272.0 MB in the end (delta: 153.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 735.53 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 273.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 48.90 ms. Allocated memory is still 302.0 MB. Free memory was 273.4 MB in the beginning and 271.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.40 ms. Allocated memory is still 302.0 MB. Free memory was 271.8 MB in the beginning and 270.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 677.78 ms. Allocated memory is still 302.0 MB. Free memory was 270.2 MB in the beginning and 250.3 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 702163.72 ms. Allocated memory was 302.0 MB in the beginning and 4.8 GB in the end (delta: 4.5 GB). Free memory was 249.7 MB in the beginning and 1.1 GB in the end (delta: -844.5 MB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (83547states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (1541 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 701.9s, OverallIterations: 115, TraceHistogramMax: 6, AutomataDifference: 565.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 10333 SDtfs, 95794 SDslu, 124949 SDs, 0 SdLazy, 21104 SolverSat, 7756 SolverUnsat, 121 SolverUnknown, 0 SolverNotchecked, 233.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10057 GetRequests, 5281 SyntacticMatches, 31 SemanticMatches, 4745 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 66142 ImplicationChecksByTransitivity, 369.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83547occurred in iteration=114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 97.3s InterpolantComputationTime, 12347 NumberOfCodeBlocks, 12347 NumberOfCodeBlocksAsserted, 390 NumberOfCheckSat, 12123 ConstructedInterpolants, 17 QuantifiedInterpolants, 5512240 SizeOfPredicates, 453 NumberOfNonLiveVariables, 14842 ConjunctsInSsa, 1386 ConjunctsInUnsatCore, 224 InterpolantComputations, 7 PerfectInterpolantSequences, 103/4388 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