/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/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 15:11:04,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 15:11:04,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 15:11:04,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 15:11:04,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 15:11:04,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 15:11:04,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 15:11:04,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 15:11:04,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 15:11:04,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 15:11:04,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 15:11:04,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 15:11:04,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 15:11:04,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 15:11:04,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 15:11:04,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 15:11:04,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 15:11:04,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 15:11:04,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 15:11:04,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 15:11:04,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 15:11:04,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 15:11:04,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 15:11:04,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 15:11:04,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 15:11:04,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 15:11:04,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 15:11:04,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 15:11:04,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 15:11:04,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 15:11:04,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 15:11:04,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 15:11:04,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 15:11:04,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 15:11:04,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 15:11:04,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 15:11:04,393 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 [2020-11-11 15:11:04,449 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 15:11:04,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 15:11:04,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 15:11:04,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 15:11:04,454 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 15:11:04,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 15:11:04,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 15:11:04,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 15:11:04,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 15:11:04,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 15:11:04,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 15:11:04,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 15:11:04,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 15:11:04,458 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 15:11:04,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 15:11:04,458 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 15:11:04,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 15:11:04,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 15:11:04,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 15:11:04,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 15:11:04,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 15:11:04,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:11:04,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 15:11:04,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 15:11:04,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 15:11:04,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 15:11:04,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 15:11:04,461 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 15:11:04,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 15:11:04,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 15:11:04,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 15:11:04,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 15:11:04,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 15:11:04,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 15:11:04,900 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 15:11:04,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-11 15:11:04,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb81583de/7d8bf86e94ac4b56b964dfb8f00e2781/FLAGfeb322e0a [2020-11-11 15:11:05,691 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 15:11:05,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-11 15:11:05,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb81583de/7d8bf86e94ac4b56b964dfb8f00e2781/FLAGfeb322e0a [2020-11-11 15:11:05,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb81583de/7d8bf86e94ac4b56b964dfb8f00e2781 [2020-11-11 15:11:05,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 15:11:06,000 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 15:11:06,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 15:11:06,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 15:11:06,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 15:11:06,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:06,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577691a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06, skipping insertion in model container [2020-11-11 15:11:06,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:06,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 15:11:06,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 15:11:06,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:11:06,617 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 15:11:06,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:11:06,843 INFO L208 MainTranslator]: Completed translation [2020-11-11 15:11:06,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06 WrapperNode [2020-11-11 15:11:06,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 15:11:06,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 15:11:06,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 15:11:06,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 15:11:06,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 15:11:06,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 15:11:06,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 15:11:06,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 15:11:06,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... [2020-11-11 15:11:06,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 15:11:06,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 15:11:06,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 15:11:06,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 15:11:06,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:11:07,077 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 15:11:07,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 15:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 15:11:07,078 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 15:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 15:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 15:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 15:11:07,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 15:11:07,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 15:11:07,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 15:11:07,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 15:11:07,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 15:11:07,084 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 15:11:07,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 15:11:07,523 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 15:11:07,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:11:07 BoogieIcfgContainer [2020-11-11 15:11:07,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 15:11:07,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 15:11:07,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 15:11:07,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 15:11:07,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:11:05" (1/3) ... [2020-11-11 15:11:07,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@863e2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:11:07, skipping insertion in model container [2020-11-11 15:11:07,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:06" (2/3) ... [2020-11-11 15:11:07,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@863e2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:11:07, skipping insertion in model container [2020-11-11 15:11:07,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:11:07" (3/3) ... [2020-11-11 15:11:07,535 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-11-11 15:11:07,551 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 15:11:07,551 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 15:11:07,555 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 15:11:07,556 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 15:11:07,586 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,586 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,589 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,589 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,599 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,602 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,602 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,603 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:07,628 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 15:11:07,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 15:11:07,675 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 15:11:07,675 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 15:11:07,675 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 15:11:07,675 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 15:11:07,675 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 15:11:07,676 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 15:11:07,676 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 15:11:07,676 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 15:11:07,689 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 15:11:07,841 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 15:11:07,885 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:07,887 INFO L494 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] [2020-11-11 15:11:07,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-11 15:11:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:07,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249213035] [2020-11-11 15:11:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:08,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249213035] [2020-11-11 15:11:08,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:08,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:08,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015199365] [2020-11-11 15:11:08,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:08,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:08,543 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 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) [2020-11-11 15:11:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:08,983 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2020-11-11 15:11:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 15:11:08,989 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 [2020-11-11 15:11:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:09,032 INFO L225 Difference]: With dead ends: 3507 [2020-11-11 15:11:09,041 INFO L226 Difference]: Without dead ends: 1291 [2020-11-11 15:11:09,043 INFO L749 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 [2020-11-11 15:11:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2020-11-11 15:11:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 951. [2020-11-11 15:11:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.7621052631578946) internal successors, (2624), 950 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2624 transitions. [2020-11-11 15:11:09,206 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2624 transitions. Word has length 28 [2020-11-11 15:11:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:09,207 INFO L481 AbstractCegarLoop]: Abstraction has 951 states and 2624 transitions. [2020-11-11 15:11:09,207 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) [2020-11-11 15:11:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2624 transitions. [2020-11-11 15:11:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:09,212 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:09,212 INFO L494 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] [2020-11-11 15:11:09,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 15:11:09,213 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:09,214 INFO L82 PathProgramCache]: Analyzing trace with hash 732293130, now seen corresponding path program 1 times [2020-11-11 15:11:09,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:09,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526117332] [2020-11-11 15:11:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:09,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526117332] [2020-11-11 15:11:09,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:09,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717327442] [2020-11-11 15:11:09,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:09,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:09,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:09,428 INFO L87 Difference]: Start difference. First operand 951 states and 2624 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:09,598 INFO L93 Difference]: Finished difference Result 1131 states and 3040 transitions. [2020-11-11 15:11:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 15:11:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2020-11-11 15:11:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:09,607 INFO L225 Difference]: With dead ends: 1131 [2020-11-11 15:11:09,607 INFO L226 Difference]: Without dead ends: 915 [2020-11-11 15:11:09,608 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-11-11 15:11:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 808. [2020-11-11 15:11:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.7732342007434942) internal successors, (2238), 807 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2238 transitions. [2020-11-11 15:11:09,649 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2238 transitions. Word has length 32 [2020-11-11 15:11:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:09,650 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 2238 transitions. [2020-11-11 15:11:09,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2238 transitions. [2020-11-11 15:11:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:09,653 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:09,653 INFO L494 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] [2020-11-11 15:11:09,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 15:11:09,654 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1417635940, now seen corresponding path program 1 times [2020-11-11 15:11:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:09,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322857304] [2020-11-11 15:11:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:09,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322857304] [2020-11-11 15:11:09,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:09,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:09,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204669346] [2020-11-11 15:11:09,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:09,798 INFO L87 Difference]: Start difference. First operand 808 states and 2238 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:09,976 INFO L93 Difference]: Finished difference Result 2107 states and 5756 transitions. [2020-11-11 15:11:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2020-11-11 15:11:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:09,992 INFO L225 Difference]: With dead ends: 2107 [2020-11-11 15:11:09,993 INFO L226 Difference]: Without dead ends: 1851 [2020-11-11 15:11:09,995 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-11-11 15:11:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 982. [2020-11-11 15:11:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7533129459734966) internal successors, (2701), 981 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2701 transitions. [2020-11-11 15:11:10,051 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2701 transitions. Word has length 32 [2020-11-11 15:11:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:10,052 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2701 transitions. [2020-11-11 15:11:10,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2701 transitions. [2020-11-11 15:11:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:10,054 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:10,054 INFO L494 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] [2020-11-11 15:11:10,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 15:11:10,055 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1368897688, now seen corresponding path program 2 times [2020-11-11 15:11:10,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:10,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242948933] [2020-11-11 15:11:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:10,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242948933] [2020-11-11 15:11:10,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:10,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:10,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197118247] [2020-11-11 15:11:10,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:10,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:10,274 INFO L87 Difference]: Start difference. First operand 982 states and 2701 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:10,409 INFO L93 Difference]: Finished difference Result 1227 states and 3221 transitions. [2020-11-11 15:11:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2020-11-11 15:11:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:10,417 INFO L225 Difference]: With dead ends: 1227 [2020-11-11 15:11:10,417 INFO L226 Difference]: Without dead ends: 902 [2020-11-11 15:11:10,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-11-11 15:11:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 810. [2020-11-11 15:11:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.7169344870210135) internal successors, (2198), 809 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2198 transitions. [2020-11-11 15:11:10,450 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2198 transitions. Word has length 32 [2020-11-11 15:11:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:10,451 INFO L481 AbstractCegarLoop]: Abstraction has 810 states and 2198 transitions. [2020-11-11 15:11:10,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2198 transitions. [2020-11-11 15:11:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:10,453 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:10,453 INFO L494 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] [2020-11-11 15:11:10,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 15:11:10,454 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1044457191, now seen corresponding path program 1 times [2020-11-11 15:11:10,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:10,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265403794] [2020-11-11 15:11:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:10,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265403794] [2020-11-11 15:11:10,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:10,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 15:11:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222977472] [2020-11-11 15:11:10,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:11:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:11:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:11:10,599 INFO L87 Difference]: Start difference. First operand 810 states and 2198 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:10,761 INFO L93 Difference]: Finished difference Result 1698 states and 4550 transitions. [2020-11-11 15:11:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-11-11 15:11:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:10,772 INFO L225 Difference]: With dead ends: 1698 [2020-11-11 15:11:10,772 INFO L226 Difference]: Without dead ends: 1431 [2020-11-11 15:11:10,772 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-11-11 15:11:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 855. [2020-11-11 15:11:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.6814988290398127) internal successors, (2290), 854 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2290 transitions. [2020-11-11 15:11:10,810 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2290 transitions. Word has length 36 [2020-11-11 15:11:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:10,811 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 2290 transitions. [2020-11-11 15:11:10,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2290 transitions. [2020-11-11 15:11:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:10,813 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:10,813 INFO L494 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] [2020-11-11 15:11:10,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 15:11:10,813 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2125654229, now seen corresponding path program 2 times [2020-11-11 15:11:10,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:10,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051536573] [2020-11-11 15:11:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:10,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051536573] [2020-11-11 15:11:10,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:10,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:10,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322443586] [2020-11-11 15:11:10,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:10,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:10,934 INFO L87 Difference]: Start difference. First operand 855 states and 2290 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:11,053 INFO L93 Difference]: Finished difference Result 1293 states and 3358 transitions. [2020-11-11 15:11:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-11-11 15:11:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:11,061 INFO L225 Difference]: With dead ends: 1293 [2020-11-11 15:11:11,061 INFO L226 Difference]: Without dead ends: 1069 [2020-11-11 15:11:11,061 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-11-11 15:11:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 899. [2020-11-11 15:11:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.714922048997773) internal successors, (2438), 898 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2438 transitions. [2020-11-11 15:11:11,097 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2438 transitions. Word has length 36 [2020-11-11 15:11:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:11,097 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 2438 transitions. [2020-11-11 15:11:11,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2438 transitions. [2020-11-11 15:11:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:11,099 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:11,100 INFO L494 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] [2020-11-11 15:11:11,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 15:11:11,100 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1451531371, now seen corresponding path program 3 times [2020-11-11 15:11:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:11,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970632313] [2020-11-11 15:11:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970632313] [2020-11-11 15:11:11,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:11,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511856707] [2020-11-11 15:11:11,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:11,202 INFO L87 Difference]: Start difference. First operand 899 states and 2438 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:11,395 INFO L93 Difference]: Finished difference Result 2449 states and 6632 transitions. [2020-11-11 15:11:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-11-11 15:11:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:11,412 INFO L225 Difference]: With dead ends: 2449 [2020-11-11 15:11:11,412 INFO L226 Difference]: Without dead ends: 2182 [2020-11-11 15:11:11,413 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-11-11 15:11:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1005. [2020-11-11 15:11:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.7739043824701195) internal successors, (2785), 1004 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2785 transitions. [2020-11-11 15:11:11,472 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2785 transitions. Word has length 36 [2020-11-11 15:11:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:11,472 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 2785 transitions. [2020-11-11 15:11:11,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2785 transitions. [2020-11-11 15:11:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:11,474 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:11,475 INFO L494 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] [2020-11-11 15:11:11,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 15:11:11,475 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 259676583, now seen corresponding path program 4 times [2020-11-11 15:11:11,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:11,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461534012] [2020-11-11 15:11:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:11,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461534012] [2020-11-11 15:11:11,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:11,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:11,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142843501] [2020-11-11 15:11:11,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:11,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:11,604 INFO L87 Difference]: Start difference. First operand 1005 states and 2785 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:11,842 INFO L93 Difference]: Finished difference Result 1373 states and 3633 transitions. [2020-11-11 15:11:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-11-11 15:11:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:11,850 INFO L225 Difference]: With dead ends: 1373 [2020-11-11 15:11:11,850 INFO L226 Difference]: Without dead ends: 1037 [2020-11-11 15:11:11,851 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2020-11-11 15:11:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 932. [2020-11-11 15:11:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.740064446831364) internal successors, (2551), 931 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2551 transitions. [2020-11-11 15:11:11,892 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2551 transitions. Word has length 36 [2020-11-11 15:11:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:11,893 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 2551 transitions. [2020-11-11 15:11:11,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2551 transitions. [2020-11-11 15:11:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:11,896 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:11,896 INFO L494 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] [2020-11-11 15:11:11,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-11 15:11:11,896 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1144099044, now seen corresponding path program 1 times [2020-11-11 15:11:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:11,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632098852] [2020-11-11 15:11:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:12,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632098852] [2020-11-11 15:11:12,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193232188] [2020-11-11 15:11:12,028 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 [2020-11-11 15:11:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:12,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:12,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:12,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:11:12,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207983277] [2020-11-11 15:11:12,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:11:12,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:11:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:12,226 INFO L87 Difference]: Start difference. First operand 932 states and 2551 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:12,451 INFO L93 Difference]: Finished difference Result 1330 states and 3475 transitions. [2020-11-11 15:11:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-11-11 15:11:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:12,459 INFO L225 Difference]: With dead ends: 1330 [2020-11-11 15:11:12,459 INFO L226 Difference]: Without dead ends: 1060 [2020-11-11 15:11:12,459 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2020-11-11 15:11:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 977. [2020-11-11 15:11:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.7059426229508197) internal successors, (2641), 976 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2641 transitions. [2020-11-11 15:11:12,495 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2641 transitions. Word has length 41 [2020-11-11 15:11:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:12,496 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 2641 transitions. [2020-11-11 15:11:12,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2641 transitions. [2020-11-11 15:11:12,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:12,498 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:12,498 INFO L494 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] [2020-11-11 15:11:12,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-11 15:11:12,714 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash 988054880, now seen corresponding path program 2 times [2020-11-11 15:11:12,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:12,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077798931] [2020-11-11 15:11:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:12,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077798931] [2020-11-11 15:11:12,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903020509] [2020-11-11 15:11:12,837 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:12,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:12,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:12,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:12,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:13,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:13,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:13,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:13,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244345719] [2020-11-11 15:11:13,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:13,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:13,058 INFO L87 Difference]: Start difference. First operand 977 states and 2641 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:13,295 INFO L93 Difference]: Finished difference Result 1460 states and 3735 transitions. [2020-11-11 15:11:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 15:11:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2020-11-11 15:11:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:13,304 INFO L225 Difference]: With dead ends: 1460 [2020-11-11 15:11:13,304 INFO L226 Difference]: Without dead ends: 1190 [2020-11-11 15:11:13,305 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2020-11-11 15:11:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 982. [2020-11-11 15:11:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7074413863404687) internal successors, (2656), 981 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2656 transitions. [2020-11-11 15:11:13,344 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2656 transitions. Word has length 41 [2020-11-11 15:11:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:13,344 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2656 transitions. [2020-11-11 15:11:13,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2656 transitions. [2020-11-11 15:11:13,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:13,346 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:13,346 INFO L494 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] [2020-11-11 15:11:13,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 15:11:13,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:13,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1616846382, now seen corresponding path program 3 times [2020-11-11 15:11:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:13,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705833399] [2020-11-11 15:11:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:13,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705833399] [2020-11-11 15:11:13,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918372790] [2020-11-11 15:11:13,713 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:13,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 15:11:13,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:13,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:13,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:13,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:11:13,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860306175] [2020-11-11 15:11:13,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:11:13,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:11:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:13,853 INFO L87 Difference]: Start difference. First operand 982 states and 2656 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:14,095 INFO L93 Difference]: Finished difference Result 2552 states and 6879 transitions. [2020-11-11 15:11:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:11:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-11-11 15:11:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:14,111 INFO L225 Difference]: With dead ends: 2552 [2020-11-11 15:11:14,111 INFO L226 Difference]: Without dead ends: 2282 [2020-11-11 15:11:14,112 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-11-11 15:11:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1077. [2020-11-11 15:11:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.757434944237918) internal successors, (2967), 1076 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2967 transitions. [2020-11-11 15:11:14,166 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2967 transitions. Word has length 41 [2020-11-11 15:11:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:14,166 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 2967 transitions. [2020-11-11 15:11:14,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2967 transitions. [2020-11-11 15:11:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:14,169 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:14,169 INFO L494 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] [2020-11-11 15:11:14,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-11 15:11:14,385 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -966912960, now seen corresponding path program 4 times [2020-11-11 15:11:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:14,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349384665] [2020-11-11 15:11:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349384665] [2020-11-11 15:11:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156045368] [2020-11-11 15:11:14,499 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:14,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:14,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:14,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:14,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:14,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:14,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355381623] [2020-11-11 15:11:14,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:14,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:14,633 INFO L87 Difference]: Start difference. First operand 1077 states and 2967 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:15,045 INFO L93 Difference]: Finished difference Result 1892 states and 4965 transitions. [2020-11-11 15:11:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2020-11-11 15:11:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:15,055 INFO L225 Difference]: With dead ends: 1892 [2020-11-11 15:11:15,055 INFO L226 Difference]: Without dead ends: 1365 [2020-11-11 15:11:15,056 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:11:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2020-11-11 15:11:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1087. [2020-11-11 15:11:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.7495395948434624) internal successors, (2986), 1086 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2986 transitions. [2020-11-11 15:11:15,133 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2986 transitions. Word has length 41 [2020-11-11 15:11:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:15,133 INFO L481 AbstractCegarLoop]: Abstraction has 1087 states and 2986 transitions. [2020-11-11 15:11:15,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2986 transitions. [2020-11-11 15:11:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:15,139 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:15,139 INFO L494 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] [2020-11-11 15:11:15,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:15,355 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2116060661, now seen corresponding path program 1 times [2020-11-11 15:11:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:15,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961073877] [2020-11-11 15:11:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:15,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961073877] [2020-11-11 15:11:15,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499657445] [2020-11-11 15:11:15,449 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 [2020-11-11 15:11:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:15,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:15,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:15,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:15,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:15,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721597703] [2020-11-11 15:11:15,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:15,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:15,564 INFO L87 Difference]: Start difference. First operand 1087 states and 2986 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:15,757 INFO L93 Difference]: Finished difference Result 2049 states and 5428 transitions. [2020-11-11 15:11:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2020-11-11 15:11:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:15,766 INFO L225 Difference]: With dead ends: 2049 [2020-11-11 15:11:15,766 INFO L226 Difference]: Without dead ends: 1625 [2020-11-11 15:11:15,766 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:11:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2020-11-11 15:11:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1250. [2020-11-11 15:11:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.7077662129703763) internal successors, (3382), 1249 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3382 transitions. [2020-11-11 15:11:15,806 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3382 transitions. Word has length 41 [2020-11-11 15:11:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:15,806 INFO L481 AbstractCegarLoop]: Abstraction has 1250 states and 3382 transitions. [2020-11-11 15:11:15,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3382 transitions. [2020-11-11 15:11:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:15,809 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:15,810 INFO L494 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] [2020-11-11 15:11:16,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-11 15:11:16,024 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:16,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1069736565, now seen corresponding path program 1 times [2020-11-11 15:11:16,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:16,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992606421] [2020-11-11 15:11:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992606421] [2020-11-11 15:11:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143935557] [2020-11-11 15:11:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:16,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:16,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:16,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:16,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654893263] [2020-11-11 15:11:16,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:16,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:16,357 INFO L87 Difference]: Start difference. First operand 1250 states and 3382 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:16,566 INFO L93 Difference]: Finished difference Result 1680 states and 4370 transitions. [2020-11-11 15:11:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:11:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:16,571 INFO L225 Difference]: With dead ends: 1680 [2020-11-11 15:11:16,571 INFO L226 Difference]: Without dead ends: 1410 [2020-11-11 15:11:16,571 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:11:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2020-11-11 15:11:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1320. [2020-11-11 15:11:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 2.670204700530705) internal successors, (3522), 1319 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3522 transitions. [2020-11-11 15:11:16,612 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3522 transitions. Word has length 51 [2020-11-11 15:11:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:16,612 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states and 3522 transitions. [2020-11-11 15:11:16,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3522 transitions. [2020-11-11 15:11:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:16,615 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:16,615 INFO L494 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] [2020-11-11 15:11:16,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:16,830 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -865747581, now seen corresponding path program 2 times [2020-11-11 15:11:16,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:16,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758165512] [2020-11-11 15:11:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758165512] [2020-11-11 15:11:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756135866] [2020-11-11 15:11:16,951 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:17,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:17,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:17,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:17,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:17,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:17,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-11 15:11:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243399408] [2020-11-11 15:11:17,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:17,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:17,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:17,132 INFO L87 Difference]: Start difference. First operand 1320 states and 3522 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:17,388 INFO L93 Difference]: Finished difference Result 2393 states and 6116 transitions. [2020-11-11 15:11:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:17,393 INFO L225 Difference]: With dead ends: 2393 [2020-11-11 15:11:17,393 INFO L226 Difference]: Without dead ends: 2029 [2020-11-11 15:11:17,394 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:11:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-11-11 15:11:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1327. [2020-11-11 15:11:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6666666666666665) internal successors, (3536), 1326 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3536 transitions. [2020-11-11 15:11:17,444 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3536 transitions. Word has length 51 [2020-11-11 15:11:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:17,444 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3536 transitions. [2020-11-11 15:11:17,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3536 transitions. [2020-11-11 15:11:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:17,447 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:17,448 INFO L494 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] [2020-11-11 15:11:17,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 15:11:17,662 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash -935339201, now seen corresponding path program 3 times [2020-11-11 15:11:17,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:17,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374706144] [2020-11-11 15:11:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:17,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374706144] [2020-11-11 15:11:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439483505] [2020-11-11 15:11:17,824 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:17,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:11:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:17,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:17,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:17,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:17,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266060045] [2020-11-11 15:11:17,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:17,932 INFO L87 Difference]: Start difference. First operand 1327 states and 3536 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:18,159 INFO L93 Difference]: Finished difference Result 1870 states and 4750 transitions. [2020-11-11 15:11:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:18,169 INFO L225 Difference]: With dead ends: 1870 [2020-11-11 15:11:18,169 INFO L226 Difference]: Without dead ends: 1600 [2020-11-11 15:11:18,171 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:11:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2020-11-11 15:11:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1327. [2020-11-11 15:11:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6666666666666665) internal successors, (3536), 1326 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3536 transitions. [2020-11-11 15:11:18,212 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3536 transitions. Word has length 51 [2020-11-11 15:11:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:18,213 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3536 transitions. [2020-11-11 15:11:18,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3536 transitions. [2020-11-11 15:11:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:18,216 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:18,216 INFO L494 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] [2020-11-11 15:11:18,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 15:11:18,430 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash 896193583, now seen corresponding path program 4 times [2020-11-11 15:11:18,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:18,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133127302] [2020-11-11 15:11:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:18,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133127302] [2020-11-11 15:11:18,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820320735] [2020-11-11 15:11:18,535 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:18,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:18,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:18,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:18,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:18,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:18,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-11 15:11:18,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650385948] [2020-11-11 15:11:18,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:18,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:18,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:18,656 INFO L87 Difference]: Start difference. First operand 1327 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:19,100 INFO L93 Difference]: Finished difference Result 2354 states and 6069 transitions. [2020-11-11 15:11:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:19,105 INFO L225 Difference]: With dead ends: 2354 [2020-11-11 15:11:19,106 INFO L226 Difference]: Without dead ends: 1785 [2020-11-11 15:11:19,106 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-11-11 15:11:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1347. [2020-11-11 15:11:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 2.6939078751857357) internal successors, (3626), 1346 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 3626 transitions. [2020-11-11 15:11:19,154 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 3626 transitions. Word has length 51 [2020-11-11 15:11:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:19,154 INFO L481 AbstractCegarLoop]: Abstraction has 1347 states and 3626 transitions. [2020-11-11 15:11:19,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 3626 transitions. [2020-11-11 15:11:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:19,158 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:19,158 INFO L494 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] [2020-11-11 15:11:19,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 15:11:19,373 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1524985085, now seen corresponding path program 5 times [2020-11-11 15:11:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:19,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926103540] [2020-11-11 15:11:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:19,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926103540] [2020-11-11 15:11:19,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294008357] [2020-11-11 15:11:19,484 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:19,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 15:11:19,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:19,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:19,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:19,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:19,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933794169] [2020-11-11 15:11:19,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:19,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:19,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:19,604 INFO L87 Difference]: Start difference. First operand 1347 states and 3626 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:19,857 INFO L93 Difference]: Finished difference Result 3062 states and 8159 transitions. [2020-11-11 15:11:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:19,865 INFO L225 Difference]: With dead ends: 3062 [2020-11-11 15:11:19,865 INFO L226 Difference]: Without dead ends: 2792 [2020-11-11 15:11:19,866 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2020-11-11 15:11:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1472. [2020-11-11 15:11:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.7307953772943576) internal successors, (4017), 1471 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4017 transitions. [2020-11-11 15:11:19,917 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4017 transitions. Word has length 51 [2020-11-11 15:11:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:19,917 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states and 4017 transitions. [2020-11-11 15:11:19,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4017 transitions. [2020-11-11 15:11:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:19,923 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:19,923 INFO L494 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] [2020-11-11 15:11:20,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 15:11:20,139 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1058774257, now seen corresponding path program 6 times [2020-11-11 15:11:20,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:20,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801398781] [2020-11-11 15:11:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:20,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801398781] [2020-11-11 15:11:20,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229261758] [2020-11-11 15:11:20,242 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:20,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 15:11:20,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:20,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:20,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:20,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:20,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638410860] [2020-11-11 15:11:20,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:20,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:20,342 INFO L87 Difference]: Start difference. First operand 1472 states and 4017 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:20,743 INFO L93 Difference]: Finished difference Result 2061 states and 5435 transitions. [2020-11-11 15:11:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:20,747 INFO L225 Difference]: With dead ends: 2061 [2020-11-11 15:11:20,748 INFO L226 Difference]: Without dead ends: 1650 [2020-11-11 15:11:20,748 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2020-11-11 15:11:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1422. [2020-11-11 15:11:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 2.7241379310344827) internal successors, (3871), 1421 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 3871 transitions. [2020-11-11 15:11:20,797 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 3871 transitions. Word has length 51 [2020-11-11 15:11:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:20,798 INFO L481 AbstractCegarLoop]: Abstraction has 1422 states and 3871 transitions. [2020-11-11 15:11:20,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 3871 transitions. [2020-11-11 15:11:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:20,805 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:20,805 INFO L494 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] [2020-11-11 15:11:21,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:21,020 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash -955199723, now seen corresponding path program 7 times [2020-11-11 15:11:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:21,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780778773] [2020-11-11 15:11:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780778773] [2020-11-11 15:11:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927413322] [2020-11-11 15:11:21,128 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:21,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:21,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:21,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:21,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169319097] [2020-11-11 15:11:21,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:21,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:21,222 INFO L87 Difference]: Start difference. First operand 1422 states and 3871 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:21,372 INFO L93 Difference]: Finished difference Result 2075 states and 5305 transitions. [2020-11-11 15:11:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:11:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:21,377 INFO L225 Difference]: With dead ends: 2075 [2020-11-11 15:11:21,377 INFO L226 Difference]: Without dead ends: 1790 [2020-11-11 15:11:21,377 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-11-11 15:11:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1402. [2020-11-11 15:11:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.7344753747323343) internal successors, (3831), 1401 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 3831 transitions. [2020-11-11 15:11:21,415 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 3831 transitions. Word has length 51 [2020-11-11 15:11:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:21,415 INFO L481 AbstractCegarLoop]: Abstraction has 1402 states and 3831 transitions. [2020-11-11 15:11:21,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 3831 transitions. [2020-11-11 15:11:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:21,418 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:21,418 INFO L494 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] [2020-11-11 15:11:21,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:21,632 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -812913627, now seen corresponding path program 8 times [2020-11-11 15:11:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:21,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153921463] [2020-11-11 15:11:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:21,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153921463] [2020-11-11 15:11:21,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251174879] [2020-11-11 15:11:21,735 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:21,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:21,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:21,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:21,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:21,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:21,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:21,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 15:11:21,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738244692] [2020-11-11 15:11:21,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:21,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:21,876 INFO L87 Difference]: Start difference. First operand 1402 states and 3831 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:22,132 INFO L93 Difference]: Finished difference Result 2010 states and 5175 transitions. [2020-11-11 15:11:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:22,139 INFO L225 Difference]: With dead ends: 2010 [2020-11-11 15:11:22,139 INFO L226 Difference]: Without dead ends: 1725 [2020-11-11 15:11:22,142 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:11:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-11-11 15:11:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1377. [2020-11-11 15:11:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.7478197674418605) internal successors, (3781), 1376 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3781 transitions. [2020-11-11 15:11:22,181 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3781 transitions. Word has length 51 [2020-11-11 15:11:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:22,181 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3781 transitions. [2020-11-11 15:11:22,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3781 transitions. [2020-11-11 15:11:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:22,186 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:22,186 INFO L494 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] [2020-11-11 15:11:22,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-11 15:11:22,400 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:22,400 INFO L82 PathProgramCache]: Analyzing trace with hash -965303273, now seen corresponding path program 9 times [2020-11-11 15:11:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:22,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730726839] [2020-11-11 15:11:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:22,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730726839] [2020-11-11 15:11:22,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734748262] [2020-11-11 15:11:22,511 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:22,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:11:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:22,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:22,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:22,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:22,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:22,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999242920] [2020-11-11 15:11:22,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:22,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:22,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:22,606 INFO L87 Difference]: Start difference. First operand 1377 states and 3781 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:22,890 INFO L93 Difference]: Finished difference Result 3142 states and 8419 transitions. [2020-11-11 15:11:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:22,900 INFO L225 Difference]: With dead ends: 3142 [2020-11-11 15:11:22,900 INFO L226 Difference]: Without dead ends: 2842 [2020-11-11 15:11:22,901 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:11:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2020-11-11 15:11:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1487. [2020-11-11 15:11:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.780619111709287) internal successors, (4132), 1486 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4132 transitions. [2020-11-11 15:11:22,962 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4132 transitions. Word has length 51 [2020-11-11 15:11:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:22,962 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4132 transitions. [2020-11-11 15:11:22,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4132 transitions. [2020-11-11 15:11:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:22,967 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:22,967 INFO L494 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] [2020-11-11 15:11:23,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:23,181 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash 434994502, now seen corresponding path program 10 times [2020-11-11 15:11:23,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:23,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509383655] [2020-11-11 15:11:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:23,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509383655] [2020-11-11 15:11:23,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284568500] [2020-11-11 15:11:23,289 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:23,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:23,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:23,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:23,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:23,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:23,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:23,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237746780] [2020-11-11 15:11:23,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:23,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:23,391 INFO L87 Difference]: Start difference. First operand 1487 states and 4132 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:23,636 INFO L93 Difference]: Finished difference Result 2076 states and 5550 transitions. [2020-11-11 15:11:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-11-11 15:11:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:23,643 INFO L225 Difference]: With dead ends: 2076 [2020-11-11 15:11:23,644 INFO L226 Difference]: Without dead ends: 1605 [2020-11-11 15:11:23,644 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:11:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2020-11-11 15:11:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1091. [2020-11-11 15:11:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 2.7229357798165137) internal successors, (2968), 1090 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 2968 transitions. [2020-11-11 15:11:23,671 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 2968 transitions. Word has length 51 [2020-11-11 15:11:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:23,671 INFO L481 AbstractCegarLoop]: Abstraction has 1091 states and 2968 transitions. [2020-11-11 15:11:23,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 2968 transitions. [2020-11-11 15:11:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:23,674 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:23,674 INFO L494 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] [2020-11-11 15:11:23,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 15:11:23,888 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1906333367, now seen corresponding path program 11 times [2020-11-11 15:11:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:23,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494177724] [2020-11-11 15:11:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:24,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494177724] [2020-11-11 15:11:24,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750412702] [2020-11-11 15:11:24,045 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:24,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:24,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:24,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:24,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:24,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:24,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:24,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002406774] [2020-11-11 15:11:24,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:24,216 INFO L87 Difference]: Start difference. First operand 1091 states and 2968 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:24,538 INFO L93 Difference]: Finished difference Result 2009 states and 5252 transitions. [2020-11-11 15:11:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 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 56 [2020-11-11 15:11:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:24,542 INFO L225 Difference]: With dead ends: 2009 [2020-11-11 15:11:24,542 INFO L226 Difference]: Without dead ends: 1675 [2020-11-11 15:11:24,543 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2020-11-11 15:11:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1176. [2020-11-11 15:11:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.6706382978723404) internal successors, (3138), 1175 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3138 transitions. [2020-11-11 15:11:24,575 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3138 transitions. Word has length 56 [2020-11-11 15:11:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:24,576 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 3138 transitions. [2020-11-11 15:11:24,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3138 transitions. [2020-11-11 15:11:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:24,579 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:24,579 INFO L494 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] [2020-11-11 15:11:24,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:24,794 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:24,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2112175369, now seen corresponding path program 12 times [2020-11-11 15:11:24,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:24,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696294596] [2020-11-11 15:11:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:24,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696294596] [2020-11-11 15:11:24,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231241406] [2020-11-11 15:11:24,979 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:25,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:11:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:25,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:25,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:25,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392331215] [2020-11-11 15:11:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:25,068 INFO L87 Difference]: Start difference. First operand 1176 states and 3138 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:25,243 INFO L93 Difference]: Finished difference Result 2060 states and 5120 transitions. [2020-11-11 15:11:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:11:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2020-11-11 15:11:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:25,247 INFO L225 Difference]: With dead ends: 2060 [2020-11-11 15:11:25,247 INFO L226 Difference]: Without dead ends: 1790 [2020-11-11 15:11:25,247 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:11:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-11-11 15:11:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1277. [2020-11-11 15:11:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 2.6849529780564265) internal successors, (3426), 1276 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 3426 transitions. [2020-11-11 15:11:25,276 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 3426 transitions. Word has length 56 [2020-11-11 15:11:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:25,277 INFO L481 AbstractCegarLoop]: Abstraction has 1277 states and 3426 transitions. [2020-11-11 15:11:25,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 3426 transitions. [2020-11-11 15:11:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:25,280 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:25,280 INFO L494 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] [2020-11-11 15:11:25,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 15:11:25,497 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash 643256295, now seen corresponding path program 13 times [2020-11-11 15:11:25,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:25,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206932458] [2020-11-11 15:11:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:25,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206932458] [2020-11-11 15:11:25,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058278515] [2020-11-11 15:11:25,620 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:25,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:25,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:25,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:25,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:11:25,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690543939] [2020-11-11 15:11:25,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:25,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:25,724 INFO L87 Difference]: Start difference. First operand 1277 states and 3426 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-11-11 15:11:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:26,002 INFO L93 Difference]: Finished difference Result 1995 states and 5040 transitions. [2020-11-11 15:11:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 56 [2020-11-11 15:11:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:26,007 INFO L225 Difference]: With dead ends: 1995 [2020-11-11 15:11:26,007 INFO L226 Difference]: Without dead ends: 1725 [2020-11-11 15:11:26,008 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-11-11 15:11:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1327. [2020-11-11 15:11:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6968325791855206) internal successors, (3576), 1326 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3576 transitions. [2020-11-11 15:11:26,045 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3576 transitions. Word has length 56 [2020-11-11 15:11:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:26,045 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3576 transitions. [2020-11-11 15:11:26,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-11-11 15:11:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3576 transitions. [2020-11-11 15:11:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:26,049 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:26,049 INFO L494 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] [2020-11-11 15:11:26,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 15:11:26,264 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash -713310411, now seen corresponding path program 14 times [2020-11-11 15:11:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:26,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482953164] [2020-11-11 15:11:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:26,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482953164] [2020-11-11 15:11:26,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812550343] [2020-11-11 15:11:26,410 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:26,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:26,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:26,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:26,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:26,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:26,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914480593] [2020-11-11 15:11:26,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:26,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:26,509 INFO L87 Difference]: Start difference. First operand 1327 states and 3576 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:26,792 INFO L93 Difference]: Finished difference Result 2020 states and 5140 transitions. [2020-11-11 15:11:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:11:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2020-11-11 15:11:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:26,796 INFO L225 Difference]: With dead ends: 2020 [2020-11-11 15:11:26,796 INFO L226 Difference]: Without dead ends: 1750 [2020-11-11 15:11:26,797 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:11:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2020-11-11 15:11:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1377. [2020-11-11 15:11:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.707848837209302) internal successors, (3726), 1376 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3726 transitions. [2020-11-11 15:11:26,843 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3726 transitions. Word has length 56 [2020-11-11 15:11:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:26,843 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3726 transitions. [2020-11-11 15:11:26,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3726 transitions. [2020-11-11 15:11:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:26,847 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:26,847 INFO L494 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] [2020-11-11 15:11:27,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 15:11:27,063 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1118222373, now seen corresponding path program 15 times [2020-11-11 15:11:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:27,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36772905] [2020-11-11 15:11:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:27,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36772905] [2020-11-11 15:11:27,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832319831] [2020-11-11 15:11:27,200 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:27,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:11:27,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:27,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:27,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:27,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:11:27,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108618312] [2020-11-11 15:11:27,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:27,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:27,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:27,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:27,311 INFO L87 Difference]: Start difference. First operand 1377 states and 3726 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-11-11 15:11:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:27,639 INFO L93 Difference]: Finished difference Result 2065 states and 5310 transitions. [2020-11-11 15:11:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 56 [2020-11-11 15:11:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:27,643 INFO L225 Difference]: With dead ends: 2065 [2020-11-11 15:11:27,643 INFO L226 Difference]: Without dead ends: 1795 [2020-11-11 15:11:27,643 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2020-11-11 15:11:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1427. [2020-11-11 15:11:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 2.728611500701262) internal successors, (3891), 1426 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 3891 transitions. [2020-11-11 15:11:27,675 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 3891 transitions. Word has length 56 [2020-11-11 15:11:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:27,676 INFO L481 AbstractCegarLoop]: Abstraction has 1427 states and 3891 transitions. [2020-11-11 15:11:27,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-11-11 15:11:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 3891 transitions. [2020-11-11 15:11:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:27,678 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:27,679 INFO L494 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] [2020-11-11 15:11:27,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 15:11:27,893 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1747013875, now seen corresponding path program 16 times [2020-11-11 15:11:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:27,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173062590] [2020-11-11 15:11:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:27,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173062590] [2020-11-11 15:11:27,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111776689] [2020-11-11 15:11:27,994 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:28,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:28,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:28,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:28,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:28,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364072598] [2020-11-11 15:11:28,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:28,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:28,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:28,077 INFO L87 Difference]: Start difference. First operand 1427 states and 3891 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:28,356 INFO L93 Difference]: Finished difference Result 3152 states and 8444 transitions. [2020-11-11 15:11:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:28,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2020-11-11 15:11:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:28,363 INFO L225 Difference]: With dead ends: 3152 [2020-11-11 15:11:28,363 INFO L226 Difference]: Without dead ends: 2882 [2020-11-11 15:11:28,365 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2020-11-11 15:11:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1552. [2020-11-11 15:11:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7607994842037393) internal successors, (4282), 1551 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4282 transitions. [2020-11-11 15:11:28,408 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4282 transitions. Word has length 56 [2020-11-11 15:11:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:28,408 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4282 transitions. [2020-11-11 15:11:28,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4282 transitions. [2020-11-11 15:11:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:28,411 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:28,411 INFO L494 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] [2020-11-11 15:11:28,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 15:11:28,627 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:28,628 INFO L82 PathProgramCache]: Analyzing trace with hash -836745467, now seen corresponding path program 17 times [2020-11-11 15:11:28,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:28,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430174348] [2020-11-11 15:11:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:28,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430174348] [2020-11-11 15:11:28,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607405233] [2020-11-11 15:11:28,735 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:28,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:28,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:28,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:28,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:28,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:28,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:11:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143089619] [2020-11-11 15:11:28,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:28,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:28,865 INFO L87 Difference]: Start difference. First operand 1552 states and 4282 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:29,387 INFO L93 Difference]: Finished difference Result 2607 states and 6840 transitions. [2020-11-11 15:11:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 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 56 [2020-11-11 15:11:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:29,390 INFO L225 Difference]: With dead ends: 2607 [2020-11-11 15:11:29,391 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:11:29,391 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:11:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1562. [2020-11-11 15:11:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:29,425 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 56 [2020-11-11 15:11:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:29,425 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:29,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:29,428 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:29,428 INFO L494 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] [2020-11-11 15:11:29,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:29,643 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:29,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1823983856, now seen corresponding path program 18 times [2020-11-11 15:11:29,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:29,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968938967] [2020-11-11 15:11:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:29,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968938967] [2020-11-11 15:11:29,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801393477] [2020-11-11 15:11:29,765 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:29,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:11:29,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:29,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:29,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:29,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:11:29,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616882011] [2020-11-11 15:11:29,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:29,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:29,882 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:30,117 INFO L93 Difference]: Finished difference Result 2205 states and 5700 transitions. [2020-11-11 15:11:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-11-11 15:11:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:30,122 INFO L225 Difference]: With dead ends: 2205 [2020-11-11 15:11:30,122 INFO L226 Difference]: Without dead ends: 1935 [2020-11-11 15:11:30,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-11-11 15:11:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1562. [2020-11-11 15:11:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:30,157 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:11:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:30,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:30,160 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:30,161 INFO L494 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] [2020-11-11 15:11:30,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-11 15:11:30,377 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash 931447808, now seen corresponding path program 19 times [2020-11-11 15:11:30,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:30,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565679098] [2020-11-11 15:11:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:30,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565679098] [2020-11-11 15:11:30,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457866801] [2020-11-11 15:11:30,519 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:30,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:30,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:30,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:30,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:30,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:30,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536669618] [2020-11-11 15:11:30,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:30,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:30,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:30,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:30,626 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:30,985 INFO L93 Difference]: Finished difference Result 2300 states and 5890 transitions. [2020-11-11 15:11:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-11-11 15:11:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:30,990 INFO L225 Difference]: With dead ends: 2300 [2020-11-11 15:11:30,990 INFO L226 Difference]: Without dead ends: 2030 [2020-11-11 15:11:30,991 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:11:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2020-11-11 15:11:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1562. [2020-11-11 15:11:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:31,027 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:11:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:31,027 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:31,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:31,030 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:31,030 INFO L494 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] [2020-11-11 15:11:31,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:31,245 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:31,246 INFO L82 PathProgramCache]: Analyzing trace with hash -425118898, now seen corresponding path program 20 times [2020-11-11 15:11:31,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:31,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202428854] [2020-11-11 15:11:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:31,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202428854] [2020-11-11 15:11:31,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785238260] [2020-11-11 15:11:31,393 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:31,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:31,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:31,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:31,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:31,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:11:31,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753066621] [2020-11-11 15:11:31,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:31,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:31,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:31,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:31,480 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:31,785 INFO L93 Difference]: Finished difference Result 2255 states and 5800 transitions. [2020-11-11 15:11:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-11-11 15:11:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:31,788 INFO L225 Difference]: With dead ends: 2255 [2020-11-11 15:11:31,788 INFO L226 Difference]: Without dead ends: 1985 [2020-11-11 15:11:31,789 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:11:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-11-11 15:11:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1562. [2020-11-11 15:11:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:31,822 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:11:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:31,822 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:31,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:31,825 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:31,825 INFO L494 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] [2020-11-11 15:11:32,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-11 15:11:32,040 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1406413886, now seen corresponding path program 21 times [2020-11-11 15:11:32,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:32,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745215322] [2020-11-11 15:11:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:32,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745215322] [2020-11-11 15:11:32,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555041719] [2020-11-11 15:11:32,158 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:32,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:11:32,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:32,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:32,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:32,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:32,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201702316] [2020-11-11 15:11:32,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:32,263 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:32,639 INFO L93 Difference]: Finished difference Result 2250 states and 5810 transitions. [2020-11-11 15:11:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-11-11 15:11:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:32,643 INFO L225 Difference]: With dead ends: 2250 [2020-11-11 15:11:32,644 INFO L226 Difference]: Without dead ends: 1980 [2020-11-11 15:11:32,644 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2020-11-11 15:11:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1562. [2020-11-11 15:11:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7488789237668163) internal successors, (4291), 1561 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4291 transitions. [2020-11-11 15:11:32,679 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4291 transitions. Word has length 61 [2020-11-11 15:11:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:32,680 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4291 transitions. [2020-11-11 15:11:32,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4291 transitions. [2020-11-11 15:11:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:32,683 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:32,683 INFO L494 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] [2020-11-11 15:11:32,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 15:11:32,896 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2035205388, now seen corresponding path program 22 times [2020-11-11 15:11:32,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:32,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502336113] [2020-11-11 15:11:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:33,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502336113] [2020-11-11 15:11:33,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036381368] [2020-11-11 15:11:33,006 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:33,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:33,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:33,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:33,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:33,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:11:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523423397] [2020-11-11 15:11:33,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:33,096 INFO L87 Difference]: Start difference. First operand 1562 states and 4291 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:33,474 INFO L93 Difference]: Finished difference Result 3312 states and 8894 transitions. [2020-11-11 15:11:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-11-11 15:11:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:33,478 INFO L225 Difference]: With dead ends: 3312 [2020-11-11 15:11:33,478 INFO L226 Difference]: Without dead ends: 3042 [2020-11-11 15:11:33,479 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-11-11 15:11:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1687. [2020-11-11 15:11:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.7769869513641754) internal successors, (4682), 1686 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4682 transitions. [2020-11-11 15:11:33,523 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4682 transitions. Word has length 61 [2020-11-11 15:11:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:33,523 INFO L481 AbstractCegarLoop]: Abstraction has 1687 states and 4682 transitions. [2020-11-11 15:11:33,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4682 transitions. [2020-11-11 15:11:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:33,526 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:33,526 INFO L494 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] [2020-11-11 15:11:33,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-11 15:11:33,740 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:33,741 INFO L82 PathProgramCache]: Analyzing trace with hash -548553954, now seen corresponding path program 23 times [2020-11-11 15:11:33,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:33,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454755755] [2020-11-11 15:11:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:33,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454755755] [2020-11-11 15:11:33,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646105212] [2020-11-11 15:11:33,873 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:33,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:33,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:33,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:33,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:33,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:33,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:33,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:33,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071915079] [2020-11-11 15:11:33,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:33,996 INFO L87 Difference]: Start difference. First operand 1687 states and 4682 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2020-11-11 15:11:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:34,524 INFO L93 Difference]: Finished difference Result 2707 states and 7140 transitions. [2020-11-11 15:11:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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 61 [2020-11-11 15:11:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:34,527 INFO L225 Difference]: With dead ends: 2707 [2020-11-11 15:11:34,527 INFO L226 Difference]: Without dead ends: 2180 [2020-11-11 15:11:34,528 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2020-11-11 15:11:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1301. [2020-11-11 15:11:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 2.706153846153846) internal successors, (3518), 1300 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 3518 transitions. [2020-11-11 15:11:34,555 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 3518 transitions. Word has length 61 [2020-11-11 15:11:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:34,555 INFO L481 AbstractCegarLoop]: Abstraction has 1301 states and 3518 transitions. [2020-11-11 15:11:34,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2020-11-11 15:11:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 3518 transitions. [2020-11-11 15:11:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:34,557 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:34,558 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:34,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 15:11:34,772 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1466794138, now seen corresponding path program 24 times [2020-11-11 15:11:34,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:34,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063674595] [2020-11-11 15:11:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:34,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063674595] [2020-11-11 15:11:34,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972366376] [2020-11-11 15:11:34,935 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:34,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:34,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:34,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:34,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:35,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:35,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:35,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:35,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-11 15:11:35,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515695032] [2020-11-11 15:11:35,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:35,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:35,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:35,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:35,063 INFO L87 Difference]: Start difference. First operand 1301 states and 3518 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:35,414 INFO L93 Difference]: Finished difference Result 2269 states and 5902 transitions. [2020-11-11 15:11:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:35,418 INFO L225 Difference]: With dead ends: 2269 [2020-11-11 15:11:35,418 INFO L226 Difference]: Without dead ends: 1935 [2020-11-11 15:11:35,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-11-11 15:11:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1386. [2020-11-11 15:11:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.6628158844765344) internal successors, (3688), 1385 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 3688 transitions. [2020-11-11 15:11:35,477 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 3688 transitions. Word has length 66 [2020-11-11 15:11:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:35,478 INFO L481 AbstractCegarLoop]: Abstraction has 1386 states and 3688 transitions. [2020-11-11 15:11:35,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 3688 transitions. [2020-11-11 15:11:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:35,481 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:35,481 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:35,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 15:11:35,694 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:35,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1504782136, now seen corresponding path program 25 times [2020-11-11 15:11:35,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:35,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352678195] [2020-11-11 15:11:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:35,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352678195] [2020-11-11 15:11:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651564384] [2020-11-11 15:11:35,858 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:35,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:35,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:36,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:36,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:36,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597538653] [2020-11-11 15:11:36,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:36,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:36,004 INFO L87 Difference]: Start difference. First operand 1386 states and 3688 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:36,259 INFO L93 Difference]: Finished difference Result 2420 states and 5970 transitions. [2020-11-11 15:11:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:36,263 INFO L225 Difference]: With dead ends: 2420 [2020-11-11 15:11:36,263 INFO L226 Difference]: Without dead ends: 2150 [2020-11-11 15:11:36,263 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2020-11-11 15:11:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1487. [2020-11-11 15:11:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.6756393001345895) internal successors, (3976), 1486 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3976 transitions. [2020-11-11 15:11:36,288 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3976 transitions. Word has length 66 [2020-11-11 15:11:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:36,288 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 3976 transitions. [2020-11-11 15:11:36,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3976 transitions. [2020-11-11 15:11:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:36,291 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:36,291 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:36,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:36,507 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -676070984, now seen corresponding path program 26 times [2020-11-11 15:11:36,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:36,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492596584] [2020-11-11 15:11:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:36,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492596584] [2020-11-11 15:11:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970170424] [2020-11-11 15:11:36,651 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:36,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:36,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:36,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:36,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:36,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898191131] [2020-11-11 15:11:36,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:36,805 INFO L87 Difference]: Start difference. First operand 1487 states and 3976 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:37,105 INFO L93 Difference]: Finished difference Result 2355 states and 5890 transitions. [2020-11-11 15:11:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:37,110 INFO L225 Difference]: With dead ends: 2355 [2020-11-11 15:11:37,110 INFO L226 Difference]: Without dead ends: 2085 [2020-11-11 15:11:37,111 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-11-11 15:11:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1537. [2020-11-11 15:11:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 2.6861979166666665) internal successors, (4126), 1536 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4126 transitions. [2020-11-11 15:11:37,136 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4126 transitions. Word has length 66 [2020-11-11 15:11:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:37,137 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 4126 transitions. [2020-11-11 15:11:37,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4126 transitions. [2020-11-11 15:11:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:37,140 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:37,140 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:37,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 15:11:37,355 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:37,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1896357766, now seen corresponding path program 27 times [2020-11-11 15:11:37,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:37,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109974177] [2020-11-11 15:11:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:37,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109974177] [2020-11-11 15:11:37,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849252794] [2020-11-11 15:11:37,490 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:37,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:37,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:37,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:37,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:37,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568088213] [2020-11-11 15:11:37,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:37,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:37,603 INFO L87 Difference]: Start difference. First operand 1537 states and 4126 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:37,879 INFO L93 Difference]: Finished difference Result 2380 states and 5990 transitions. [2020-11-11 15:11:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:37,883 INFO L225 Difference]: With dead ends: 2380 [2020-11-11 15:11:37,883 INFO L226 Difference]: Without dead ends: 2110 [2020-11-11 15:11:37,884 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:11:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2020-11-11 15:11:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1587. [2020-11-11 15:11:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.6960907944514503) internal successors, (4276), 1586 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4276 transitions. [2020-11-11 15:11:37,953 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4276 transitions. Word has length 66 [2020-11-11 15:11:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:37,953 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 4276 transitions. [2020-11-11 15:11:37,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4276 transitions. [2020-11-11 15:11:37,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:37,957 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:37,958 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:38,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 15:11:38,164 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash 356822134, now seen corresponding path program 28 times [2020-11-11 15:11:38,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:38,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429862362] [2020-11-11 15:11:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429862362] [2020-11-11 15:11:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411466417] [2020-11-11 15:11:38,320 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:38,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:38,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:38,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:38,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:38,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:38,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821168730] [2020-11-11 15:11:38,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:38,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:38,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:38,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:38,451 INFO L87 Difference]: Start difference. First operand 1587 states and 4276 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:38,864 INFO L93 Difference]: Finished difference Result 2380 states and 6040 transitions. [2020-11-11 15:11:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:38,868 INFO L225 Difference]: With dead ends: 2380 [2020-11-11 15:11:38,868 INFO L226 Difference]: Without dead ends: 2110 [2020-11-11 15:11:38,868 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2020-11-11 15:11:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1637. [2020-11-11 15:11:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.7053789731051343) internal successors, (4426), 1636 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 4426 transitions. [2020-11-11 15:11:38,891 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 4426 transitions. Word has length 66 [2020-11-11 15:11:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:38,891 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 4426 transitions. [2020-11-11 15:11:38,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 4426 transitions. [2020-11-11 15:11:38,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:38,894 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:38,894 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:39,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:39,109 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash -999744572, now seen corresponding path program 29 times [2020-11-11 15:11:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:39,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520476062] [2020-11-11 15:11:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:39,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520476062] [2020-11-11 15:11:39,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658057645] [2020-11-11 15:11:39,237 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:39,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:39,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:39,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:39,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:39,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646171684] [2020-11-11 15:11:39,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:39,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:39,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:39,334 INFO L87 Difference]: Start difference. First operand 1637 states and 4426 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:39,685 INFO L93 Difference]: Finished difference Result 2410 states and 6165 transitions. [2020-11-11 15:11:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:39,689 INFO L225 Difference]: With dead ends: 2410 [2020-11-11 15:11:39,689 INFO L226 Difference]: Without dead ends: 2140 [2020-11-11 15:11:39,690 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2020-11-11 15:11:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1687. [2020-11-11 15:11:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.720047449584816) internal successors, (4586), 1686 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4586 transitions. [2020-11-11 15:11:39,725 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4586 transitions. Word has length 66 [2020-11-11 15:11:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:39,726 INFO L481 AbstractCegarLoop]: Abstraction has 1687 states and 4586 transitions. [2020-11-11 15:11:39,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4586 transitions. [2020-11-11 15:11:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:39,729 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:39,729 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:39,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 15:11:39,944 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash 831788212, now seen corresponding path program 30 times [2020-11-11 15:11:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:39,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733650918] [2020-11-11 15:11:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:40,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733650918] [2020-11-11 15:11:40,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177795369] [2020-11-11 15:11:40,074 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:40,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:40,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:40,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:40,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:40,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:40,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:40,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340446907] [2020-11-11 15:11:40,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:40,199 INFO L87 Difference]: Start difference. First operand 1687 states and 4586 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:40,777 INFO L93 Difference]: Finished difference Result 2869 states and 7434 transitions. [2020-11-11 15:11:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:40,781 INFO L225 Difference]: With dead ends: 2869 [2020-11-11 15:11:40,781 INFO L226 Difference]: Without dead ends: 2300 [2020-11-11 15:11:40,782 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2020-11-11 15:11:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1737. [2020-11-11 15:11:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.7309907834101383) internal successors, (4741), 1736 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4741 transitions. [2020-11-11 15:11:40,809 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4741 transitions. Word has length 66 [2020-11-11 15:11:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:40,810 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4741 transitions. [2020-11-11 15:11:40,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4741 transitions. [2020-11-11 15:11:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:40,813 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:40,813 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:41,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:41,022 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1460579714, now seen corresponding path program 31 times [2020-11-11 15:11:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:41,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682500459] [2020-11-11 15:11:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:41,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682500459] [2020-11-11 15:11:41,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799784389] [2020-11-11 15:11:41,135 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:41,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:41,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:41,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088023907] [2020-11-11 15:11:41,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:41,245 INFO L87 Difference]: Start difference. First operand 1737 states and 4741 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:41,618 INFO L93 Difference]: Finished difference Result 3512 states and 9394 transitions. [2020-11-11 15:11:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:41,627 INFO L225 Difference]: With dead ends: 3512 [2020-11-11 15:11:41,627 INFO L226 Difference]: Without dead ends: 3242 [2020-11-11 15:11:41,628 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2020-11-11 15:11:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 1862. [2020-11-11 15:11:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 2.7576571735626008) internal successors, (5132), 1861 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5132 transitions. [2020-11-11 15:11:41,672 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5132 transitions. Word has length 66 [2020-11-11 15:11:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:41,673 INFO L481 AbstractCegarLoop]: Abstraction has 1862 states and 5132 transitions. [2020-11-11 15:11:41,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5132 transitions. [2020-11-11 15:11:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:41,676 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:41,676 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-11-11 15:11:41,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 15:11:41,891 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1123179628, now seen corresponding path program 32 times [2020-11-11 15:11:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:41,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439315739] [2020-11-11 15:11:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439315739] [2020-11-11 15:11:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468001574] [2020-11-11 15:11:42,003 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:42,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:42,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:42,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:42,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:42,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:42,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115833314] [2020-11-11 15:11:42,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:42,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:42,124 INFO L87 Difference]: Start difference. First operand 1862 states and 5132 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:42,613 INFO L93 Difference]: Finished difference Result 2551 states and 6750 transitions. [2020-11-11 15:11:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-11-11 15:11:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:42,617 INFO L225 Difference]: With dead ends: 2551 [2020-11-11 15:11:42,617 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:11:42,617 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:11:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1452. [2020-11-11 15:11:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.7057201929703654) internal successors, (3926), 1451 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3926 transitions. [2020-11-11 15:11:42,650 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3926 transitions. Word has length 66 [2020-11-11 15:11:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:42,650 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 3926 transitions. [2020-11-11 15:11:42,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3926 transitions. [2020-11-11 15:11:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:42,653 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:42,653 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:42,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-11 15:11:42,867 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash 244367777, now seen corresponding path program 33 times [2020-11-11 15:11:42,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:42,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728252033] [2020-11-11 15:11:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:43,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728252033] [2020-11-11 15:11:43,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867499152] [2020-11-11 15:11:43,011 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:43,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:43,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:43,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:43,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:43,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:43,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410648388] [2020-11-11 15:11:43,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:43,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:43,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:43,164 INFO L87 Difference]: Start difference. First operand 1452 states and 3926 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:43,449 INFO L93 Difference]: Finished difference Result 2245 states and 5690 transitions. [2020-11-11 15:11:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:43,453 INFO L225 Difference]: With dead ends: 2245 [2020-11-11 15:11:43,453 INFO L226 Difference]: Without dead ends: 1975 [2020-11-11 15:11:43,453 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-11-11 15:11:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1502. [2020-11-11 15:11:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 2.7155229846768822) internal successors, (4076), 1501 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4076 transitions. [2020-11-11 15:11:43,477 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4076 transitions. Word has length 71 [2020-11-11 15:11:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:43,477 INFO L481 AbstractCegarLoop]: Abstraction has 1502 states and 4076 transitions. [2020-11-11 15:11:43,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4076 transitions. [2020-11-11 15:11:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:43,479 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:43,479 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:43,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 15:11:43,680 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1073078929, now seen corresponding path program 34 times [2020-11-11 15:11:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:43,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566178370] [2020-11-11 15:11:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:43,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566178370] [2020-11-11 15:11:43,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6125398] [2020-11-11 15:11:43,838 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:43,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:43,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:43,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:43,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:43,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:43,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974672594] [2020-11-11 15:11:43,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:43,953 INFO L87 Difference]: Start difference. First operand 1502 states and 4076 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:44,346 INFO L93 Difference]: Finished difference Result 2440 states and 6130 transitions. [2020-11-11 15:11:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:44,349 INFO L225 Difference]: With dead ends: 2440 [2020-11-11 15:11:44,350 INFO L226 Difference]: Without dead ends: 2170 [2020-11-11 15:11:44,350 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2020-11-11 15:11:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1552. [2020-11-11 15:11:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7246937459703418) internal successors, (4226), 1551 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4226 transitions. [2020-11-11 15:11:44,374 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4226 transitions. Word has length 71 [2020-11-11 15:11:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:44,374 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4226 transitions. [2020-11-11 15:11:44,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4226 transitions. [2020-11-11 15:11:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:44,376 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:44,376 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:44,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-11 15:11:44,577 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:44,578 INFO L82 PathProgramCache]: Analyzing trace with hash -649459617, now seen corresponding path program 35 times [2020-11-11 15:11:44,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:44,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366174878] [2020-11-11 15:11:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:44,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366174878] [2020-11-11 15:11:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169720072] [2020-11-11 15:11:44,714 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:44,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:44,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:44,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:44,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:44,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986349956] [2020-11-11 15:11:44,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:44,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:44,800 INFO L87 Difference]: Start difference. First operand 1552 states and 4226 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:45,165 INFO L93 Difference]: Finished difference Result 2445 states and 6190 transitions. [2020-11-11 15:11:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:45,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:45,169 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:11:45,169 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:11:45,170 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:11:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1602. [2020-11-11 15:11:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 2.7332916926920676) internal successors, (4376), 1601 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 4376 transitions. [2020-11-11 15:11:45,200 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 4376 transitions. Word has length 71 [2020-11-11 15:11:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:45,200 INFO L481 AbstractCegarLoop]: Abstraction has 1602 states and 4376 transitions. [2020-11-11 15:11:45,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 4376 transitions. [2020-11-11 15:11:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:45,202 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:45,202 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:45,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:45,403 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2105972047, now seen corresponding path program 36 times [2020-11-11 15:11:45,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:45,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008725889] [2020-11-11 15:11:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:45,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008725889] [2020-11-11 15:11:45,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269621346] [2020-11-11 15:11:45,587 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:45,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:45,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:45,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:45,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:45,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:45,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:45,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871175765] [2020-11-11 15:11:45,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:45,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:45,695 INFO L87 Difference]: Start difference. First operand 1602 states and 4376 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:46,153 INFO L93 Difference]: Finished difference Result 2445 states and 6240 transitions. [2020-11-11 15:11:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:11:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:46,157 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:11:46,157 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:11:46,157 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:11:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1652. [2020-11-11 15:11:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.741368867353119) internal successors, (4526), 1651 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4526 transitions. [2020-11-11 15:11:46,184 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4526 transitions. Word has length 71 [2020-11-11 15:11:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:46,185 INFO L481 AbstractCegarLoop]: Abstraction has 1652 states and 4526 transitions. [2020-11-11 15:11:46,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4526 transitions. [2020-11-11 15:11:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:46,187 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:46,187 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:46,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 15:11:46,388 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash 749405341, now seen corresponding path program 37 times [2020-11-11 15:11:46,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:46,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035576665] [2020-11-11 15:11:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:46,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035576665] [2020-11-11 15:11:46,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508014832] [2020-11-11 15:11:46,548 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:46,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:46,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:46,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:46,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:46,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354209427] [2020-11-11 15:11:46,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:46,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:46,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:46,690 INFO L87 Difference]: Start difference. First operand 1652 states and 4526 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:47,056 INFO L93 Difference]: Finished difference Result 2445 states and 6290 transitions. [2020-11-11 15:11:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:47,059 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:11:47,060 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:11:47,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:11:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1702. [2020-11-11 15:11:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.748971193415638) internal successors, (4676), 1701 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4676 transitions. [2020-11-11 15:11:47,087 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4676 transitions. Word has length 71 [2020-11-11 15:11:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:47,087 INFO L481 AbstractCegarLoop]: Abstraction has 1702 states and 4676 transitions. [2020-11-11 15:11:47,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4676 transitions. [2020-11-11 15:11:47,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:47,090 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:47,090 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:47,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 15:11:47,305 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1714029171, now seen corresponding path program 38 times [2020-11-11 15:11:47,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:47,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459863469] [2020-11-11 15:11:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:47,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459863469] [2020-11-11 15:11:47,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014147991] [2020-11-11 15:11:47,469 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:47,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:47,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:47,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:47,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:47,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350805427] [2020-11-11 15:11:47,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:47,579 INFO L87 Difference]: Start difference. First operand 1702 states and 4676 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:48,168 INFO L93 Difference]: Finished difference Result 2490 states and 6460 transitions. [2020-11-11 15:11:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:48,173 INFO L225 Difference]: With dead ends: 2490 [2020-11-11 15:11:48,173 INFO L226 Difference]: Without dead ends: 2220 [2020-11-11 15:11:48,173 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2020-11-11 15:11:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2020-11-11 15:11:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.764705882352941) internal successors, (4841), 1751 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4841 transitions. [2020-11-11 15:11:48,205 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4841 transitions. Word has length 71 [2020-11-11 15:11:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:48,205 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4841 transitions. [2020-11-11 15:11:48,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4841 transitions. [2020-11-11 15:11:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:48,208 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:48,208 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:48,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:48,410 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1085237669, now seen corresponding path program 39 times [2020-11-11 15:11:48,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:48,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798026797] [2020-11-11 15:11:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:48,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798026797] [2020-11-11 15:11:48,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784676917] [2020-11-11 15:11:48,552 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:48,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:48,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:48,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:48,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492829150] [2020-11-11 15:11:48,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:48,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:48,659 INFO L87 Difference]: Start difference. First operand 1752 states and 4841 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:49,091 INFO L93 Difference]: Finished difference Result 3552 states and 9544 transitions. [2020-11-11 15:11:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:49,096 INFO L225 Difference]: With dead ends: 3552 [2020-11-11 15:11:49,096 INFO L226 Difference]: Without dead ends: 3282 [2020-11-11 15:11:49,097 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2020-11-11 15:11:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1877. [2020-11-11 15:11:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.788912579957356) internal successors, (5232), 1876 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5232 transitions. [2020-11-11 15:11:49,127 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5232 transitions. Word has length 71 [2020-11-11 15:11:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:49,127 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5232 transitions. [2020-11-11 15:11:49,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5232 transitions. [2020-11-11 15:11:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:49,129 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:49,129 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-11 15:11:49,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-11 15:11:49,330 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash 625970285, now seen corresponding path program 40 times [2020-11-11 15:11:49,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:49,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314553920] [2020-11-11 15:11:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:49,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314553920] [2020-11-11 15:11:49,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680528943] [2020-11-11 15:11:49,484 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:49,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:49,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:49,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:49,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:49,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:49,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:49,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496367345] [2020-11-11 15:11:49,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:49,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:49,586 INFO L87 Difference]: Start difference. First operand 1877 states and 5232 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:50,142 INFO L93 Difference]: Finished difference Result 2566 states and 6850 transitions. [2020-11-11 15:11:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-11-11 15:11:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:50,146 INFO L225 Difference]: With dead ends: 2566 [2020-11-11 15:11:50,146 INFO L226 Difference]: Without dead ends: 2155 [2020-11-11 15:11:50,147 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:11:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2020-11-11 15:11:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1391. [2020-11-11 15:11:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.710791366906475) internal successors, (3768), 1390 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 3768 transitions. [2020-11-11 15:11:50,179 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 3768 transitions. Word has length 71 [2020-11-11 15:11:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:50,179 INFO L481 AbstractCegarLoop]: Abstraction has 1391 states and 3768 transitions. [2020-11-11 15:11:50,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 3768 transitions. [2020-11-11 15:11:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:50,182 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:50,182 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:50,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:50,395 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:50,396 INFO L82 PathProgramCache]: Analyzing trace with hash 582428331, now seen corresponding path program 41 times [2020-11-11 15:11:50,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:50,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343731594] [2020-11-11 15:11:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343731594] [2020-11-11 15:11:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996099284] [2020-11-11 15:11:50,616 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:50,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:11:50,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:50,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:50,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:50,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:50,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-11-11 15:11:50,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77438197] [2020-11-11 15:11:50,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:11:50,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:11:50,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:11:50,759 INFO L87 Difference]: Start difference. First operand 1391 states and 3768 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:51,168 INFO L93 Difference]: Finished difference Result 2409 states and 6252 transitions. [2020-11-11 15:11:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:51,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:51,173 INFO L225 Difference]: With dead ends: 2409 [2020-11-11 15:11:51,173 INFO L226 Difference]: Without dead ends: 2075 [2020-11-11 15:11:51,173 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2020-11-11 15:11:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1476. [2020-11-11 15:11:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 2.6698305084745764) internal successors, (3938), 1475 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 3938 transitions. [2020-11-11 15:11:51,197 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 3938 transitions. Word has length 76 [2020-11-11 15:11:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:51,198 INFO L481 AbstractCegarLoop]: Abstraction has 1476 states and 3938 transitions. [2020-11-11 15:11:51,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 3938 transitions. [2020-11-11 15:11:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:51,200 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:51,200 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:51,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-11 15:11:51,409 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1793236313, now seen corresponding path program 42 times [2020-11-11 15:11:51,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:51,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902538997] [2020-11-11 15:11:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:51,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902538997] [2020-11-11 15:11:51,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458494555] [2020-11-11 15:11:51,590 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:51,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:11:51,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:51,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:51,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:51,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:51,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:51,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:51,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315007822] [2020-11-11 15:11:51,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:51,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:51,689 INFO L87 Difference]: Start difference. First operand 1476 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:51,984 INFO L93 Difference]: Finished difference Result 2660 states and 6520 transitions. [2020-11-11 15:11:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:51,987 INFO L225 Difference]: With dead ends: 2660 [2020-11-11 15:11:51,988 INFO L226 Difference]: Without dead ends: 2390 [2020-11-11 15:11:51,988 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-11-11 15:11:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1577. [2020-11-11 15:11:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.681472081218274) internal successors, (4226), 1576 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 4226 transitions. [2020-11-11 15:11:52,012 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 4226 transitions. Word has length 76 [2020-11-11 15:11:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:52,013 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 4226 transitions. [2020-11-11 15:11:52,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 4226 transitions. [2020-11-11 15:11:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:52,015 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:52,015 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:52,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:52,229 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 247943753, now seen corresponding path program 43 times [2020-11-11 15:11:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417163351] [2020-11-11 15:11:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:52,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417163351] [2020-11-11 15:11:52,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32447063] [2020-11-11 15:11:52,431 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 [2020-11-11 15:11:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:52,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:52,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683317882] [2020-11-11 15:11:52,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:52,553 INFO L87 Difference]: Start difference. First operand 1577 states and 4226 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:52,972 INFO L93 Difference]: Finished difference Result 2595 states and 6440 transitions. [2020-11-11 15:11:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:52,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:52,976 INFO L225 Difference]: With dead ends: 2595 [2020-11-11 15:11:52,976 INFO L226 Difference]: Without dead ends: 2325 [2020-11-11 15:11:52,976 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2020-11-11 15:11:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1627. [2020-11-11 15:11:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.6912669126691267) internal successors, (4376), 1626 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4376 transitions. [2020-11-11 15:11:52,999 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4376 transitions. Word has length 76 [2020-11-11 15:11:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:52,999 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 4376 transitions. [2020-11-11 15:11:52,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4376 transitions. [2020-11-11 15:11:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:53,001 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:53,001 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:53,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 15:11:53,202 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:53,203 INFO L82 PathProgramCache]: Analyzing trace with hash -319222121, now seen corresponding path program 44 times [2020-11-11 15:11:53,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:53,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900680126] [2020-11-11 15:11:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:53,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900680126] [2020-11-11 15:11:53,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932153307] [2020-11-11 15:11:53,373 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 [2020-11-11 15:11:53,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:53,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:53,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:53,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:53,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561572789] [2020-11-11 15:11:53,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:53,512 INFO L87 Difference]: Start difference. First operand 1627 states and 4376 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:53,851 INFO L93 Difference]: Finished difference Result 2620 states and 6540 transitions. [2020-11-11 15:11:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:53,853 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:53,853 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:53,854 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1677. [2020-11-11 15:11:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.700477326968974) internal successors, (4526), 1676 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4526 transitions. [2020-11-11 15:11:53,876 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4526 transitions. Word has length 76 [2020-11-11 15:11:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:53,876 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 4526 transitions. [2020-11-11 15:11:53,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4526 transitions. [2020-11-11 15:11:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:53,878 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:53,878 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:54,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 15:11:54,079 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash 509489031, now seen corresponding path program 45 times [2020-11-11 15:11:54,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:54,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67212144] [2020-11-11 15:11:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67212144] [2020-11-11 15:11:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308681797] [2020-11-11 15:11:54,255 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 [2020-11-11 15:11:54,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:11:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:11:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:54,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:54,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:54,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:54,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652242242] [2020-11-11 15:11:54,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:54,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:54,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:54,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:54,406 INFO L87 Difference]: Start difference. First operand 1677 states and 4526 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:54,825 INFO L93 Difference]: Finished difference Result 2620 states and 6590 transitions. [2020-11-11 15:11:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:54,829 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:54,829 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:54,829 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1727. [2020-11-11 15:11:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.709154113557358) internal successors, (4676), 1726 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4676 transitions. [2020-11-11 15:11:54,863 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4676 transitions. Word has length 76 [2020-11-11 15:11:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:54,864 INFO L481 AbstractCegarLoop]: Abstraction has 1727 states and 4676 transitions. [2020-11-11 15:11:54,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4676 transitions. [2020-11-11 15:11:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:54,866 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:54,867 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:55,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 15:11:55,080 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1213049515, now seen corresponding path program 46 times [2020-11-11 15:11:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:55,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477704957] [2020-11-11 15:11:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:55,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477704957] [2020-11-11 15:11:55,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843526685] [2020-11-11 15:11:55,252 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 [2020-11-11 15:11:55,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:55,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:55,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:11:55,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:55,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:55,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:55,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:55,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859347196] [2020-11-11 15:11:55,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:55,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:55,348 INFO L87 Difference]: Start difference. First operand 1727 states and 4676 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:55,747 INFO L93 Difference]: Finished difference Result 2620 states and 6640 transitions. [2020-11-11 15:11:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:55,750 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:55,750 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:55,751 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1777. [2020-11-11 15:11:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 2.7173423423423424) internal successors, (4826), 1776 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 4826 transitions. [2020-11-11 15:11:55,774 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 4826 transitions. Word has length 76 [2020-11-11 15:11:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:55,774 INFO L481 AbstractCegarLoop]: Abstraction has 1777 states and 4826 transitions. [2020-11-11 15:11:55,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 4826 transitions. [2020-11-11 15:11:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:55,776 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:55,776 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:55,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 15:11:55,977 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:55,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1542382149, now seen corresponding path program 47 times [2020-11-11 15:11:55,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:55,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363028482] [2020-11-11 15:11:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:56,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363028482] [2020-11-11 15:11:56,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690859178] [2020-11-11 15:11:56,144 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 [2020-11-11 15:11:56,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:11:56,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:56,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:56,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:56,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:56,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:56,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870986045] [2020-11-11 15:11:56,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:56,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:56,271 INFO L87 Difference]: Start difference. First operand 1777 states and 4826 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:56,848 INFO L93 Difference]: Finished difference Result 2620 states and 6690 transitions. [2020-11-11 15:11:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:56,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:56,851 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:56,851 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:56,851 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:11:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1827. [2020-11-11 15:11:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 2.725082146768894) internal successors, (4976), 1826 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 4976 transitions. [2020-11-11 15:11:56,875 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 4976 transitions. Word has length 76 [2020-11-11 15:11:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:56,875 INFO L481 AbstractCegarLoop]: Abstraction has 1827 states and 4976 transitions. [2020-11-11 15:11:56,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 4976 transitions. [2020-11-11 15:11:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:56,878 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:56,878 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:57,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 15:11:57,078 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:57,079 INFO L82 PathProgramCache]: Analyzing trace with hash 185815443, now seen corresponding path program 48 times [2020-11-11 15:11:57,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:57,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381129102] [2020-11-11 15:11:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:57,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381129102] [2020-11-11 15:11:57,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78207088] [2020-11-11 15:11:57,221 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 [2020-11-11 15:11:57,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:11:57,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:57,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:11:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:57,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:57,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:57,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619135080] [2020-11-11 15:11:57,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:57,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:57,335 INFO L87 Difference]: Start difference. First operand 1827 states and 4976 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:57,779 INFO L93 Difference]: Finished difference Result 2620 states and 6740 transitions. [2020-11-11 15:11:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:57,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:57,782 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:57,782 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:57,783 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1877. [2020-11-11 15:11:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.732409381663113) internal successors, (5126), 1876 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5126 transitions. [2020-11-11 15:11:57,808 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5126 transitions. Word has length 76 [2020-11-11 15:11:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:57,808 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5126 transitions. [2020-11-11 15:11:57,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5126 transitions. [2020-11-11 15:11:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:57,810 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:57,810 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:58,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-11-11 15:11:58,011 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:58,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2017348227, now seen corresponding path program 49 times [2020-11-11 15:11:58,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:58,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419710393] [2020-11-11 15:11:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:58,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419710393] [2020-11-11 15:11:58,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742907451] [2020-11-11 15:11:58,163 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 [2020-11-11 15:11:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:58,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:58,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:58,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:58,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:58,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139694207] [2020-11-11 15:11:58,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:58,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:58,278 INFO L87 Difference]: Start difference. First operand 1877 states and 5126 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:58,909 INFO L93 Difference]: Finished difference Result 2665 states and 6910 transitions. [2020-11-11 15:11:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:11:58,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:58,913 INFO L225 Difference]: With dead ends: 2665 [2020-11-11 15:11:58,913 INFO L226 Difference]: Without dead ends: 2395 [2020-11-11 15:11:58,913 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:11:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2020-11-11 15:11:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1927. [2020-11-11 15:11:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.7471443406022846) internal successors, (5291), 1926 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 5291 transitions. [2020-11-11 15:11:58,940 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 5291 transitions. Word has length 76 [2020-11-11 15:11:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:58,940 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 5291 transitions. [2020-11-11 15:11:58,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 5291 transitions. [2020-11-11 15:11:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:58,943 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:58,943 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:11:59,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:59,144 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1648827567, now seen corresponding path program 50 times [2020-11-11 15:11:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:59,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783803654] [2020-11-11 15:11:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:59,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783803654] [2020-11-11 15:11:59,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681960931] [2020-11-11 15:11:59,285 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:59,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:59,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:59,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:59,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:59,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:59,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:59,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043868860] [2020-11-11 15:11:59,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:59,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:59,377 INFO L87 Difference]: Start difference. First operand 1927 states and 5291 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:59,895 INFO L93 Difference]: Finished difference Result 3752 states and 10044 transitions. [2020-11-11 15:11:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 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 76 [2020-11-11 15:11:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:59,901 INFO L225 Difference]: With dead ends: 3752 [2020-11-11 15:11:59,901 INFO L226 Difference]: Without dead ends: 3482 [2020-11-11 15:11:59,902 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:11:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-11-11 15:11:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2052. [2020-11-11 15:11:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7703559239395417) internal successors, (5682), 2051 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5682 transitions. [2020-11-11 15:11:59,943 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5682 transitions. Word has length 76 [2020-11-11 15:11:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:59,944 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5682 transitions. [2020-11-11 15:11:59,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5682 transitions. [2020-11-11 15:11:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:59,947 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:59,947 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-11-11 15:12:00,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:00,151 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 62380387, now seen corresponding path program 51 times [2020-11-11 15:12:00,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:00,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783953762] [2020-11-11 15:12:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:00,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783953762] [2020-11-11 15:12:00,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887905626] [2020-11-11 15:12:00,300 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 [2020-11-11 15:12:00,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:12:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:00,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:00,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:00,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:00,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:00,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:00,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94580985] [2020-11-11 15:12:00,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:00,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:00,428 INFO L87 Difference]: Start difference. First operand 2052 states and 5682 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:01,113 INFO L93 Difference]: Finished difference Result 3207 states and 8440 transitions. [2020-11-11 15:12:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 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 76 [2020-11-11 15:12:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:01,118 INFO L225 Difference]: With dead ends: 3207 [2020-11-11 15:12:01,118 INFO L226 Difference]: Without dead ends: 2680 [2020-11-11 15:12:01,119 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-11-11 15:12:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2062. [2020-11-11 15:12:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:01,158 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 76 [2020-11-11 15:12:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:01,158 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:01,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:01,161 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:01,161 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:01,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:01,362 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1380054286, now seen corresponding path program 52 times [2020-11-11 15:12:01,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:01,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337313979] [2020-11-11 15:12:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:01,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337313979] [2020-11-11 15:12:01,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569906135] [2020-11-11 15:12:01,561 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 [2020-11-11 15:12:01,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:01,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:01,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:01,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:01,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:01,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:01,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:01,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070579627] [2020-11-11 15:12:01,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:01,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:01,669 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:02,045 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:12:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-11-11 15:12:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:02,049 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:12:02,049 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:12:02,049 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:12:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:12:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:02,075 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:02,075 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:02,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:02,078 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:02,078 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:02,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:02,278 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1369620450, now seen corresponding path program 53 times [2020-11-11 15:12:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:02,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537104575] [2020-11-11 15:12:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:02,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537104575] [2020-11-11 15:12:02,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354169485] [2020-11-11 15:12:02,496 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 [2020-11-11 15:12:02,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:12:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:02,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:02,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:02,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:02,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:02,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072456961] [2020-11-11 15:12:02,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:02,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:02,627 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:03,080 INFO L93 Difference]: Finished difference Result 3100 states and 7890 transitions. [2020-11-11 15:12:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-11-11 15:12:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:03,083 INFO L225 Difference]: With dead ends: 3100 [2020-11-11 15:12:03,084 INFO L226 Difference]: Without dead ends: 2830 [2020-11-11 15:12:03,084 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:12:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-11-11 15:12:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2062. [2020-11-11 15:12:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:03,113 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:03,113 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:03,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:03,115 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:03,115 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:03,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-11 15:12:03,317 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash 802454576, now seen corresponding path program 54 times [2020-11-11 15:12:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483332059] [2020-11-11 15:12:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:03,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483332059] [2020-11-11 15:12:03,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793313553] [2020-11-11 15:12:03,506 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 [2020-11-11 15:12:03,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:03,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:03,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:03,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:03,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:03,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434185683] [2020-11-11 15:12:03,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:03,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:03,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:03,620 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:04,034 INFO L93 Difference]: Finished difference Result 3055 states and 7800 transitions. [2020-11-11 15:12:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-11-11 15:12:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:04,037 INFO L225 Difference]: With dead ends: 3055 [2020-11-11 15:12:04,038 INFO L226 Difference]: Without dead ends: 2785 [2020-11-11 15:12:04,038 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:12:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2020-11-11 15:12:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2062. [2020-11-11 15:12:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:04,066 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:04,066 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:04,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:04,068 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:04,068 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:04,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:04,269 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1631165728, now seen corresponding path program 55 times [2020-11-11 15:12:04,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:04,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736488156] [2020-11-11 15:12:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736488156] [2020-11-11 15:12:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018714537] [2020-11-11 15:12:04,470 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 [2020-11-11 15:12:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:04,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:04,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:04,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:04,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842716917] [2020-11-11 15:12:04,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:04,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:04,603 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:05,195 INFO L93 Difference]: Finished difference Result 3005 states and 7700 transitions. [2020-11-11 15:12:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-11-11 15:12:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:05,199 INFO L225 Difference]: With dead ends: 3005 [2020-11-11 15:12:05,199 INFO L226 Difference]: Without dead ends: 2735 [2020-11-11 15:12:05,200 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:12:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2020-11-11 15:12:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2062. [2020-11-11 15:12:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:05,224 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:05,225 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:05,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:05,227 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:05,227 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:05,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-11 15:12:05,427 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash -91372818, now seen corresponding path program 56 times [2020-11-11 15:12:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:05,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041915273] [2020-11-11 15:12:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041915273] [2020-11-11 15:12:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936751355] [2020-11-11 15:12:05,607 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 [2020-11-11 15:12:05,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:05,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:05,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:05,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:05,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001149862] [2020-11-11 15:12:05,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:05,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:05,713 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,190 INFO L93 Difference]: Finished difference Result 2955 states and 7600 transitions. [2020-11-11 15:12:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:06,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-11-11 15:12:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,194 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:12:06,194 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:12:06,195 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:12:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:12:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2062. [2020-11-11 15:12:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:06,227 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:06,227 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:06,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:06,230 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:06,230 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:06,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:06,444 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1630908450, now seen corresponding path program 57 times [2020-11-11 15:12:06,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:06,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404611993] [2020-11-11 15:12:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:06,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404611993] [2020-11-11 15:12:06,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064627007] [2020-11-11 15:12:06,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:12:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:12:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:06,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:06,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:06,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:06,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9679323] [2020-11-11 15:12:06,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:06,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:06,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:06,735 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:07,358 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:12:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-11-11 15:12:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:07,363 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:12:07,363 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:12:07,364 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:12:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:12:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:07,394 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:07,394 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:07,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:07,396 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:07,397 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:07,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-11 15:12:07,612 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1307492140, now seen corresponding path program 58 times [2020-11-11 15:12:07,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:07,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284896590] [2020-11-11 15:12:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284896590] [2020-11-11 15:12:07,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123624930] [2020-11-11 15:12:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:07,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:07,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:07,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:07,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:07,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:07,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935330486] [2020-11-11 15:12:07,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:07,886 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:08,426 INFO L93 Difference]: Finished difference Result 2855 states and 7400 transitions. [2020-11-11 15:12:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-11-11 15:12:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:08,431 INFO L225 Difference]: With dead ends: 2855 [2020-11-11 15:12:08,431 INFO L226 Difference]: Without dead ends: 2585 [2020-11-11 15:12:08,431 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2020-11-11 15:12:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2062. [2020-11-11 15:12:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:08,456 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:08,457 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:08,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:08,458 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:08,459 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:08,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:08,660 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1155942372, now seen corresponding path program 59 times [2020-11-11 15:12:08,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:08,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458144409] [2020-11-11 15:12:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458144409] [2020-11-11 15:12:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123520093] [2020-11-11 15:12:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:08,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:12:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:08,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:08,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:08,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:08,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581760011] [2020-11-11 15:12:08,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:08,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:08,970 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:09,656 INFO L93 Difference]: Finished difference Result 2850 states and 7410 transitions. [2020-11-11 15:12:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:09,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-11-11 15:12:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:09,660 INFO L225 Difference]: With dead ends: 2850 [2020-11-11 15:12:09,660 INFO L226 Difference]: Without dead ends: 2580 [2020-11-11 15:12:09,660 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-11-11 15:12:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2062. [2020-11-11 15:12:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7612809315866085) internal successors, (5691), 2061 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5691 transitions. [2020-11-11 15:12:09,687 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5691 transitions. Word has length 81 [2020-11-11 15:12:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:09,687 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5691 transitions. [2020-11-11 15:12:09,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-11-11 15:12:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5691 transitions. [2020-11-11 15:12:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:09,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:09,690 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:09,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:09,892 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:09,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash -527150870, now seen corresponding path program 60 times [2020-11-11 15:12:09,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:09,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427553953] [2020-11-11 15:12:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:10,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427553953] [2020-11-11 15:12:10,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704308630] [2020-11-11 15:12:10,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:10,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:10,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:10,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:10,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:10,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014426302] [2020-11-11 15:12:10,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:10,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:10,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:10,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:10,187 INFO L87 Difference]: Start difference. First operand 2062 states and 5691 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:10,792 INFO L93 Difference]: Finished difference Result 3912 states and 10494 transitions. [2020-11-11 15:12:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-11-11 15:12:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:10,796 INFO L225 Difference]: With dead ends: 3912 [2020-11-11 15:12:10,797 INFO L226 Difference]: Without dead ends: 3642 [2020-11-11 15:12:10,797 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2020-11-11 15:12:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 2187. [2020-11-11 15:12:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 2.7822506861848124) internal successors, (6082), 2186 states have internal predecessors, (6082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 6082 transitions. [2020-11-11 15:12:10,856 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 6082 transitions. Word has length 81 [2020-11-11 15:12:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:10,856 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 6082 transitions. [2020-11-11 15:12:10,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 6082 transitions. [2020-11-11 15:12:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:10,859 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:10,859 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-11-11 15:12:11,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-11-11 15:12:11,074 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1184057084, now seen corresponding path program 61 times [2020-11-11 15:12:11,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:11,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546804999] [2020-11-11 15:12:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546804999] [2020-11-11 15:12:11,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117612870] [2020-11-11 15:12:11,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:11,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:11,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:11,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:11,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:11,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764131429] [2020-11-11 15:12:11,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:11,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:11,359 INFO L87 Difference]: Start difference. First operand 2187 states and 6082 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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) [2020-11-11 15:12:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:12,193 INFO L93 Difference]: Finished difference Result 3307 states and 8740 transitions. [2020-11-11 15:12:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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 81 [2020-11-11 15:12:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:12,197 INFO L225 Difference]: With dead ends: 3307 [2020-11-11 15:12:12,197 INFO L226 Difference]: Without dead ends: 2780 [2020-11-11 15:12:12,197 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:12:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-11-11 15:12:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1601. [2020-11-11 15:12:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 2.69875) internal successors, (4318), 1600 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 4318 transitions. [2020-11-11 15:12:12,220 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 4318 transitions. Word has length 81 [2020-11-11 15:12:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:12,220 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 4318 transitions. [2020-11-11 15:12:12,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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) [2020-11-11 15:12:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 4318 transitions. [2020-11-11 15:12:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:12,222 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:12,222 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:12,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:12,423 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1440295804, now seen corresponding path program 62 times [2020-11-11 15:12:12,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:12,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350933895] [2020-11-11 15:12:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:12,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350933895] [2020-11-11 15:12:12,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578975569] [2020-11-11 15:12:12,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:12,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:12,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:12,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:12,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:12,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:12,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-11-11 15:12:12,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056226231] [2020-11-11 15:12:12,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:12:12,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:12:12,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:12:12,840 INFO L87 Difference]: Start difference. First operand 1601 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:13,310 INFO L93 Difference]: Finished difference Result 2669 states and 6902 transitions. [2020-11-11 15:12:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:13,314 INFO L225 Difference]: With dead ends: 2669 [2020-11-11 15:12:13,314 INFO L226 Difference]: Without dead ends: 2335 [2020-11-11 15:12:13,314 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:12:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2020-11-11 15:12:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1686. [2020-11-11 15:12:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.6635014836795254) internal successors, (4488), 1685 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4488 transitions. [2020-11-11 15:12:13,337 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4488 transitions. Word has length 86 [2020-11-11 15:12:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:13,337 INFO L481 AbstractCegarLoop]: Abstraction has 1686 states and 4488 transitions. [2020-11-11 15:12:13,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4488 transitions. [2020-11-11 15:12:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:13,339 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:13,339 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:13,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:13,540 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1109041322, now seen corresponding path program 63 times [2020-11-11 15:12:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115188617] [2020-11-11 15:12:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:13,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115188617] [2020-11-11 15:12:13,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871529494] [2020-11-11 15:12:13,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:13,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:13,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:13,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:13,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:13,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640186459] [2020-11-11 15:12:13,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:13,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:13,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:13,891 INFO L87 Difference]: Start difference. First operand 1686 states and 4488 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:14,216 INFO L93 Difference]: Finished difference Result 3020 states and 7370 transitions. [2020-11-11 15:12:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:14,220 INFO L225 Difference]: With dead ends: 3020 [2020-11-11 15:12:14,220 INFO L226 Difference]: Without dead ends: 2750 [2020-11-11 15:12:14,221 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-11-11 15:12:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1787. [2020-11-11 15:12:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.674132138857783) internal successors, (4776), 1786 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4776 transitions. [2020-11-11 15:12:14,259 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4776 transitions. Word has length 86 [2020-11-11 15:12:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:14,259 INFO L481 AbstractCegarLoop]: Abstraction has 1787 states and 4776 transitions. [2020-11-11 15:12:14,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4776 transitions. [2020-11-11 15:12:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:14,262 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:14,262 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:14,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-11 15:12:14,477 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1122637414, now seen corresponding path program 64 times [2020-11-11 15:12:14,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:14,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040776316] [2020-11-11 15:12:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040776316] [2020-11-11 15:12:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512201337] [2020-11-11 15:12:14,701 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 [2020-11-11 15:12:14,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:14,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:14,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:14,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:14,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625229029] [2020-11-11 15:12:14,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:14,829 INFO L87 Difference]: Start difference. First operand 1787 states and 4776 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:15,300 INFO L93 Difference]: Finished difference Result 2955 states and 7290 transitions. [2020-11-11 15:12:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:15,305 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:12:15,305 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:12:15,305 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:12:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1837. [2020-11-11 15:12:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.683006535947712) internal successors, (4926), 1836 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 4926 transitions. [2020-11-11 15:12:15,333 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 4926 transitions. Word has length 86 [2020-11-11 15:12:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:15,333 INFO L481 AbstractCegarLoop]: Abstraction has 1837 states and 4926 transitions. [2020-11-11 15:12:15,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 4926 transitions. [2020-11-11 15:12:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:15,335 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:15,335 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:15,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:15,536 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1560601496, now seen corresponding path program 65 times [2020-11-11 15:12:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:15,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327830485] [2020-11-11 15:12:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327830485] [2020-11-11 15:12:15,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721817145] [2020-11-11 15:12:15,735 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 [2020-11-11 15:12:15,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:15,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:15,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:15,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:15,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215068446] [2020-11-11 15:12:15,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:15,860 INFO L87 Difference]: Start difference. First operand 1837 states and 4926 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:16,274 INFO L93 Difference]: Finished difference Result 2980 states and 7390 transitions. [2020-11-11 15:12:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:16,278 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:16,279 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:16,279 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1887. [2020-11-11 15:12:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.6914103923647934) internal successors, (5076), 1886 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5076 transitions. [2020-11-11 15:12:16,322 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5076 transitions. Word has length 86 [2020-11-11 15:12:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:16,323 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 5076 transitions. [2020-11-11 15:12:16,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5076 transitions. [2020-11-11 15:12:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:16,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:16,325 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:16,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 15:12:16,540 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1189073240, now seen corresponding path program 66 times [2020-11-11 15:12:16,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:16,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803112625] [2020-11-11 15:12:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803112625] [2020-11-11 15:12:16,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983517369] [2020-11-11 15:12:16,793 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 [2020-11-11 15:12:16,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:16,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:16,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:16,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:16,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735923239] [2020-11-11 15:12:16,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:16,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:16,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:16,930 INFO L87 Difference]: Start difference. First operand 1887 states and 5076 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:17,495 INFO L93 Difference]: Finished difference Result 2980 states and 7440 transitions. [2020-11-11 15:12:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:17,499 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:17,499 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:17,500 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:12:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1937. [2020-11-11 15:12:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.699380165289256) internal successors, (5226), 1936 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 5226 transitions. [2020-11-11 15:12:17,523 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 5226 transitions. Word has length 86 [2020-11-11 15:12:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:17,523 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 5226 transitions. [2020-11-11 15:12:17,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 5226 transitions. [2020-11-11 15:12:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:17,525 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:17,525 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:17,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 15:12:17,726 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 621907366, now seen corresponding path program 67 times [2020-11-11 15:12:17,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:17,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986028020] [2020-11-11 15:12:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:17,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986028020] [2020-11-11 15:12:17,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222961029] [2020-11-11 15:12:17,935 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 [2020-11-11 15:12:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:17,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:18,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:18,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:18,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844211860] [2020-11-11 15:12:18,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:18,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:18,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:18,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:18,054 INFO L87 Difference]: Start difference. First operand 1937 states and 5226 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:18,530 INFO L93 Difference]: Finished difference Result 2980 states and 7490 transitions. [2020-11-11 15:12:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:18,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:18,534 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:18,535 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:18,535 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1987. [2020-11-11 15:12:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.706948640483384) internal successors, (5376), 1986 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5376 transitions. [2020-11-11 15:12:18,561 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5376 transitions. Word has length 86 [2020-11-11 15:12:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:18,561 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5376 transitions. [2020-11-11 15:12:18,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5376 transitions. [2020-11-11 15:12:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:18,563 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:18,563 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:18,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-11 15:12:18,764 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:18,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1450618518, now seen corresponding path program 68 times [2020-11-11 15:12:18,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:18,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482983878] [2020-11-11 15:12:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:18,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482983878] [2020-11-11 15:12:18,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665537574] [2020-11-11 15:12:18,977 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 [2020-11-11 15:12:19,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:19,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:19,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:19,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:19,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:19,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:19,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:19,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:19,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764850114] [2020-11-11 15:12:19,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:19,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:19,102 INFO L87 Difference]: Start difference. First operand 1987 states and 5376 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:19,757 INFO L93 Difference]: Finished difference Result 2980 states and 7540 transitions. [2020-11-11 15:12:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:19,762 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:19,762 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:19,764 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:12:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2037. [2020-11-11 15:12:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 2.7141453831041256) internal successors, (5526), 2036 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 5526 transitions. [2020-11-11 15:12:19,793 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 5526 transitions. Word has length 86 [2020-11-11 15:12:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:19,794 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 5526 transitions. [2020-11-11 15:12:19,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 5526 transitions. [2020-11-11 15:12:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:19,795 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:19,795 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:19,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:19,996 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -271920028, now seen corresponding path program 69 times [2020-11-11 15:12:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:19,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381002760] [2020-11-11 15:12:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381002760] [2020-11-11 15:12:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272014294] [2020-11-11 15:12:20,171 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 [2020-11-11 15:12:20,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:12:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:20,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:20,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:20,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:20,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527096580] [2020-11-11 15:12:20,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:20,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:20,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:20,307 INFO L87 Difference]: Start difference. First operand 2037 states and 5526 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:20,854 INFO L93 Difference]: Finished difference Result 2980 states and 7590 transitions. [2020-11-11 15:12:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:20,857 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:20,857 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:20,858 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:12:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2087. [2020-11-11 15:12:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.7209971236816872) internal successors, (5676), 2086 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 5676 transitions. [2020-11-11 15:12:20,888 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 5676 transitions. Word has length 86 [2020-11-11 15:12:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:20,888 INFO L481 AbstractCegarLoop]: Abstraction has 2087 states and 5676 transitions. [2020-11-11 15:12:20,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 5676 transitions. [2020-11-11 15:12:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:20,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:20,890 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:21,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:21,091 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1811455660, now seen corresponding path program 70 times [2020-11-11 15:12:21,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:21,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715336924] [2020-11-11 15:12:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715336924] [2020-11-11 15:12:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643539261] [2020-11-11 15:12:21,277 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 [2020-11-11 15:12:21,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:21,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:21,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:21,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:21,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:21,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:21,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798123] [2020-11-11 15:12:21,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:21,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:21,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:21,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:21,421 INFO L87 Difference]: Start difference. First operand 2087 states and 5676 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:22,157 INFO L93 Difference]: Finished difference Result 2980 states and 7640 transitions. [2020-11-11 15:12:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:22,160 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:22,160 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:22,161 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1363, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:12:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2137. [2020-11-11 15:12:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 2.7275280898876404) internal successors, (5826), 2136 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 5826 transitions. [2020-11-11 15:12:22,189 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 5826 transitions. Word has length 86 [2020-11-11 15:12:22,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:22,190 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 5826 transitions. [2020-11-11 15:12:22,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 5826 transitions. [2020-11-11 15:12:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:22,192 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:22,192 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:22,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:22,393 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1126944930, now seen corresponding path program 71 times [2020-11-11 15:12:22,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:22,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145512507] [2020-11-11 15:12:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145512507] [2020-11-11 15:12:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956020442] [2020-11-11 15:12:22,566 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 [2020-11-11 15:12:22,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:22,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:22,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:22,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157375206] [2020-11-11 15:12:22,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:22,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:22,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:22,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:22,672 INFO L87 Difference]: Start difference. First operand 2137 states and 5826 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:23,290 INFO L93 Difference]: Finished difference Result 3010 states and 7765 transitions. [2020-11-11 15:12:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:23,294 INFO L225 Difference]: With dead ends: 3010 [2020-11-11 15:12:23,294 INFO L226 Difference]: Without dead ends: 2740 [2020-11-11 15:12:23,294 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:12:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2020-11-11 15:12:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2187. [2020-11-11 15:12:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 2.738334858188472) internal successors, (5986), 2186 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 5986 transitions. [2020-11-11 15:12:23,324 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 5986 transitions. Word has length 86 [2020-11-11 15:12:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:23,324 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 5986 transitions. [2020-11-11 15:12:23,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 5986 transitions. [2020-11-11 15:12:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:23,326 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:23,326 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:23,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:23,527 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1336489582, now seen corresponding path program 72 times [2020-11-11 15:12:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:23,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968163582] [2020-11-11 15:12:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968163582] [2020-11-11 15:12:23,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847339006] [2020-11-11 15:12:23,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:23,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:23,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:23,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:23,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434182350] [2020-11-11 15:12:23,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:23,847 INFO L87 Difference]: Start difference. First operand 2187 states and 5986 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:24,654 INFO L93 Difference]: Finished difference Result 3469 states and 9034 transitions. [2020-11-11 15:12:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:12:24,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:24,658 INFO L225 Difference]: With dead ends: 3469 [2020-11-11 15:12:24,658 INFO L226 Difference]: Without dead ends: 2900 [2020-11-11 15:12:24,659 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:12:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2020-11-11 15:12:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2237. [2020-11-11 15:12:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.7464221824686943) internal successors, (6141), 2236 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6141 transitions. [2020-11-11 15:12:24,689 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6141 transitions. Word has length 86 [2020-11-11 15:12:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:24,690 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 6141 transitions. [2020-11-11 15:12:24,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6141 transitions. [2020-11-11 15:12:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:24,692 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:24,692 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:24,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-11-11 15:12:24,893 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash -707698080, now seen corresponding path program 73 times [2020-11-11 15:12:24,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:24,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191232795] [2020-11-11 15:12:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:25,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191232795] [2020-11-11 15:12:25,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199434029] [2020-11-11 15:12:25,098 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 [2020-11-11 15:12:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:25,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:25,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:25,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:25,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:25,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:25,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711774186] [2020-11-11 15:12:25,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:25,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:25,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:25,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:25,201 INFO L87 Difference]: Start difference. First operand 2237 states and 6141 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:25,866 INFO L93 Difference]: Finished difference Result 4112 states and 10994 transitions. [2020-11-11 15:12:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:25,871 INFO L225 Difference]: With dead ends: 4112 [2020-11-11 15:12:25,872 INFO L226 Difference]: Without dead ends: 3842 [2020-11-11 15:12:25,872 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:12:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2020-11-11 15:12:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 2362. [2020-11-11 15:12:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.7666243117323166) internal successors, (6532), 2361 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 6532 transitions. [2020-11-11 15:12:25,908 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 6532 transitions. Word has length 86 [2020-11-11 15:12:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:25,908 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 6532 transitions. [2020-11-11 15:12:25,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 6532 transitions. [2020-11-11 15:12:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:25,911 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:25,911 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-11-11 15:12:26,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:26,112 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1003509874, now seen corresponding path program 74 times [2020-11-11 15:12:26,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:26,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898074871] [2020-11-11 15:12:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:26,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898074871] [2020-11-11 15:12:26,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730660551] [2020-11-11 15:12:26,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:26,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:26,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:26,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:26,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:26,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592088921] [2020-11-11 15:12:26,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:26,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:26,438 INFO L87 Difference]: Start difference. First operand 2362 states and 6532 transitions. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:27,327 INFO L93 Difference]: Finished difference Result 3487 states and 9150 transitions. [2020-11-11 15:12:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 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 86 [2020-11-11 15:12:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:27,331 INFO L225 Difference]: With dead ends: 3487 [2020-11-11 15:12:27,331 INFO L226 Difference]: Without dead ends: 2960 [2020-11-11 15:12:27,331 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1724, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:12:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2020-11-11 15:12:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 1812. [2020-11-11 15:12:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.6924351187189397) internal successors, (4876), 1811 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 4876 transitions. [2020-11-11 15:12:27,356 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 4876 transitions. Word has length 86 [2020-11-11 15:12:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:27,357 INFO L481 AbstractCegarLoop]: Abstraction has 1812 states and 4876 transitions. [2020-11-11 15:12:27,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 4876 transitions. [2020-11-11 15:12:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:27,360 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:27,362 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:27,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:27,578 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1275110147, now seen corresponding path program 75 times [2020-11-11 15:12:27,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:27,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852953800] [2020-11-11 15:12:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:27,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852953800] [2020-11-11 15:12:27,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967984574] [2020-11-11 15:12:27,839 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 [2020-11-11 15:12:27,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:27,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:27,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:27,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:28,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:28,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:28,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:28,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885528621] [2020-11-11 15:12:28,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:28,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:28,034 INFO L87 Difference]: Start difference. First operand 1812 states and 4876 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:28,464 INFO L93 Difference]: Finished difference Result 2805 states and 7040 transitions. [2020-11-11 15:12:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:28,469 INFO L225 Difference]: With dead ends: 2805 [2020-11-11 15:12:28,469 INFO L226 Difference]: Without dead ends: 2535 [2020-11-11 15:12:28,469 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2020-11-11 15:12:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1862. [2020-11-11 15:12:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 2.7006985491671145) internal successors, (5026), 1861 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5026 transitions. [2020-11-11 15:12:28,494 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5026 transitions. Word has length 91 [2020-11-11 15:12:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:28,494 INFO L481 AbstractCegarLoop]: Abstraction has 1862 states and 5026 transitions. [2020-11-11 15:12:28,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5026 transitions. [2020-11-11 15:12:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:28,497 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:28,497 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:28,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-11 15:12:28,699 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash -956568589, now seen corresponding path program 76 times [2020-11-11 15:12:28,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:28,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034030914] [2020-11-11 15:12:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:28,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034030914] [2020-11-11 15:12:28,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711062430] [2020-11-11 15:12:28,942 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 [2020-11-11 15:12:29,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:29,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:29,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:29,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:29,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146773445] [2020-11-11 15:12:29,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:29,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:29,088 INFO L87 Difference]: Start difference. First operand 1862 states and 5026 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:29,577 INFO L93 Difference]: Finished difference Result 3100 states and 7680 transitions. [2020-11-11 15:12:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:12:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:29,581 INFO L225 Difference]: With dead ends: 3100 [2020-11-11 15:12:29,582 INFO L226 Difference]: Without dead ends: 2830 [2020-11-11 15:12:29,582 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-11-11 15:12:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 1912. [2020-11-11 15:12:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.7085295656724226) internal successors, (5176), 1911 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 5176 transitions. [2020-11-11 15:12:29,610 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 5176 transitions. Word has length 91 [2020-11-11 15:12:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:29,611 INFO L481 AbstractCegarLoop]: Abstraction has 1912 states and 5176 transitions. [2020-11-11 15:12:29,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 5176 transitions. [2020-11-11 15:12:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:29,612 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:29,613 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:29,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:29,813 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:29,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1394532671, now seen corresponding path program 77 times [2020-11-11 15:12:29,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:29,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606282019] [2020-11-11 15:12:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:30,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606282019] [2020-11-11 15:12:30,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106487284] [2020-11-11 15:12:30,036 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 [2020-11-11 15:12:30,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:30,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:30,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:30,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:30,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828808115] [2020-11-11 15:12:30,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:30,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:30,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:30,144 INFO L87 Difference]: Start difference. First operand 1912 states and 5176 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:30,661 INFO L93 Difference]: Finished difference Result 3105 states and 7740 transitions. [2020-11-11 15:12:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:30,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:30,665 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:12:30,665 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:12:30,666 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:12:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1962. [2020-11-11 15:12:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 2.715961244263131) internal successors, (5326), 1961 states have internal predecessors, (5326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 5326 transitions. [2020-11-11 15:12:30,690 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 5326 transitions. Word has length 91 [2020-11-11 15:12:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:30,690 INFO L481 AbstractCegarLoop]: Abstraction has 1962 states and 5326 transitions. [2020-11-11 15:12:30,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 5326 transitions. [2020-11-11 15:12:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:30,691 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:30,692 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:30,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 15:12:30,892 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1355142065, now seen corresponding path program 78 times [2020-11-11 15:12:30,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:30,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799863085] [2020-11-11 15:12:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799863085] [2020-11-11 15:12:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423374387] [2020-11-11 15:12:31,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:31,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:31,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:31,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:31,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:31,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:31,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:31,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:31,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324456536] [2020-11-11 15:12:31,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:31,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:31,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:31,263 INFO L87 Difference]: Start difference. First operand 1962 states and 5326 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:31,875 INFO L93 Difference]: Finished difference Result 3105 states and 7790 transitions. [2020-11-11 15:12:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:12:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:31,878 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:12:31,878 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:12:31,879 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:12:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2012. [2020-11-11 15:12:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 2.7230233714569865) internal successors, (5476), 2011 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 5476 transitions. [2020-11-11 15:12:31,907 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 5476 transitions. Word has length 91 [2020-11-11 15:12:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:31,907 INFO L481 AbstractCegarLoop]: Abstraction has 2012 states and 5476 transitions. [2020-11-11 15:12:31,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 5476 transitions. [2020-11-11 15:12:31,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:31,909 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:31,909 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:32,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:32,110 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash 787976191, now seen corresponding path program 79 times [2020-11-11 15:12:32,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:32,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595309353] [2020-11-11 15:12:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:32,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595309353] [2020-11-11 15:12:32,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537803089] [2020-11-11 15:12:32,329 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 [2020-11-11 15:12:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:32,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:32,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:32,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:32,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655525751] [2020-11-11 15:12:32,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:32,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:32,430 INFO L87 Difference]: Start difference. First operand 2012 states and 5476 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:32,990 INFO L93 Difference]: Finished difference Result 3105 states and 7840 transitions. [2020-11-11 15:12:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:32,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:32,994 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:12:32,994 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:12:32,995 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:12:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2062. [2020-11-11 15:12:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7297428432799613) internal successors, (5626), 2061 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5626 transitions. [2020-11-11 15:12:33,022 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5626 transitions. Word has length 91 [2020-11-11 15:12:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:33,022 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5626 transitions. [2020-11-11 15:12:33,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5626 transitions. [2020-11-11 15:12:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:33,024 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:33,024 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:33,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-11-11 15:12:33,225 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:33,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1616687343, now seen corresponding path program 80 times [2020-11-11 15:12:33,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:33,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015507714] [2020-11-11 15:12:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015507714] [2020-11-11 15:12:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435729026] [2020-11-11 15:12:33,480 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 [2020-11-11 15:12:33,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:33,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:33,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:33,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:33,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:33,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056827327] [2020-11-11 15:12:33,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:33,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:33,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:33,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:33,606 INFO L87 Difference]: Start difference. First operand 2062 states and 5626 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:34,337 INFO L93 Difference]: Finished difference Result 3105 states and 7890 transitions. [2020-11-11 15:12:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:12:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:34,341 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:12:34,341 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:12:34,341 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:12:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:12:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2112. [2020-11-11 15:12:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.7361440075793464) internal successors, (5776), 2111 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 5776 transitions. [2020-11-11 15:12:34,373 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 5776 transitions. Word has length 91 [2020-11-11 15:12:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:34,373 INFO L481 AbstractCegarLoop]: Abstraction has 2112 states and 5776 transitions. [2020-11-11 15:12:34,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 5776 transitions. [2020-11-11 15:12:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:34,376 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:34,377 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:34,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:34,591 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash -105851203, now seen corresponding path program 81 times [2020-11-11 15:12:34,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:34,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85075531] [2020-11-11 15:12:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85075531] [2020-11-11 15:12:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041026576] [2020-11-11 15:12:34,794 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 [2020-11-11 15:12:34,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:12:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:34,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:34,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:34,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:34,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702456092] [2020-11-11 15:12:34,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:34,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:34,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:34,909 INFO L87 Difference]: Start difference. First operand 2112 states and 5776 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:35,522 INFO L93 Difference]: Finished difference Result 3105 states and 7940 transitions. [2020-11-11 15:12:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:35,526 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:12:35,526 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:12:35,526 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:12:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:12:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2162. [2020-11-11 15:12:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 2.742248958815363) internal successors, (5926), 2161 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 5926 transitions. [2020-11-11 15:12:35,558 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 5926 transitions. Word has length 91 [2020-11-11 15:12:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:35,558 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 5926 transitions. [2020-11-11 15:12:35,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 5926 transitions. [2020-11-11 15:12:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:35,560 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:35,560 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:35,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-11-11 15:12:35,761 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1645386835, now seen corresponding path program 82 times [2020-11-11 15:12:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:35,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883157180] [2020-11-11 15:12:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883157180] [2020-11-11 15:12:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74315097] [2020-11-11 15:12:35,975 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 [2020-11-11 15:12:36,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:36,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:36,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:36,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:36,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:36,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:36,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726899494] [2020-11-11 15:12:36,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:36,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:36,118 INFO L87 Difference]: Start difference. First operand 2162 states and 5926 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:36,907 INFO L93 Difference]: Finished difference Result 3105 states and 7990 transitions. [2020-11-11 15:12:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:12:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:12:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:36,912 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:12:36,912 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:12:36,912 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:12:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2212. [2020-11-11 15:12:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.748077792853912) internal successors, (6076), 2211 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 6076 transitions. [2020-11-11 15:12:36,943 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 6076 transitions. Word has length 91 [2020-11-11 15:12:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:36,943 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 6076 transitions. [2020-11-11 15:12:36,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 6076 transitions. [2020-11-11 15:12:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:36,945 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:36,945 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:37,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:37,146 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:37,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1293013755, now seen corresponding path program 83 times [2020-11-11 15:12:37,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:37,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069080811] [2020-11-11 15:12:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:37,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069080811] [2020-11-11 15:12:37,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852535954] [2020-11-11 15:12:37,342 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 [2020-11-11 15:12:37,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:37,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:37,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:37,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:37,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66390866] [2020-11-11 15:12:37,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:37,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:37,467 INFO L87 Difference]: Start difference. First operand 2212 states and 6076 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:38,128 INFO L93 Difference]: Finished difference Result 3135 states and 8115 transitions. [2020-11-11 15:12:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:12:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:38,131 INFO L225 Difference]: With dead ends: 3135 [2020-11-11 15:12:38,132 INFO L226 Difference]: Without dead ends: 2865 [2020-11-11 15:12:38,132 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-11-11 15:12:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2262. [2020-11-11 15:12:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2261 states have (on average 2.7580716497125164) internal successors, (6236), 2261 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 6236 transitions. [2020-11-11 15:12:38,165 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 6236 transitions. Word has length 91 [2020-11-11 15:12:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:38,166 INFO L481 AbstractCegarLoop]: Abstraction has 2262 states and 6236 transitions. [2020-11-11 15:12:38,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 6236 transitions. [2020-11-11 15:12:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:38,168 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:38,168 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:38,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:38,369 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1170420757, now seen corresponding path program 84 times [2020-11-11 15:12:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:38,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001875920] [2020-11-11 15:12:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:38,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001875920] [2020-11-11 15:12:38,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981366524] [2020-11-11 15:12:38,588 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 [2020-11-11 15:12:38,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:12:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:38,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:38,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:38,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875303845] [2020-11-11 15:12:38,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:38,735 INFO L87 Difference]: Start difference. First operand 2262 states and 6236 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:39,701 INFO L93 Difference]: Finished difference Result 3594 states and 9384 transitions. [2020-11-11 15:12:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:12:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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 91 [2020-11-11 15:12:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:39,705 INFO L225 Difference]: With dead ends: 3594 [2020-11-11 15:12:39,705 INFO L226 Difference]: Without dead ends: 3025 [2020-11-11 15:12:39,705 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1876, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:12:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2020-11-11 15:12:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2312. [2020-11-11 15:12:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.76546949372566) internal successors, (6391), 2311 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 6391 transitions. [2020-11-11 15:12:39,736 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 6391 transitions. Word has length 91 [2020-11-11 15:12:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:39,736 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 6391 transitions. [2020-11-11 15:12:39,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2020-11-11 15:12:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 6391 transitions. [2020-11-11 15:12:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:39,738 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:39,738 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:39,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:39,939 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -541629255, now seen corresponding path program 85 times [2020-11-11 15:12:39,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:39,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180899362] [2020-11-11 15:12:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180899362] [2020-11-11 15:12:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184248823] [2020-11-11 15:12:40,119 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 [2020-11-11 15:12:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:40,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:40,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:40,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844276013] [2020-11-11 15:12:40,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:40,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:40,267 INFO L87 Difference]: Start difference. First operand 2312 states and 6391 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:40,964 INFO L93 Difference]: Finished difference Result 4212 states and 11294 transitions. [2020-11-11 15:12:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:40,969 INFO L225 Difference]: With dead ends: 4212 [2020-11-11 15:12:40,970 INFO L226 Difference]: Without dead ends: 3942 [2020-11-11 15:12:40,970 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=645, Invalid=1611, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:12:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2020-11-11 15:12:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 2437. [2020-11-11 15:12:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 2.784072249589491) internal successors, (6782), 2436 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 6782 transitions. [2020-11-11 15:12:41,008 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 6782 transitions. Word has length 91 [2020-11-11 15:12:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:41,008 INFO L481 AbstractCegarLoop]: Abstraction has 2437 states and 6782 transitions. [2020-11-11 15:12:41,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 6782 transitions. [2020-11-11 15:12:41,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:41,010 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:41,010 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-11-11 15:12:41,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:41,211 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1169578699, now seen corresponding path program 86 times [2020-11-11 15:12:41,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:41,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119818895] [2020-11-11 15:12:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:41,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119818895] [2020-11-11 15:12:41,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509544327] [2020-11-11 15:12:41,405 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 [2020-11-11 15:12:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:41,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:41,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:41,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:41,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232855211] [2020-11-11 15:12:41,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:41,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:41,513 INFO L87 Difference]: Start difference. First operand 2437 states and 6782 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:42,405 INFO L93 Difference]: Finished difference Result 3226 states and 8600 transitions. [2020-11-11 15:12:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2020-11-11 15:12:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:42,409 INFO L225 Difference]: With dead ends: 3226 [2020-11-11 15:12:42,409 INFO L226 Difference]: Without dead ends: 2815 [2020-11-11 15:12:42,409 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:12:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2020-11-11 15:12:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2387. [2020-11-11 15:12:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.7812238055322718) internal successors, (6636), 2386 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 6636 transitions. [2020-11-11 15:12:42,440 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 6636 transitions. Word has length 91 [2020-11-11 15:12:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:42,440 INFO L481 AbstractCegarLoop]: Abstraction has 2387 states and 6636 transitions. [2020-11-11 15:12:42,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 6636 transitions. [2020-11-11 15:12:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:42,442 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:42,443 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:42,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-11-11 15:12:42,643 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649203, now seen corresponding path program 87 times [2020-11-11 15:12:42,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:42,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020478257] [2020-11-11 15:12:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:42,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020478257] [2020-11-11 15:12:42,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092805868] [2020-11-11 15:12:42,925 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 [2020-11-11 15:12:42,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:12:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:43,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:43,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:43,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:43,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:12:43,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475590395] [2020-11-11 15:12:43,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:12:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:12:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:12:43,067 INFO L87 Difference]: Start difference. First operand 2387 states and 6636 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:43,622 INFO L93 Difference]: Finished difference Result 3505 states and 9320 transitions. [2020-11-11 15:12:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:43,626 INFO L225 Difference]: With dead ends: 3505 [2020-11-11 15:12:43,627 INFO L226 Difference]: Without dead ends: 3171 [2020-11-11 15:12:43,627 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2020-11-11 15:12:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2472. [2020-11-11 15:12:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.754350465398624) internal successors, (6806), 2471 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6806 transitions. [2020-11-11 15:12:43,660 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6806 transitions. Word has length 96 [2020-11-11 15:12:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:43,660 INFO L481 AbstractCegarLoop]: Abstraction has 2472 states and 6806 transitions. [2020-11-11 15:12:43,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6806 transitions. [2020-11-11 15:12:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:43,662 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:43,662 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:43,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:43,863 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1036481211, now seen corresponding path program 88 times [2020-11-11 15:12:43,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:43,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045356234] [2020-11-11 15:12:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:44,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045356234] [2020-11-11 15:12:44,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885829587] [2020-11-11 15:12:44,142 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 [2020-11-11 15:12:44,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:12:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:44,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:44,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:44,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:44,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246021334] [2020-11-11 15:12:44,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:44,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:44,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:44,244 INFO L87 Difference]: Start difference. First operand 2472 states and 6806 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:44,684 INFO L93 Difference]: Finished difference Result 3870 states and 9730 transitions. [2020-11-11 15:12:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:44,689 INFO L225 Difference]: With dead ends: 3870 [2020-11-11 15:12:44,689 INFO L226 Difference]: Without dead ends: 3600 [2020-11-11 15:12:44,689 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:12:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2020-11-11 15:12:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2487. [2020-11-11 15:12:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:44,721 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:44,721 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:44,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:44,724 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:44,724 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:44,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-11-11 15:12:44,925 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499115, now seen corresponding path program 89 times [2020-11-11 15:12:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:44,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297225928] [2020-11-11 15:12:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:45,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297225928] [2020-11-11 15:12:45,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617725193] [2020-11-11 15:12:45,215 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 [2020-11-11 15:12:45,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:12:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:45,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:45,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:45,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:45,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:45,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991649916] [2020-11-11 15:12:45,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:45,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:45,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:45,337 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:45,886 INFO L93 Difference]: Finished difference Result 3755 states and 9500 transitions. [2020-11-11 15:12:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:45,891 INFO L225 Difference]: With dead ends: 3755 [2020-11-11 15:12:45,892 INFO L226 Difference]: Without dead ends: 3485 [2020-11-11 15:12:45,892 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2020-11-11 15:12:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2487. [2020-11-11 15:12:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:45,924 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:45,925 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:45,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:45,927 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:45,927 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:46,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-11 15:12:46,128 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1783027961, now seen corresponding path program 90 times [2020-11-11 15:12:46,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:46,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142455462] [2020-11-11 15:12:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:46,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142455462] [2020-11-11 15:12:46,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423668293] [2020-11-11 15:12:46,375 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 [2020-11-11 15:12:46,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:12:46,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:46,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:46,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:46,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:46,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737588596] [2020-11-11 15:12:46,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:46,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:46,475 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:46,991 INFO L93 Difference]: Finished difference Result 3730 states and 9450 transitions. [2020-11-11 15:12:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:46,996 INFO L225 Difference]: With dead ends: 3730 [2020-11-11 15:12:46,996 INFO L226 Difference]: Without dead ends: 3460 [2020-11-11 15:12:46,997 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:12:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-11-11 15:12:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2487. [2020-11-11 15:12:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:47,033 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:47,033 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:47,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:47,036 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:47,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-11 15:12:47,251 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash -448650775, now seen corresponding path program 91 times [2020-11-11 15:12:47,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:47,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872349000] [2020-11-11 15:12:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:47,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872349000] [2020-11-11 15:12:47,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521980514] [2020-11-11 15:12:47,538 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 [2020-11-11 15:12:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:47,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:47,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:47,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:47,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:47,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:47,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852599275] [2020-11-11 15:12:47,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:47,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:47,646 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:48,284 INFO L93 Difference]: Finished difference Result 3680 states and 9350 transitions. [2020-11-11 15:12:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:48,289 INFO L225 Difference]: With dead ends: 3680 [2020-11-11 15:12:48,289 INFO L226 Difference]: Without dead ends: 3410 [2020-11-11 15:12:48,289 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2020-11-11 15:12:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2487. [2020-11-11 15:12:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:48,322 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:48,322 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:48,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:48,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:48,325 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:48,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-11 15:12:48,527 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -886614857, now seen corresponding path program 92 times [2020-11-11 15:12:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:48,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577046837] [2020-11-11 15:12:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577046837] [2020-11-11 15:12:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477882909] [2020-11-11 15:12:48,778 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 [2020-11-11 15:12:48,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:48,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:48,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:48,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:48,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:48,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543788666] [2020-11-11 15:12:48,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:48,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:48,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:48,875 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:49,451 INFO L93 Difference]: Finished difference Result 3630 states and 9250 transitions. [2020-11-11 15:12:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:49,455 INFO L225 Difference]: With dead ends: 3630 [2020-11-11 15:12:49,455 INFO L226 Difference]: Without dead ends: 3360 [2020-11-11 15:12:49,455 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-11-11 15:12:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2487. [2020-11-11 15:12:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:49,488 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:49,488 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:49,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:49,490 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:49,490 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:49,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:49,691 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1863059879, now seen corresponding path program 93 times [2020-11-11 15:12:49,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:49,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620413015] [2020-11-11 15:12:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:49,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620413015] [2020-11-11 15:12:49,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493545702] [2020-11-11 15:12:49,968 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 [2020-11-11 15:12:50,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:12:50,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:12:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:50,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:50,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:50,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:50,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993502404] [2020-11-11 15:12:50,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:50,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:50,081 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:50,776 INFO L93 Difference]: Finished difference Result 3580 states and 9150 transitions. [2020-11-11 15:12:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:50,784 INFO L225 Difference]: With dead ends: 3580 [2020-11-11 15:12:50,784 INFO L226 Difference]: Without dead ends: 3310 [2020-11-11 15:12:50,784 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1337, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2020-11-11 15:12:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2487. [2020-11-11 15:12:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:50,831 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:50,831 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:50,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:50,834 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:50,834 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:51,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:51,034 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1295894005, now seen corresponding path program 94 times [2020-11-11 15:12:51,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:51,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646769442] [2020-11-11 15:12:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646769442] [2020-11-11 15:12:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057809197] [2020-11-11 15:12:51,269 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 [2020-11-11 15:12:51,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:51,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:12:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:51,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:51,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:51,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:51,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803009974] [2020-11-11 15:12:51,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:51,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:51,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:51,367 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:51,979 INFO L93 Difference]: Finished difference Result 3530 states and 9050 transitions. [2020-11-11 15:12:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:51,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:51,983 INFO L225 Difference]: With dead ends: 3530 [2020-11-11 15:12:51,983 INFO L226 Difference]: Without dead ends: 3260 [2020-11-11 15:12:51,983 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-11-11 15:12:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 2487. [2020-11-11 15:12:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:52,015 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:52,016 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:52,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:52,018 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:52,018 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:52,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-11-11 15:12:52,219 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2124605157, now seen corresponding path program 95 times [2020-11-11 15:12:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:52,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147283053] [2020-11-11 15:12:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:52,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147283053] [2020-11-11 15:12:52,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350783258] [2020-11-11 15:12:52,457 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 [2020-11-11 15:12:52,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:12:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:52,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:52,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:52,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:52,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:52,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335631018] [2020-11-11 15:12:52,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:52,610 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:53,466 INFO L93 Difference]: Finished difference Result 3480 states and 8950 transitions. [2020-11-11 15:12:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:12:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:53,471 INFO L225 Difference]: With dead ends: 3480 [2020-11-11 15:12:53,471 INFO L226 Difference]: Without dead ends: 3210 [2020-11-11 15:12:53,472 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2020-11-11 15:12:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 2487. [2020-11-11 15:12:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:53,503 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:53,503 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:53,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:53,505 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:53,505 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:53,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-11 15:12:53,711 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash 402066611, now seen corresponding path program 96 times [2020-11-11 15:12:53,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:53,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097542288] [2020-11-11 15:12:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:53,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097542288] [2020-11-11 15:12:53,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547025598] [2020-11-11 15:12:53,932 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 [2020-11-11 15:12:53,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:12:53,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:53,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:54,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:54,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:54,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:54,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160252447] [2020-11-11 15:12:54,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:54,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:54,031 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:54,710 INFO L93 Difference]: Finished difference Result 3430 states and 8850 transitions. [2020-11-11 15:12:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:54,715 INFO L225 Difference]: With dead ends: 3430 [2020-11-11 15:12:54,715 INFO L226 Difference]: Without dead ends: 3160 [2020-11-11 15:12:54,716 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:12:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2020-11-11 15:12:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 2487. [2020-11-11 15:12:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:54,747 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:54,747 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:54,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:54,749 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:54,749 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:54,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-11-11 15:12:54,950 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:54,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1137469021, now seen corresponding path program 97 times [2020-11-11 15:12:54,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:54,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600255922] [2020-11-11 15:12:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:55,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600255922] [2020-11-11 15:12:55,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099799583] [2020-11-11 15:12:55,174 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 [2020-11-11 15:12:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:55,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:55,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:55,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:55,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:55,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:55,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782698770] [2020-11-11 15:12:55,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:55,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:55,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:55,281 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:56,227 INFO L93 Difference]: Finished difference Result 3380 states and 8750 transitions. [2020-11-11 15:12:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:12:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:56,232 INFO L225 Difference]: With dead ends: 3380 [2020-11-11 15:12:56,233 INFO L226 Difference]: Without dead ends: 3110 [2020-11-11 15:12:56,233 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:12:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2020-11-11 15:12:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2487. [2020-11-11 15:12:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:56,263 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:56,264 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:56,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:56,267 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:56,267 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:56,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:56,470 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:56,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1800931569, now seen corresponding path program 98 times [2020-11-11 15:12:56,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:56,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565893137] [2020-11-11 15:12:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:56,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565893137] [2020-11-11 15:12:56,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237932105] [2020-11-11 15:12:56,691 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 [2020-11-11 15:12:56,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:56,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:56,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:56,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:56,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:56,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:56,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144687324] [2020-11-11 15:12:56,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:56,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:56,782 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:57,521 INFO L93 Difference]: Finished difference Result 3330 states and 8650 transitions. [2020-11-11 15:12:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:12:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:57,525 INFO L225 Difference]: With dead ends: 3330 [2020-11-11 15:12:57,525 INFO L226 Difference]: Without dead ends: 3060 [2020-11-11 15:12:57,526 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2020-11-11 15:12:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2487. [2020-11-11 15:12:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:12:57,557 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:12:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:57,557 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:12:57,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:12:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:57,559 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:57,559 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:57,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:57,760 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -662502943, now seen corresponding path program 99 times [2020-11-11 15:12:57,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:57,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963125739] [2020-11-11 15:12:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963125739] [2020-11-11 15:12:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342103228] [2020-11-11 15:12:57,984 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 [2020-11-11 15:12:58,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:12:58,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:58,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:12:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:58,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:58,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:58,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086320449] [2020-11-11 15:12:58,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:58,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:58,107 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:59,114 INFO L93 Difference]: Finished difference Result 3709 states and 9684 transitions. [2020-11-11 15:12:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:12:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:12:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:59,119 INFO L225 Difference]: With dead ends: 3709 [2020-11-11 15:12:59,120 INFO L226 Difference]: Without dead ends: 3140 [2020-11-11 15:12:59,120 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=562, Invalid=1888, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:12:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2020-11-11 15:12:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2427. [2020-11-11 15:12:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.758037922506183) internal successors, (6691), 2426 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6691 transitions. [2020-11-11 15:12:59,153 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6691 transitions. Word has length 96 [2020-11-11 15:12:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:59,154 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6691 transitions. [2020-11-11 15:12:59,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6691 transitions. [2020-11-11 15:12:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:59,156 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:59,156 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:59,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-11 15:12:59,357 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash -33711441, now seen corresponding path program 100 times [2020-11-11 15:12:59,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:59,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341712410] [2020-11-11 15:12:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:59,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341712410] [2020-11-11 15:12:59,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208186011] [2020-11-11 15:12:59,547 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 [2020-11-11 15:12:59,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:59,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:59,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:12:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:59,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:59,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:59,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:59,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775059512] [2020-11-11 15:12:59,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:59,649 INFO L87 Difference]: Start difference. First operand 2427 states and 6691 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:00,462 INFO L93 Difference]: Finished difference Result 4352 states and 11644 transitions. [2020-11-11 15:13:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2020-11-11 15:13:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:00,468 INFO L225 Difference]: With dead ends: 4352 [2020-11-11 15:13:00,468 INFO L226 Difference]: Without dead ends: 4082 [2020-11-11 15:13:00,468 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2020-11-11 15:13:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 2552. [2020-11-11 15:13:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.776166209329675) internal successors, (7082), 2551 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7082 transitions. [2020-11-11 15:13:00,526 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7082 transitions. Word has length 96 [2020-11-11 15:13:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:00,526 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 7082 transitions. [2020-11-11 15:13:00,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7082 transitions. [2020-11-11 15:13:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:00,529 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:00,529 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:00,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-11-11 15:13:00,743 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:00,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1677496513, now seen corresponding path program 101 times [2020-11-11 15:13:00,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:00,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610357393] [2020-11-11 15:13:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:00,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610357393] [2020-11-11 15:13:00,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479995807] [2020-11-11 15:13:00,962 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 [2020-11-11 15:13:01,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:01,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:01,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:01,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:01,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:01,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:01,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756669536] [2020-11-11 15:13:01,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:01,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:01,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:01,091 INFO L87 Difference]: Start difference. First operand 2552 states and 7082 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:02,171 INFO L93 Difference]: Finished difference Result 3391 states and 9000 transitions. [2020-11-11 15:13:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:13:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 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 96 [2020-11-11 15:13:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:02,176 INFO L225 Difference]: With dead ends: 3391 [2020-11-11 15:13:02,176 INFO L226 Difference]: Without dead ends: 2980 [2020-11-11 15:13:02,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:13:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2020-11-11 15:13:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1902. [2020-11-11 15:13:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.6964755391899002) internal successors, (5126), 1901 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5126 transitions. [2020-11-11 15:13:02,204 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5126 transitions. Word has length 96 [2020-11-11 15:13:02,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:02,205 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 5126 transitions. [2020-11-11 15:13:02,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5126 transitions. [2020-11-11 15:13:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:02,206 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:02,206 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:02,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:02,407 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 756357588, now seen corresponding path program 102 times [2020-11-11 15:13:02,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:02,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817666312] [2020-11-11 15:13:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:02,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817666312] [2020-11-11 15:13:02,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108493917] [2020-11-11 15:13:02,705 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 [2020-11-11 15:13:02,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:02,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:02,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:02,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:02,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:02,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208020315] [2020-11-11 15:13:02,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:02,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:02,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:02,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:02,836 INFO L87 Difference]: Start difference. First operand 1902 states and 5126 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:03,395 INFO L93 Difference]: Finished difference Result 2995 states and 7490 transitions. [2020-11-11 15:13:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:03,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:03,401 INFO L225 Difference]: With dead ends: 2995 [2020-11-11 15:13:03,401 INFO L226 Difference]: Without dead ends: 2725 [2020-11-11 15:13:03,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2020-11-11 15:13:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1952. [2020-11-11 15:13:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 2.7042542286007176) internal successors, (5276), 1951 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5276 transitions. [2020-11-11 15:13:03,429 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5276 transitions. Word has length 101 [2020-11-11 15:13:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:03,430 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 5276 transitions. [2020-11-11 15:13:03,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5276 transitions. [2020-11-11 15:13:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:03,431 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:03,431 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:03,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-11 15:13:03,632 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1392375492, now seen corresponding path program 103 times [2020-11-11 15:13:03,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:03,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532499132] [2020-11-11 15:13:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:03,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532499132] [2020-11-11 15:13:03,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700037012] [2020-11-11 15:13:03,937 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 [2020-11-11 15:13:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:04,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:04,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:04,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:04,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:04,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32777744] [2020-11-11 15:13:04,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:04,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:04,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:04,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:04,103 INFO L87 Difference]: Start difference. First operand 1952 states and 5276 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:04,733 INFO L93 Difference]: Finished difference Result 3340 states and 8230 transitions. [2020-11-11 15:13:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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 101 [2020-11-11 15:13:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:04,737 INFO L225 Difference]: With dead ends: 3340 [2020-11-11 15:13:04,737 INFO L226 Difference]: Without dead ends: 3070 [2020-11-11 15:13:04,737 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2020-11-11 15:13:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2002. [2020-11-11 15:13:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 2.7116441779110443) internal successors, (5426), 2001 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5426 transitions. [2020-11-11 15:13:04,765 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5426 transitions. Word has length 101 [2020-11-11 15:13:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:04,765 INFO L481 AbstractCegarLoop]: Abstraction has 2002 states and 5426 transitions. [2020-11-11 15:13:04,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5426 transitions. [2020-11-11 15:13:04,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:04,766 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:04,767 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:04,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:04,967 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1502904338, now seen corresponding path program 104 times [2020-11-11 15:13:04,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:04,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390042516] [2020-11-11 15:13:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390042516] [2020-11-11 15:13:05,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126892531] [2020-11-11 15:13:05,255 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 [2020-11-11 15:13:05,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:05,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:05,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:05,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7840663] [2020-11-11 15:13:05,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:05,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:05,397 INFO L87 Difference]: Start difference. First operand 2002 states and 5426 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:05,982 INFO L93 Difference]: Finished difference Result 3345 states and 8290 transitions. [2020-11-11 15:13:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:05,987 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:05,987 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:05,988 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2052. [2020-11-11 15:13:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7186738176499268) internal successors, (5576), 2051 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5576 transitions. [2020-11-11 15:13:06,015 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5576 transitions. Word has length 101 [2020-11-11 15:13:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:06,016 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5576 transitions. [2020-11-11 15:13:06,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5576 transitions. [2020-11-11 15:13:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:06,017 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:06,017 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:06,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-11-11 15:13:06,218 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -728774398, now seen corresponding path program 105 times [2020-11-11 15:13:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:06,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017363482] [2020-11-11 15:13:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017363482] [2020-11-11 15:13:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928099078] [2020-11-11 15:13:06,504 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:06,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:13:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:13:06,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:06,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:06,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:06,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:06,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684753615] [2020-11-11 15:13:06,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:06,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:06,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:06,643 INFO L87 Difference]: Start difference. First operand 2052 states and 5576 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:07,367 INFO L93 Difference]: Finished difference Result 3345 states and 8340 transitions. [2020-11-11 15:13:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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 101 [2020-11-11 15:13:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:07,372 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:07,372 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:07,373 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=484, Invalid=1586, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2102. [2020-11-11 15:13:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.7253688719657307) internal successors, (5726), 2101 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5726 transitions. [2020-11-11 15:13:07,404 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5726 transitions. Word has length 101 [2020-11-11 15:13:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:07,405 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5726 transitions. [2020-11-11 15:13:07,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5726 transitions. [2020-11-11 15:13:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:07,406 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:07,406 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:07,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:07,607 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1166738480, now seen corresponding path program 106 times [2020-11-11 15:13:07,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:07,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060405570] [2020-11-11 15:13:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060405570] [2020-11-11 15:13:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023345085] [2020-11-11 15:13:07,888 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:07,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:07,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:08,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:08,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601301353] [2020-11-11 15:13:08,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:08,007 INFO L87 Difference]: Start difference. First operand 2102 states and 5726 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:08,690 INFO L93 Difference]: Finished difference Result 3345 states and 8390 transitions. [2020-11-11 15:13:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:08,694 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:08,695 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:08,695 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2152. [2020-11-11 15:13:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.7317526731752673) internal successors, (5876), 2151 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5876 transitions. [2020-11-11 15:13:08,724 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5876 transitions. Word has length 101 [2020-11-11 15:13:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:08,724 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5876 transitions. [2020-11-11 15:13:08,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5876 transitions. [2020-11-11 15:13:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:08,726 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:08,726 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:08,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-11 15:13:08,927 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1582936256, now seen corresponding path program 107 times [2020-11-11 15:13:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:08,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982992406] [2020-11-11 15:13:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:09,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982992406] [2020-11-11 15:13:09,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300603092] [2020-11-11 15:13:09,208 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:09,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:09,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:09,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:09,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:09,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597838288] [2020-11-11 15:13:09,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:09,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:09,346 INFO L87 Difference]: Start difference. First operand 2152 states and 5876 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:10,185 INFO L93 Difference]: Finished difference Result 3345 states and 8440 transitions. [2020-11-11 15:13:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:10,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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 101 [2020-11-11 15:13:10,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:10,189 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:10,189 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:10,189 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2202. [2020-11-11 15:13:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.737846433439346) internal successors, (6026), 2201 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6026 transitions. [2020-11-11 15:13:10,221 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6026 transitions. Word has length 101 [2020-11-11 15:13:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:10,221 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 6026 transitions. [2020-11-11 15:13:10,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6026 transitions. [2020-11-11 15:13:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:10,223 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:10,223 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:10,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:10,424 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:10,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1015770382, now seen corresponding path program 108 times [2020-11-11 15:13:10,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:10,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906931668] [2020-11-11 15:13:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:10,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906931668] [2020-11-11 15:13:10,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655120809] [2020-11-11 15:13:10,678 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:10,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:10,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:10,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:10,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053292890] [2020-11-11 15:13:10,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:10,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:10,802 INFO L87 Difference]: Start difference. First operand 2202 states and 6026 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:11,530 INFO L93 Difference]: Finished difference Result 3345 states and 8490 transitions. [2020-11-11 15:13:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:11,535 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:11,535 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:11,536 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2252. [2020-11-11 15:13:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7436694802310084) internal successors, (6176), 2251 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6176 transitions. [2020-11-11 15:13:11,567 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6176 transitions. Word has length 101 [2020-11-11 15:13:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:11,567 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6176 transitions. [2020-11-11 15:13:11,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6176 transitions. [2020-11-11 15:13:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:11,569 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:11,569 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:11,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:11,770 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:11,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1844481534, now seen corresponding path program 109 times [2020-11-11 15:13:11,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:11,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654493499] [2020-11-11 15:13:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654493499] [2020-11-11 15:13:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371654214] [2020-11-11 15:13:12,035 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:12,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:12,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:12,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:12,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198835508] [2020-11-11 15:13:12,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:12,172 INFO L87 Difference]: Start difference. First operand 2252 states and 6176 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:13,109 INFO L93 Difference]: Finished difference Result 3345 states and 8540 transitions. [2020-11-11 15:13:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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 101 [2020-11-11 15:13:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:13,114 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:13,114 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:13,114 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:13:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2302. [2020-11-11 15:13:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.7492394611038677) internal successors, (6326), 2301 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6326 transitions. [2020-11-11 15:13:13,146 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6326 transitions. Word has length 101 [2020-11-11 15:13:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:13,146 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6326 transitions. [2020-11-11 15:13:13,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6326 transitions. [2020-11-11 15:13:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:13,148 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:13,148 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:13,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:13,349 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:13,350 INFO L82 PathProgramCache]: Analyzing trace with hash 121942988, now seen corresponding path program 110 times [2020-11-11 15:13:13,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:13,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350246104] [2020-11-11 15:13:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:13,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350246104] [2020-11-11 15:13:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115542700] [2020-11-11 15:13:13,600 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:13,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:13,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:13,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:13,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:13,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:13,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986991759] [2020-11-11 15:13:13,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:13,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:13,741 INFO L87 Difference]: Start difference. First operand 2302 states and 6326 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:14,533 INFO L93 Difference]: Finished difference Result 3345 states and 8590 transitions. [2020-11-11 15:13:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:14,538 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:14,538 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:14,538 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:13:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2352. [2020-11-11 15:13:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.754572522330923) internal successors, (6476), 2351 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6476 transitions. [2020-11-11 15:13:14,571 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6476 transitions. Word has length 101 [2020-11-11 15:13:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:14,571 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6476 transitions. [2020-11-11 15:13:14,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6476 transitions. [2020-11-11 15:13:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:14,573 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:14,573 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:14,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-11-11 15:13:14,774 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1417592644, now seen corresponding path program 111 times [2020-11-11 15:13:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:14,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267877522] [2020-11-11 15:13:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:15,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267877522] [2020-11-11 15:13:15,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551524743] [2020-11-11 15:13:15,027 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:15,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:13:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:13:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:15,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:15,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:15,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:15,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751833302] [2020-11-11 15:13:15,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:15,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:15,190 INFO L87 Difference]: Start difference. First operand 2352 states and 6476 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:16,173 INFO L93 Difference]: Finished difference Result 3345 states and 8640 transitions. [2020-11-11 15:13:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:13:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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 101 [2020-11-11 15:13:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:16,178 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:16,178 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:16,179 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=628, Invalid=2024, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:13:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2402. [2020-11-11 15:13:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7596834652228237) internal successors, (6626), 2401 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6626 transitions. [2020-11-11 15:13:16,211 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6626 transitions. Word has length 101 [2020-11-11 15:13:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:16,211 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6626 transitions. [2020-11-11 15:13:16,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6626 transitions. [2020-11-11 15:13:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:16,213 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:16,213 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:16,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:16,414 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1520807946, now seen corresponding path program 112 times [2020-11-11 15:13:16,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:16,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052447483] [2020-11-11 15:13:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:16,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052447483] [2020-11-11 15:13:16,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232396719] [2020-11-11 15:13:16,658 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:16,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:16,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:16,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:16,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:16,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:16,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748681608] [2020-11-11 15:13:16,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:16,778 INFO L87 Difference]: Start difference. First operand 2402 states and 6626 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:17,630 INFO L93 Difference]: Finished difference Result 3345 states and 8690 transitions. [2020-11-11 15:13:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:13:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:17,634 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:17,634 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:17,635 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:13:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2452. [2020-11-11 15:13:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7645858833129333) internal successors, (6776), 2451 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6776 transitions. [2020-11-11 15:13:17,671 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6776 transitions. Word has length 101 [2020-11-11 15:13:17,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:17,671 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6776 transitions. [2020-11-11 15:13:17,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6776 transitions. [2020-11-11 15:13:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:17,673 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:17,673 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:17,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-11 15:13:17,874 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash -942626566, now seen corresponding path program 113 times [2020-11-11 15:13:17,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:17,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340452800] [2020-11-11 15:13:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340452800] [2020-11-11 15:13:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056633252] [2020-11-11 15:13:18,132 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:18,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:18,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:18,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:18,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:18,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:18,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:18,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299379518] [2020-11-11 15:13:18,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:18,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:18,297 INFO L87 Difference]: Start difference. First operand 2452 states and 6776 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:19,428 INFO L93 Difference]: Finished difference Result 3390 states and 8860 transitions. [2020-11-11 15:13:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:13:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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 101 [2020-11-11 15:13:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:19,433 INFO L225 Difference]: With dead ends: 3390 [2020-11-11 15:13:19,433 INFO L226 Difference]: Without dead ends: 3120 [2020-11-11 15:13:19,434 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:13:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2020-11-11 15:13:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2502. [2020-11-11 15:13:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7752898840463813) internal successors, (6941), 2501 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6941 transitions. [2020-11-11 15:13:19,470 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6941 transitions. Word has length 101 [2020-11-11 15:13:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:19,470 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6941 transitions. [2020-11-11 15:13:19,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 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) [2020-11-11 15:13:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6941 transitions. [2020-11-11 15:13:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:19,472 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:19,473 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:19,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-11 15:13:19,674 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash -313835064, now seen corresponding path program 114 times [2020-11-11 15:13:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262937222] [2020-11-11 15:13:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262937222] [2020-11-11 15:13:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982514744] [2020-11-11 15:13:19,890 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:19,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:19,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:20,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:20,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:20,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027902832] [2020-11-11 15:13:20,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:20,016 INFO L87 Difference]: Start difference. First operand 2502 states and 6941 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:20,939 INFO L93 Difference]: Finished difference Result 4452 states and 11944 transitions. [2020-11-11 15:13:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:13:20,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:20,944 INFO L225 Difference]: With dead ends: 4452 [2020-11-11 15:13:20,944 INFO L226 Difference]: Without dead ends: 4182 [2020-11-11 15:13:20,945 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:13:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-11-11 15:13:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 2627. [2020-11-11 15:13:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.792079207920792) internal successors, (7332), 2626 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7332 transitions. [2020-11-11 15:13:21,008 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7332 transitions. Word has length 101 [2020-11-11 15:13:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:21,008 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7332 transitions. [2020-11-11 15:13:21,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7332 transitions. [2020-11-11 15:13:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:21,011 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:21,011 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:21,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:21,216 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:21,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1397372890, now seen corresponding path program 115 times [2020-11-11 15:13:21,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:21,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535587680] [2020-11-11 15:13:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:21,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535587680] [2020-11-11 15:13:21,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871112657] [2020-11-11 15:13:21,465 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:21,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:21,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:21,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:21,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:21,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:21,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774859808] [2020-11-11 15:13:21,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:21,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:21,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:21,577 INFO L87 Difference]: Start difference. First operand 2627 states and 7332 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:22,711 INFO L93 Difference]: Finished difference Result 3466 states and 9250 transitions. [2020-11-11 15:13:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:13:22,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2020-11-11 15:13:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:22,716 INFO L225 Difference]: With dead ends: 3466 [2020-11-11 15:13:22,716 INFO L226 Difference]: Without dead ends: 3055 [2020-11-11 15:13:22,717 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:13:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2020-11-11 15:13:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1841. [2020-11-11 15:13:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 2.7) internal successors, (4968), 1840 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 4968 transitions. [2020-11-11 15:13:22,745 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 4968 transitions. Word has length 101 [2020-11-11 15:13:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:22,745 INFO L481 AbstractCegarLoop]: Abstraction has 1841 states and 4968 transitions. [2020-11-11 15:13:22,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 4968 transitions. [2020-11-11 15:13:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:22,747 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:22,747 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:22,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:22,949 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1563127458, now seen corresponding path program 116 times [2020-11-11 15:13:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:22,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357972315] [2020-11-11 15:13:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:23,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357972315] [2020-11-11 15:13:23,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605248869] [2020-11-11 15:13:23,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:23,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:23,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:23,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:23,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:23,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:23,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:23,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:23,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2020-11-11 15:13:23,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886943544] [2020-11-11 15:13:23,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:13:23,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:13:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:13:23,482 INFO L87 Difference]: Start difference. First operand 1841 states and 4968 transitions. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:24,160 INFO L93 Difference]: Finished difference Result 3009 states and 7752 transitions. [2020-11-11 15:13:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:24,163 INFO L225 Difference]: With dead ends: 3009 [2020-11-11 15:13:24,163 INFO L226 Difference]: Without dead ends: 2675 [2020-11-11 15:13:24,164 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-11-11 15:13:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1926. [2020-11-11 15:13:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 2.669090909090909) internal successors, (5138), 1925 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 5138 transitions. [2020-11-11 15:13:24,190 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 5138 transitions. Word has length 106 [2020-11-11 15:13:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:24,191 INFO L481 AbstractCegarLoop]: Abstraction has 1926 states and 5138 transitions. [2020-11-11 15:13:24,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 5138 transitions. [2020-11-11 15:13:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:24,193 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:24,193 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:24,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-11-11 15:13:24,394 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:24,394 INFO L82 PathProgramCache]: Analyzing trace with hash 272999308, now seen corresponding path program 117 times [2020-11-11 15:13:24,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:24,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782775937] [2020-11-11 15:13:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:24,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782775937] [2020-11-11 15:13:24,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121437304] [2020-11-11 15:13:24,728 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:24,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:13:24,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:24,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:24,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:24,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:24,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069784634] [2020-11-11 15:13:24,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:24,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:24,848 INFO L87 Difference]: Start difference. First operand 1926 states and 5138 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:25,380 INFO L93 Difference]: Finished difference Result 3560 states and 8620 transitions. [2020-11-11 15:13:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:25,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:25,384 INFO L225 Difference]: With dead ends: 3560 [2020-11-11 15:13:25,384 INFO L226 Difference]: Without dead ends: 3290 [2020-11-11 15:13:25,385 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2020-11-11 15:13:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2027. [2020-11-11 15:13:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 2.678183613030602) internal successors, (5426), 2026 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 5426 transitions. [2020-11-11 15:13:25,410 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 5426 transitions. Word has length 106 [2020-11-11 15:13:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:25,410 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 5426 transitions. [2020-11-11 15:13:25,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 5426 transitions. [2020-11-11 15:13:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:25,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:25,412 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:25,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:25,613 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash 338891900, now seen corresponding path program 118 times [2020-11-11 15:13:25,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:25,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767277446] [2020-11-11 15:13:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:25,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767277446] [2020-11-11 15:13:25,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661287804] [2020-11-11 15:13:25,961 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:26,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:13:26,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:26,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:26,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:26,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:26,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:26,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442223989] [2020-11-11 15:13:26,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:26,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:26,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:26,105 INFO L87 Difference]: Start difference. First operand 2027 states and 5426 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:26,771 INFO L93 Difference]: Finished difference Result 3495 states and 8540 transitions. [2020-11-11 15:13:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:26,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:26,775 INFO L225 Difference]: With dead ends: 3495 [2020-11-11 15:13:26,775 INFO L226 Difference]: Without dead ends: 3225 [2020-11-11 15:13:26,776 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:13:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-11-11 15:13:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2077. [2020-11-11 15:13:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 2.6859344894026975) internal successors, (5576), 2076 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 5576 transitions. [2020-11-11 15:13:26,803 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 5576 transitions. Word has length 106 [2020-11-11 15:13:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:26,804 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 5576 transitions. [2020-11-11 15:13:26,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 5576 transitions. [2020-11-11 15:13:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:26,805 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:26,805 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:27,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:27,006 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash 413193290, now seen corresponding path program 119 times [2020-11-11 15:13:27,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:27,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600813912] [2020-11-11 15:13:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:27,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600813912] [2020-11-11 15:13:27,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899725398] [2020-11-11 15:13:27,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:27,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:13:27,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:27,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:27,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:27,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:27,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472935477] [2020-11-11 15:13:27,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:27,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:27,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:27,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:27,455 INFO L87 Difference]: Start difference. First operand 2077 states and 5576 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:28,062 INFO L93 Difference]: Finished difference Result 3520 states and 8640 transitions. [2020-11-11 15:13:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:28,067 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:28,067 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:28,067 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:13:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2127. [2020-11-11 15:13:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 2.6933207902163687) internal successors, (5726), 2126 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 5726 transitions. [2020-11-11 15:13:28,097 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 5726 transitions. Word has length 106 [2020-11-11 15:13:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:28,097 INFO L481 AbstractCegarLoop]: Abstraction has 2127 states and 5726 transitions. [2020-11-11 15:13:28,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 5726 transitions. [2020-11-11 15:13:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:28,099 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:28,099 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:28,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:28,300 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1049211194, now seen corresponding path program 120 times [2020-11-11 15:13:28,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:28,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998115117] [2020-11-11 15:13:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:28,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998115117] [2020-11-11 15:13:28,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629082370] [2020-11-11 15:13:28,635 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:28,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:13:28,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:28,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:28,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:28,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:28,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:28,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:28,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:28,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880954981] [2020-11-11 15:13:28,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:28,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:28,779 INFO L87 Difference]: Start difference. First operand 2127 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:29,564 INFO L93 Difference]: Finished difference Result 3520 states and 8690 transitions. [2020-11-11 15:13:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:29,568 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:29,569 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:29,569 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2177. [2020-11-11 15:13:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.7003676470588234) internal successors, (5876), 2176 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 5876 transitions. [2020-11-11 15:13:29,598 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 5876 transitions. Word has length 106 [2020-11-11 15:13:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:29,598 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 5876 transitions. [2020-11-11 15:13:29,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 5876 transitions. [2020-11-11 15:13:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:29,600 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:29,600 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:29,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-11-11 15:13:29,801 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1159740040, now seen corresponding path program 121 times [2020-11-11 15:13:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:29,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990661156] [2020-11-11 15:13:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:30,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990661156] [2020-11-11 15:13:30,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196898302] [2020-11-11 15:13:30,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:30,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:30,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:30,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:30,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604327965] [2020-11-11 15:13:30,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:30,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:30,222 INFO L87 Difference]: Start difference. First operand 2177 states and 5876 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:30,922 INFO L93 Difference]: Finished difference Result 3520 states and 8740 transitions. [2020-11-11 15:13:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:30,927 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:30,927 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:30,927 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:13:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2227. [2020-11-11 15:13:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 2.707097933513028) internal successors, (6026), 2226 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 6026 transitions. [2020-11-11 15:13:30,960 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 6026 transitions. Word has length 106 [2020-11-11 15:13:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:30,960 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 6026 transitions. [2020-11-11 15:13:30,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 6026 transitions. [2020-11-11 15:13:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:30,962 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:30,962 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:31,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-11-11 15:13:31,163 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1071938696, now seen corresponding path program 122 times [2020-11-11 15:13:31,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:31,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429484789] [2020-11-11 15:13:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:31,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429484789] [2020-11-11 15:13:31,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305560834] [2020-11-11 15:13:31,477 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:31,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:31,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:31,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:31,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:31,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:31,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:31,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:31,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875548288] [2020-11-11 15:13:31,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:31,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:31,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:31,623 INFO L87 Difference]: Start difference. First operand 2227 states and 6026 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:32,509 INFO L93 Difference]: Finished difference Result 3520 states and 8790 transitions. [2020-11-11 15:13:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:32,513 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:32,514 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:32,514 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:13:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2277. [2020-11-11 15:13:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 2.7135325131810193) internal successors, (6176), 2276 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 6176 transitions. [2020-11-11 15:13:32,545 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 6176 transitions. Word has length 106 [2020-11-11 15:13:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:32,545 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 6176 transitions. [2020-11-11 15:13:32,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 6176 transitions. [2020-11-11 15:13:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:32,548 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:32,548 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:32,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-11 15:13:32,763 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1509902778, now seen corresponding path program 123 times [2020-11-11 15:13:32,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:32,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893419821] [2020-11-11 15:13:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:33,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893419821] [2020-11-11 15:13:33,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597461642] [2020-11-11 15:13:33,051 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:33,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:13:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:13:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:33,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:33,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:33,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:33,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009197629] [2020-11-11 15:13:33,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:33,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:33,175 INFO L87 Difference]: Start difference. First operand 2277 states and 6176 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:33,958 INFO L93 Difference]: Finished difference Result 3520 states and 8840 transitions. [2020-11-11 15:13:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:33,964 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:33,964 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:33,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2327. [2020-11-11 15:13:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.719690455717971) internal successors, (6326), 2326 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6326 transitions. [2020-11-11 15:13:33,994 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6326 transitions. Word has length 106 [2020-11-11 15:13:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:33,994 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6326 transitions. [2020-11-11 15:13:33,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6326 transitions. [2020-11-11 15:13:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:33,996 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:33,996 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:34,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-11-11 15:13:34,197 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1239771958, now seen corresponding path program 124 times [2020-11-11 15:13:34,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:34,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004385811] [2020-11-11 15:13:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:34,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004385811] [2020-11-11 15:13:34,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412397280] [2020-11-11 15:13:34,509 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:34,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:13:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:34,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:34,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:34,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:34,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:34,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682780724] [2020-11-11 15:13:34,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:34,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:34,655 INFO L87 Difference]: Start difference. First operand 2327 states and 6326 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:35,696 INFO L93 Difference]: Finished difference Result 3520 states and 8890 transitions. [2020-11-11 15:13:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:35,701 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:35,701 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:35,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:13:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2377. [2020-11-11 15:13:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.725589225589226) internal successors, (6476), 2376 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6476 transitions. [2020-11-11 15:13:35,732 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6476 transitions. Word has length 106 [2020-11-11 15:13:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:35,733 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6476 transitions. [2020-11-11 15:13:35,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6476 transitions. [2020-11-11 15:13:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:35,734 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:35,734 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:35,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-11-11 15:13:35,935 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash 672606084, now seen corresponding path program 125 times [2020-11-11 15:13:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:35,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240108686] [2020-11-11 15:13:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:36,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240108686] [2020-11-11 15:13:36,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116856339] [2020-11-11 15:13:36,195 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:36,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:13:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:36,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:36,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470175054] [2020-11-11 15:13:36,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:36,314 INFO L87 Difference]: Start difference. First operand 2377 states and 6476 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:37,166 INFO L93 Difference]: Finished difference Result 3520 states and 8940 transitions. [2020-11-11 15:13:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:37,171 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:37,171 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:37,171 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:13:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2427. [2020-11-11 15:13:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.731244847485573) internal successors, (6626), 2426 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6626 transitions. [2020-11-11 15:13:37,205 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6626 transitions. Word has length 106 [2020-11-11 15:13:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:37,206 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6626 transitions. [2020-11-11 15:13:37,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6626 transitions. [2020-11-11 15:13:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:37,208 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:37,208 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:37,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:37,409 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1501317236, now seen corresponding path program 126 times [2020-11-11 15:13:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:37,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52654131] [2020-11-11 15:13:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:37,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52654131] [2020-11-11 15:13:37,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540905136] [2020-11-11 15:13:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:37,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:13:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:37,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:37,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:37,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:37,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:37,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633098893] [2020-11-11 15:13:37,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:37,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:37,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:37,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:37,866 INFO L87 Difference]: Start difference. First operand 2427 states and 6626 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:38,994 INFO L93 Difference]: Finished difference Result 3520 states and 8990 transitions. [2020-11-11 15:13:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:13:38,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:38,999 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:38,999 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:39,000 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:13:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2477. [2020-11-11 15:13:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.736672051696284) internal successors, (6776), 2476 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 6776 transitions. [2020-11-11 15:13:39,034 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 6776 transitions. Word has length 106 [2020-11-11 15:13:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:39,034 INFO L481 AbstractCegarLoop]: Abstraction has 2477 states and 6776 transitions. [2020-11-11 15:13:39,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 6776 transitions. [2020-11-11 15:13:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:39,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:39,036 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:39,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-11-11 15:13:39,238 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -221221310, now seen corresponding path program 127 times [2020-11-11 15:13:39,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:39,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238166725] [2020-11-11 15:13:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:39,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238166725] [2020-11-11 15:13:39,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654278067] [2020-11-11 15:13:39,521 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:39,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:39,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964054052] [2020-11-11 15:13:39,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:39,634 INFO L87 Difference]: Start difference. First operand 2477 states and 6776 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:40,567 INFO L93 Difference]: Finished difference Result 3520 states and 9040 transitions. [2020-11-11 15:13:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:40,572 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:40,572 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:40,573 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:13:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2527. [2020-11-11 15:13:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.741884402216944) internal successors, (6926), 2526 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6926 transitions. [2020-11-11 15:13:40,608 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6926 transitions. Word has length 106 [2020-11-11 15:13:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:40,608 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6926 transitions. [2020-11-11 15:13:40,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6926 transitions. [2020-11-11 15:13:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:40,610 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:40,610 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:40,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-11 15:13:40,811 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1760756942, now seen corresponding path program 128 times [2020-11-11 15:13:40,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:40,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653541125] [2020-11-11 15:13:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:41,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653541125] [2020-11-11 15:13:41,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438864566] [2020-11-11 15:13:41,140 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:41,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:41,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:41,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:41,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:41,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:41,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:41,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324334746] [2020-11-11 15:13:41,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:41,277 INFO L87 Difference]: Start difference. First operand 2527 states and 6926 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:42,493 INFO L93 Difference]: Finished difference Result 3520 states and 9090 transitions. [2020-11-11 15:13:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:13:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:42,499 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:42,499 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:42,499 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:13:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2577. [2020-11-11 15:13:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 2.7468944099378882) internal successors, (7076), 2576 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 7076 transitions. [2020-11-11 15:13:42,536 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 7076 transitions. Word has length 106 [2020-11-11 15:13:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:42,536 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 7076 transitions. [2020-11-11 15:13:42,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 7076 transitions. [2020-11-11 15:13:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:42,538 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:42,538 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:42,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:42,739 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:42,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1177643648, now seen corresponding path program 129 times [2020-11-11 15:13:42,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:42,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356822956] [2020-11-11 15:13:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:43,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356822956] [2020-11-11 15:13:43,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360102949] [2020-11-11 15:13:43,010 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:43,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:13:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:13:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:43,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:43,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:43,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:43,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340108268] [2020-11-11 15:13:43,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:43,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:43,130 INFO L87 Difference]: Start difference. First operand 2577 states and 7076 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:44,114 INFO L93 Difference]: Finished difference Result 3520 states and 9140 transitions. [2020-11-11 15:13:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:13:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:44,120 INFO L225 Difference]: With dead ends: 3520 [2020-11-11 15:13:44,120 INFO L226 Difference]: Without dead ends: 3250 [2020-11-11 15:13:44,120 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:13:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-11-11 15:13:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2627. [2020-11-11 15:13:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.7517136329017515) internal successors, (7226), 2626 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7226 transitions. [2020-11-11 15:13:44,155 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7226 transitions. Word has length 106 [2020-11-11 15:13:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:44,155 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7226 transitions. [2020-11-11 15:13:44,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7226 transitions. [2020-11-11 15:13:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:44,157 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:44,157 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:44,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:44,358 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1285790864, now seen corresponding path program 130 times [2020-11-11 15:13:44,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:44,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396812397] [2020-11-11 15:13:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:44,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396812397] [2020-11-11 15:13:44,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649396300] [2020-11-11 15:13:44,641 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:44,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:44,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:44,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:13:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:44,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:44,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:44,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:44,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:13:44,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768152294] [2020-11-11 15:13:44,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:44,798 INFO L87 Difference]: Start difference. First operand 2627 states and 7226 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:46,101 INFO L93 Difference]: Finished difference Result 3565 states and 9310 transitions. [2020-11-11 15:13:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:13:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:46,111 INFO L225 Difference]: With dead ends: 3565 [2020-11-11 15:13:46,111 INFO L226 Difference]: Without dead ends: 3295 [2020-11-11 15:13:46,111 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:13:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2020-11-11 15:13:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2677. [2020-11-11 15:13:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.7619581464872947) internal successors, (7391), 2676 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7391 transitions. [2020-11-11 15:13:46,149 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7391 transitions. Word has length 106 [2020-11-11 15:13:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:46,149 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7391 transitions. [2020-11-11 15:13:46,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7391 transitions. [2020-11-11 15:13:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:46,152 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:46,152 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:46,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:46,353 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash -656999362, now seen corresponding path program 131 times [2020-11-11 15:13:46,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:46,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252795228] [2020-11-11 15:13:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:46,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252795228] [2020-11-11 15:13:46,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099701654] [2020-11-11 15:13:46,619 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:46,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:13:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:46,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:46,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:46,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100830534] [2020-11-11 15:13:46,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:46,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:46,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:46,771 INFO L87 Difference]: Start difference. First operand 2677 states and 7391 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:47,829 INFO L93 Difference]: Finished difference Result 4652 states and 12444 transitions. [2020-11-11 15:13:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:13:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:47,836 INFO L225 Difference]: With dead ends: 4652 [2020-11-11 15:13:47,836 INFO L226 Difference]: Without dead ends: 4382 [2020-11-11 15:13:47,836 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:13:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2020-11-11 15:13:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 2802. [2020-11-11 15:13:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.7782934666190644) internal successors, (7782), 2801 states have internal predecessors, (7782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7782 transitions. [2020-11-11 15:13:47,877 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7782 transitions. Word has length 106 [2020-11-11 15:13:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:47,878 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7782 transitions. [2020-11-11 15:13:47,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7782 transitions. [2020-11-11 15:13:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:47,880 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:47,880 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:48,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:48,081 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1054208592, now seen corresponding path program 132 times [2020-11-11 15:13:48,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:48,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878442600] [2020-11-11 15:13:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:48,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878442600] [2020-11-11 15:13:48,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589583055] [2020-11-11 15:13:48,350 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:48,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:13:48,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:48,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:48,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:48,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:48,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:48,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511083670] [2020-11-11 15:13:48,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:48,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:48,483 INFO L87 Difference]: Start difference. First operand 2802 states and 7782 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:49,743 INFO L93 Difference]: Finished difference Result 3691 states and 9800 transitions. [2020-11-11 15:13:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:13:49,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 106 [2020-11-11 15:13:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:49,749 INFO L225 Difference]: With dead ends: 3691 [2020-11-11 15:13:49,749 INFO L226 Difference]: Without dead ends: 3280 [2020-11-11 15:13:49,750 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=783, Invalid=2297, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:13:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2020-11-11 15:13:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2052. [2020-11-11 15:13:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.6942954656265234) internal successors, (5526), 2051 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5526 transitions. [2020-11-11 15:13:49,805 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5526 transitions. Word has length 106 [2020-11-11 15:13:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:49,806 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5526 transitions. [2020-11-11 15:13:49,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5526 transitions. [2020-11-11 15:13:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:49,807 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:49,807 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:50,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-11-11 15:13:50,008 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:50,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1102839963, now seen corresponding path program 133 times [2020-11-11 15:13:50,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:50,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145277919] [2020-11-11 15:13:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:50,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145277919] [2020-11-11 15:13:50,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488381503] [2020-11-11 15:13:50,363 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:50,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:50,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:50,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:13:50,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315178073] [2020-11-11 15:13:50,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:50,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:50,459 INFO L87 Difference]: Start difference. First operand 2052 states and 5526 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:51,143 INFO L93 Difference]: Finished difference Result 3245 states and 8090 transitions. [2020-11-11 15:13:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:13:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:51,148 INFO L225 Difference]: With dead ends: 3245 [2020-11-11 15:13:51,149 INFO L226 Difference]: Without dead ends: 2975 [2020-11-11 15:13:51,149 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2020-11-11 15:13:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2102. [2020-11-11 15:13:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.701570680628272) internal successors, (5676), 2101 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5676 transitions. [2020-11-11 15:13:51,177 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5676 transitions. Word has length 111 [2020-11-11 15:13:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:51,177 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5676 transitions. [2020-11-11 15:13:51,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5676 transitions. [2020-11-11 15:13:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:51,179 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:51,179 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:51,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-11-11 15:13:51,380 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1036947371, now seen corresponding path program 134 times [2020-11-11 15:13:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:51,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579044005] [2020-11-11 15:13:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:51,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579044005] [2020-11-11 15:13:51,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588393171] [2020-11-11 15:13:51,758 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:51,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:51,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:51,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:51,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:51,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:51,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:13:51,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759152663] [2020-11-11 15:13:51,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:51,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:51,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:51,883 INFO L87 Difference]: Start difference. First operand 2102 states and 5676 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:52,671 INFO L93 Difference]: Finished difference Result 3640 states and 8930 transitions. [2020-11-11 15:13:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:52,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:13:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:52,675 INFO L225 Difference]: With dead ends: 3640 [2020-11-11 15:13:52,676 INFO L226 Difference]: Without dead ends: 3370 [2020-11-11 15:13:52,676 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2020-11-11 15:13:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2152. [2020-11-11 15:13:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.708507670850767) internal successors, (5826), 2151 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5826 transitions. [2020-11-11 15:13:52,705 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5826 transitions. Word has length 111 [2020-11-11 15:13:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:52,705 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5826 transitions. [2020-11-11 15:13:52,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5826 transitions. [2020-11-11 15:13:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:52,707 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:52,707 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:52,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-11-11 15:13:52,908 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:52,908 INFO L82 PathProgramCache]: Analyzing trace with hash -962645981, now seen corresponding path program 135 times [2020-11-11 15:13:52,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:52,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671386850] [2020-11-11 15:13:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:53,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671386850] [2020-11-11 15:13:53,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554554238] [2020-11-11 15:13:53,249 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:53,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:13:53,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:53,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-11 15:13:53,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:53,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:53,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:53,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:13:53,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932103137] [2020-11-11 15:13:53,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:53,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:53,348 INFO L87 Difference]: Start difference. First operand 2152 states and 5826 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:54,084 INFO L93 Difference]: Finished difference Result 3645 states and 8990 transitions. [2020-11-11 15:13:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:13:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:54,090 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:13:54,090 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:13:54,090 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:13:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2202. [2020-11-11 15:13:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.7151294865970015) internal successors, (5976), 2201 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5976 transitions. [2020-11-11 15:13:54,122 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5976 transitions. Word has length 111 [2020-11-11 15:13:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:54,122 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5976 transitions. [2020-11-11 15:13:54,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5976 transitions. [2020-11-11 15:13:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:54,124 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:54,124 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:54,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-11-11 15:13:54,325 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash -326628077, now seen corresponding path program 136 times [2020-11-11 15:13:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:54,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027192918] [2020-11-11 15:13:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:54,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027192918] [2020-11-11 15:13:54,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086664712] [2020-11-11 15:13:54,676 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:54,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:13:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:54,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:54,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:54,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:54,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:13:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756265431] [2020-11-11 15:13:54,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:54,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:54,798 INFO L87 Difference]: Start difference. First operand 2202 states and 5976 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:55,703 INFO L93 Difference]: Finished difference Result 3645 states and 9040 transitions. [2020-11-11 15:13:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:13:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:55,708 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:13:55,708 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:13:55,709 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:13:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:13:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2252. [2020-11-11 15:13:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7214571301643713) internal successors, (6126), 2251 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6126 transitions. [2020-11-11 15:13:55,740 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6126 transitions. Word has length 111 [2020-11-11 15:13:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:55,740 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6126 transitions. [2020-11-11 15:13:55,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6126 transitions. [2020-11-11 15:13:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:55,742 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:55,742 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:55,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-11-11 15:13:55,943 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -216099231, now seen corresponding path program 137 times [2020-11-11 15:13:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:55,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358776309] [2020-11-11 15:13:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:56,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358776309] [2020-11-11 15:13:56,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955352900] [2020-11-11 15:13:56,327 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:56,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:13:56,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:56,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:56,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:56,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:56,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:13:56,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886521700] [2020-11-11 15:13:56,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:56,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:56,471 INFO L87 Difference]: Start difference. First operand 2252 states and 6126 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:57,250 INFO L93 Difference]: Finished difference Result 3645 states and 9090 transitions. [2020-11-11 15:13:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:57,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:13:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:57,255 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:13:57,255 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:13:57,256 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:13:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:13:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2302. [2020-11-11 15:13:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.727509778357236) internal successors, (6276), 2301 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6276 transitions. [2020-11-11 15:13:57,291 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6276 transitions. Word has length 111 [2020-11-11 15:13:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:57,292 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6276 transitions. [2020-11-11 15:13:57,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6276 transitions. [2020-11-11 15:13:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:57,294 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:57,294 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:57,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-11-11 15:13:57,495 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1847189329, now seen corresponding path program 138 times [2020-11-11 15:13:57,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:57,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262978909] [2020-11-11 15:13:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:57,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262978909] [2020-11-11 15:13:57,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102332281] [2020-11-11 15:13:57,840 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:57,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:13:57,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:57,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:57,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:57,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:58,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:58,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:13:58,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72133989] [2020-11-11 15:13:58,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:13:58,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:13:58,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:13:58,002 INFO L87 Difference]: Start difference. First operand 2302 states and 6276 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:58,991 INFO L93 Difference]: Finished difference Result 3645 states and 9140 transitions. [2020-11-11 15:13:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:13:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:58,996 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:13:58,996 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:13:58,997 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:13:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:13:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2352. [2020-11-11 15:13:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.7333049766057) internal successors, (6426), 2351 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6426 transitions. [2020-11-11 15:13:59,030 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6426 transitions. Word has length 111 [2020-11-11 15:13:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:59,030 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6426 transitions. [2020-11-11 15:13:59,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6426 transitions. [2020-11-11 15:13:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:13:59,032 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:59,032 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:59,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:59,234 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1409225247, now seen corresponding path program 139 times [2020-11-11 15:13:59,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:59,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006799621] [2020-11-11 15:13:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:59,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006799621] [2020-11-11 15:13:59,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683020437] [2020-11-11 15:13:59,557 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:59,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:59,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:59,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:13:59,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632567531] [2020-11-11 15:13:59,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:59,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:59,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:59,652 INFO L87 Difference]: Start difference. First operand 2352 states and 6426 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:00,522 INFO L93 Difference]: Finished difference Result 3645 states and 9190 transitions. [2020-11-11 15:14:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:00,527 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:00,527 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:00,528 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:14:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2402. [2020-11-11 15:14:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7388588088296544) internal successors, (6576), 2401 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6576 transitions. [2020-11-11 15:14:00,562 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6576 transitions. Word has length 111 [2020-11-11 15:14:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:00,562 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6576 transitions. [2020-11-11 15:14:00,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6576 transitions. [2020-11-11 15:14:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:00,564 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:00,564 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:00,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:00,765 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:00,766 INFO L82 PathProgramCache]: Analyzing trace with hash -136067313, now seen corresponding path program 140 times [2020-11-11 15:14:00,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:00,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920276848] [2020-11-11 15:14:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920276848] [2020-11-11 15:14:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589692420] [2020-11-11 15:14:01,089 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:01,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:01,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:01,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:01,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:01,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:01,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:01,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031469510] [2020-11-11 15:14:01,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:01,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:01,234 INFO L87 Difference]: Start difference. First operand 2402 states and 6576 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:02,311 INFO L93 Difference]: Finished difference Result 3645 states and 9240 transitions. [2020-11-11 15:14:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:02,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:02,317 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:02,317 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:02,318 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:14:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2452. [2020-11-11 15:14:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.744186046511628) internal successors, (6726), 2451 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6726 transitions. [2020-11-11 15:14:02,353 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6726 transitions. Word has length 111 [2020-11-11 15:14:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:02,353 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6726 transitions. [2020-11-11 15:14:02,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6726 transitions. [2020-11-11 15:14:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:02,355 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:02,355 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:02,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:02,556 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash -703233187, now seen corresponding path program 141 times [2020-11-11 15:14:02,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:02,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743222472] [2020-11-11 15:14:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:02,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743222472] [2020-11-11 15:14:02,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998063880] [2020-11-11 15:14:02,854 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:02,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:14:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:14:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:02,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:02,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:02,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:02,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260789462] [2020-11-11 15:14:02,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:02,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:02,957 INFO L87 Difference]: Start difference. First operand 2452 states and 6726 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:03,885 INFO L93 Difference]: Finished difference Result 3645 states and 9290 transitions. [2020-11-11 15:14:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:03,890 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:03,891 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:03,891 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:14:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2502. [2020-11-11 15:14:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7493002798880446) internal successors, (6876), 2501 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6876 transitions. [2020-11-11 15:14:03,927 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6876 transitions. Word has length 111 [2020-11-11 15:14:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:03,927 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6876 transitions. [2020-11-11 15:14:03,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6876 transitions. [2020-11-11 15:14:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:03,929 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:03,929 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:04,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:04,130 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash 125477965, now seen corresponding path program 142 times [2020-11-11 15:14:04,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:04,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068194135] [2020-11-11 15:14:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:04,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068194135] [2020-11-11 15:14:04,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39398417] [2020-11-11 15:14:04,467 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:04,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:04,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:04,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:04,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:04,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:04,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:04,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:04,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:04,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445368185] [2020-11-11 15:14:04,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:04,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:04,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:04,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:04,591 INFO L87 Difference]: Start difference. First operand 2502 states and 6876 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:05,783 INFO L93 Difference]: Finished difference Result 3645 states and 9340 transitions. [2020-11-11 15:14:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:14:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:05,788 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:05,788 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:05,789 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:14:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2552. [2020-11-11 15:14:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7542140337122696) internal successors, (7026), 2551 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7026 transitions. [2020-11-11 15:14:05,825 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7026 transitions. Word has length 111 [2020-11-11 15:14:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:05,825 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 7026 transitions. [2020-11-11 15:14:05,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7026 transitions. [2020-11-11 15:14:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:05,827 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:05,827 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:06,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:06,028 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1597060581, now seen corresponding path program 143 times [2020-11-11 15:14:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:06,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497443497] [2020-11-11 15:14:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497443497] [2020-11-11 15:14:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720369286] [2020-11-11 15:14:06,323 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:06,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:14:06,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:06,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:06,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:06,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:06,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:06,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763767606] [2020-11-11 15:14:06,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:06,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:06,429 INFO L87 Difference]: Start difference. First operand 2552 states and 7026 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:07,449 INFO L93 Difference]: Finished difference Result 3645 states and 9390 transitions. [2020-11-11 15:14:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:07,454 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:07,454 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:07,454 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:14:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2602. [2020-11-11 15:14:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.758938869665513) internal successors, (7176), 2601 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7176 transitions. [2020-11-11 15:14:07,490 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7176 transitions. Word has length 111 [2020-11-11 15:14:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:07,490 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7176 transitions. [2020-11-11 15:14:07,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7176 transitions. [2020-11-11 15:14:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:07,492 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:07,492 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:07,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-11-11 15:14:07,695 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:07,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1158371083, now seen corresponding path program 144 times [2020-11-11 15:14:07,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:07,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28514435] [2020-11-11 15:14:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:08,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28514435] [2020-11-11 15:14:08,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540640899] [2020-11-11 15:14:08,001 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:08,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:14:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:14:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:08,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:08,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:08,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:08,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312298819] [2020-11-11 15:14:08,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:08,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:08,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:08,141 INFO L87 Difference]: Start difference. First operand 2602 states and 7176 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:09,376 INFO L93 Difference]: Finished difference Result 3645 states and 9440 transitions. [2020-11-11 15:14:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:14:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:09,381 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:09,381 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:09,382 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=761, Invalid=2431, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:14:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2652. [2020-11-11 15:14:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.763485477178423) internal successors, (7326), 2651 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7326 transitions. [2020-11-11 15:14:09,419 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7326 transitions. Word has length 111 [2020-11-11 15:14:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:09,419 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7326 transitions. [2020-11-11 15:14:09,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7326 transitions. [2020-11-11 15:14:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:09,421 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:09,421 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:09,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-11-11 15:14:09,635 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash -198195623, now seen corresponding path program 145 times [2020-11-11 15:14:09,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:09,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16642297] [2020-11-11 15:14:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16642297] [2020-11-11 15:14:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013253314] [2020-11-11 15:14:09,929 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:10,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:10,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:10,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028694462] [2020-11-11 15:14:10,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:10,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:10,049 INFO L87 Difference]: Start difference. First operand 2652 states and 7326 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:11,118 INFO L93 Difference]: Finished difference Result 3645 states and 9490 transitions. [2020-11-11 15:14:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:14:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:11,124 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:14:11,124 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:14:11,124 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:14:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:14:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2702. [2020-11-11 15:14:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.767863754165124) internal successors, (7476), 2701 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7476 transitions. [2020-11-11 15:14:11,159 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7476 transitions. Word has length 111 [2020-11-11 15:14:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:11,159 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7476 transitions. [2020-11-11 15:14:11,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7476 transitions. [2020-11-11 15:14:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:11,161 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:11,161 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:11,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-11-11 15:14:11,362 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:11,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1633337161, now seen corresponding path program 146 times [2020-11-11 15:14:11,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:11,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365718849] [2020-11-11 15:14:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365718849] [2020-11-11 15:14:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45197608] [2020-11-11 15:14:11,666 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:11,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:11,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:11,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:11,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:11,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977813226] [2020-11-11 15:14:11,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:11,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:11,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:11,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:11,808 INFO L87 Difference]: Start difference. First operand 2702 states and 7476 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:13,186 INFO L93 Difference]: Finished difference Result 3690 states and 9660 transitions. [2020-11-11 15:14:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:14:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:13,191 INFO L225 Difference]: With dead ends: 3690 [2020-11-11 15:14:13,191 INFO L226 Difference]: Without dead ends: 3420 [2020-11-11 15:14:13,191 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=913, Invalid=2509, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:14:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2020-11-11 15:14:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2752. [2020-11-11 15:14:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7775354416575793) internal successors, (7641), 2751 states have internal predecessors, (7641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7641 transitions. [2020-11-11 15:14:13,228 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7641 transitions. Word has length 111 [2020-11-11 15:14:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:13,229 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7641 transitions. [2020-11-11 15:14:13,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7641 transitions. [2020-11-11 15:14:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:13,231 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:13,231 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:13,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-11-11 15:14:13,432 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2032838633, now seen corresponding path program 147 times [2020-11-11 15:14:13,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:13,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739261807] [2020-11-11 15:14:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:13,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739261807] [2020-11-11 15:14:13,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123838805] [2020-11-11 15:14:13,730 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:13,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:14:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:13,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:13,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:13,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:13,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76550497] [2020-11-11 15:14:13,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:13,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:13,835 INFO L87 Difference]: Start difference. First operand 2752 states and 7641 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:14,977 INFO L93 Difference]: Finished difference Result 4752 states and 12744 transitions. [2020-11-11 15:14:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:14:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:14,984 INFO L225 Difference]: With dead ends: 4752 [2020-11-11 15:14:14,984 INFO L226 Difference]: Without dead ends: 4482 [2020-11-11 15:14:14,985 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:14:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2020-11-11 15:14:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 2877. [2020-11-11 15:14:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.7927677329624476) internal successors, (8032), 2876 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8032 transitions. [2020-11-11 15:14:15,029 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8032 transitions. Word has length 111 [2020-11-11 15:14:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:15,029 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 8032 transitions. [2020-11-11 15:14:15,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8032 transitions. [2020-11-11 15:14:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:15,032 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:15,032 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:15,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:15,233 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash -321630679, now seen corresponding path program 148 times [2020-11-11 15:14:15,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:15,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676490601] [2020-11-11 15:14:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:15,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676490601] [2020-11-11 15:14:15,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658827041] [2020-11-11 15:14:15,525 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:15,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:15,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:15,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:15,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:15,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:15,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033279036] [2020-11-11 15:14:15,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:15,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:15,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:15,650 INFO L87 Difference]: Start difference. First operand 2877 states and 8032 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:17,054 INFO L93 Difference]: Finished difference Result 3766 states and 10050 transitions. [2020-11-11 15:14:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:14:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2020-11-11 15:14:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:17,060 INFO L225 Difference]: With dead ends: 3766 [2020-11-11 15:14:17,060 INFO L226 Difference]: Without dead ends: 3355 [2020-11-11 15:14:17,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:14:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2020-11-11 15:14:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1991. [2020-11-11 15:14:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 2.6974874371859294) internal successors, (5368), 1990 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 5368 transitions. [2020-11-11 15:14:17,089 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 5368 transitions. Word has length 111 [2020-11-11 15:14:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:17,089 INFO L481 AbstractCegarLoop]: Abstraction has 1991 states and 5368 transitions. [2020-11-11 15:14:17,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 5368 transitions. [2020-11-11 15:14:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:17,091 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:17,091 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:17,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:17,294 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:17,295 INFO L82 PathProgramCache]: Analyzing trace with hash -475852177, now seen corresponding path program 149 times [2020-11-11 15:14:17,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:17,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761693384] [2020-11-11 15:14:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:17,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761693384] [2020-11-11 15:14:17,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403911158] [2020-11-11 15:14:17,710 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:17,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:14:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:17,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:17,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:17,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:17,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:14:17,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188260098] [2020-11-11 15:14:17,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:14:17,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:14:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:14:17,857 INFO L87 Difference]: Start difference. First operand 1991 states and 5368 transitions. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:18,661 INFO L93 Difference]: Finished difference Result 3209 states and 8252 transitions. [2020-11-11 15:14:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:18,666 INFO L225 Difference]: With dead ends: 3209 [2020-11-11 15:14:18,666 INFO L226 Difference]: Without dead ends: 2875 [2020-11-11 15:14:18,667 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2020-11-11 15:14:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2076. [2020-11-11 15:14:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.6689156626506025) internal successors, (5538), 2075 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 5538 transitions. [2020-11-11 15:14:18,694 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 5538 transitions. Word has length 116 [2020-11-11 15:14:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:18,694 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 5538 transitions. [2020-11-11 15:14:18,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 5538 transitions. [2020-11-11 15:14:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:18,696 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:18,696 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:18,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-11-11 15:14:18,897 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash -847396067, now seen corresponding path program 150 times [2020-11-11 15:14:18,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:18,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456889311] [2020-11-11 15:14:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:19,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456889311] [2020-11-11 15:14:19,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641427815] [2020-11-11 15:14:19,316 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:19,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:14:19,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:19,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:19,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:19,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:19,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:19,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091815771] [2020-11-11 15:14:19,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:19,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:19,425 INFO L87 Difference]: Start difference. First operand 2076 states and 5538 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:20,069 INFO L93 Difference]: Finished difference Result 3860 states and 9320 transitions. [2020-11-11 15:14:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:20,075 INFO L225 Difference]: With dead ends: 3860 [2020-11-11 15:14:20,075 INFO L226 Difference]: Without dead ends: 3590 [2020-11-11 15:14:20,075 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2020-11-11 15:14:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2177. [2020-11-11 15:14:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.677389705882353) internal successors, (5826), 2176 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 5826 transitions. [2020-11-11 15:14:20,118 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 5826 transitions. Word has length 116 [2020-11-11 15:14:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:20,119 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 5826 transitions. [2020-11-11 15:14:20,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 5826 transitions. [2020-11-11 15:14:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:20,121 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:20,122 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:20,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:20,335 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 835110925, now seen corresponding path program 151 times [2020-11-11 15:14:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:20,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604023985] [2020-11-11 15:14:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604023985] [2020-11-11 15:14:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458062878] [2020-11-11 15:14:20,764 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:20,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:20,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:20,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:20,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:20,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:20,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913370332] [2020-11-11 15:14:20,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:20,896 INFO L87 Difference]: Start difference. First operand 2177 states and 5826 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:21,800 INFO L93 Difference]: Finished difference Result 3795 states and 9240 transitions. [2020-11-11 15:14:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:21,806 INFO L225 Difference]: With dead ends: 3795 [2020-11-11 15:14:21,806 INFO L226 Difference]: Without dead ends: 3525 [2020-11-11 15:14:21,807 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2020-11-11 15:14:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 2227. [2020-11-11 15:14:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 2.684636118598383) internal successors, (5976), 2226 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 5976 transitions. [2020-11-11 15:14:21,860 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 5976 transitions. Word has length 116 [2020-11-11 15:14:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:21,860 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 5976 transitions. [2020-11-11 15:14:21,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 5976 transitions. [2020-11-11 15:14:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:21,862 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:21,862 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:22,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:22,065 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1017536933, now seen corresponding path program 152 times [2020-11-11 15:14:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:22,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942129918] [2020-11-11 15:14:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:22,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942129918] [2020-11-11 15:14:22,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857548594] [2020-11-11 15:14:22,452 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:22,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:22,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:22,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:22,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:22,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680310323] [2020-11-11 15:14:22,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:22,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:22,552 INFO L87 Difference]: Start difference. First operand 2227 states and 5976 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:23,281 INFO L93 Difference]: Finished difference Result 3820 states and 9340 transitions. [2020-11-11 15:14:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:14:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:23,286 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:23,287 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:23,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2277. [2020-11-11 15:14:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 2.6915641476274166) internal successors, (6126), 2276 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 6126 transitions. [2020-11-11 15:14:23,320 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 6126 transitions. Word has length 116 [2020-11-11 15:14:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:23,320 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 6126 transitions. [2020-11-11 15:14:23,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 6126 transitions. [2020-11-11 15:14:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:23,322 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:23,322 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:23,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:23,523 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -951644341, now seen corresponding path program 153 times [2020-11-11 15:14:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:23,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075041000] [2020-11-11 15:14:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:23,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075041000] [2020-11-11 15:14:23,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456726932] [2020-11-11 15:14:23,926 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:23,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:14:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:23,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:23,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:24,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:24,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:24,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:24,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033457387] [2020-11-11 15:14:24,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:24,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:24,061 INFO L87 Difference]: Start difference. First operand 2277 states and 6126 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:25,006 INFO L93 Difference]: Finished difference Result 3820 states and 9390 transitions. [2020-11-11 15:14:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:25,012 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:25,012 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:25,012 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2327. [2020-11-11 15:14:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.698194325021496) internal successors, (6276), 2326 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6276 transitions. [2020-11-11 15:14:25,045 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6276 transitions. Word has length 116 [2020-11-11 15:14:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:25,045 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6276 transitions. [2020-11-11 15:14:25,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6276 transitions. [2020-11-11 15:14:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:25,047 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:25,047 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:25,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-11-11 15:14:25,248 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash -877342951, now seen corresponding path program 154 times [2020-11-11 15:14:25,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:25,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885215723] [2020-11-11 15:14:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:25,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885215723] [2020-11-11 15:14:25,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997534060] [2020-11-11 15:14:25,617 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:25,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:14:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:25,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:25,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:25,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:25,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525880908] [2020-11-11 15:14:25,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:25,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:25,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:25,719 INFO L87 Difference]: Start difference. First operand 2327 states and 6276 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:26,560 INFO L93 Difference]: Finished difference Result 3820 states and 9440 transitions. [2020-11-11 15:14:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:26,566 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:26,566 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:26,566 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2377. [2020-11-11 15:14:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.7045454545454546) internal successors, (6426), 2376 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6426 transitions. [2020-11-11 15:14:26,600 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6426 transitions. Word has length 116 [2020-11-11 15:14:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:26,600 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6426 transitions. [2020-11-11 15:14:26,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6426 transitions. [2020-11-11 15:14:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:26,602 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:26,602 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:26,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-11-11 15:14:26,803 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash -241325047, now seen corresponding path program 155 times [2020-11-11 15:14:26,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:26,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243662838] [2020-11-11 15:14:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:27,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243662838] [2020-11-11 15:14:27,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321172972] [2020-11-11 15:14:27,204 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:27,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:14:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:27,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:27,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:27,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:27,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:27,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305701682] [2020-11-11 15:14:27,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:27,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:27,334 INFO L87 Difference]: Start difference. First operand 2377 states and 6426 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:28,396 INFO L93 Difference]: Finished difference Result 3820 states and 9490 transitions. [2020-11-11 15:14:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:14:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:28,401 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:28,401 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:28,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2427. [2020-11-11 15:14:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.7106347897774112) internal successors, (6576), 2426 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6576 transitions. [2020-11-11 15:14:28,435 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6576 transitions. Word has length 116 [2020-11-11 15:14:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:28,436 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6576 transitions. [2020-11-11 15:14:28,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6576 transitions. [2020-11-11 15:14:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:28,438 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:28,438 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:28,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-11-11 15:14:28,638 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash -130796201, now seen corresponding path program 156 times [2020-11-11 15:14:28,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:28,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501399926] [2020-11-11 15:14:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501399926] [2020-11-11 15:14:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698523122] [2020-11-11 15:14:28,987 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:29,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:14:29,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:29,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:29,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:29,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316953310] [2020-11-11 15:14:29,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:29,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:29,098 INFO L87 Difference]: Start difference. First operand 2427 states and 6576 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:30,006 INFO L93 Difference]: Finished difference Result 3820 states and 9540 transitions. [2020-11-11 15:14:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:30,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:30,012 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:30,012 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:30,012 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2477. [2020-11-11 15:14:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.7164781906300486) internal successors, (6726), 2476 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 6726 transitions. [2020-11-11 15:14:30,047 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 6726 transitions. Word has length 116 [2020-11-11 15:14:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:30,047 INFO L481 AbstractCegarLoop]: Abstraction has 2477 states and 6726 transitions. [2020-11-11 15:14:30,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 6726 transitions. [2020-11-11 15:14:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:30,049 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:30,049 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:30,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-11-11 15:14:30,250 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1932492359, now seen corresponding path program 157 times [2020-11-11 15:14:30,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:30,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411445619] [2020-11-11 15:14:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411445619] [2020-11-11 15:14:30,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777890761] [2020-11-11 15:14:30,651 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:30,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:30,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:30,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:30,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:30,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897214538] [2020-11-11 15:14:30,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:30,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:30,779 INFO L87 Difference]: Start difference. First operand 2477 states and 6726 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:31,904 INFO L93 Difference]: Finished difference Result 3820 states and 9590 transitions. [2020-11-11 15:14:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:31,911 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:31,911 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:31,912 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2527. [2020-11-11 15:14:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.7220902612826605) internal successors, (6876), 2526 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6876 transitions. [2020-11-11 15:14:31,948 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6876 transitions. Word has length 116 [2020-11-11 15:14:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:31,948 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6876 transitions. [2020-11-11 15:14:31,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6876 transitions. [2020-11-11 15:14:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:31,950 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:31,950 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:32,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-11-11 15:14:32,151 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1494528277, now seen corresponding path program 158 times [2020-11-11 15:14:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:32,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780349027] [2020-11-11 15:14:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:32,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780349027] [2020-11-11 15:14:32,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176520391] [2020-11-11 15:14:32,613 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:32,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:32,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:32,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:32,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:32,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:32,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:32,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906204807] [2020-11-11 15:14:32,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:32,783 INFO L87 Difference]: Start difference. First operand 2527 states and 6876 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:33,873 INFO L93 Difference]: Finished difference Result 3820 states and 9640 transitions. [2020-11-11 15:14:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:33,879 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:33,879 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:33,879 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2577. [2020-11-11 15:14:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 2.7274844720496896) internal successors, (7026), 2576 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 7026 transitions. [2020-11-11 15:14:33,914 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 7026 transitions. Word has length 116 [2020-11-11 15:14:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:33,914 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 7026 transitions. [2020-11-11 15:14:33,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 7026 transitions. [2020-11-11 15:14:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:33,916 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:33,916 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:34,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-11-11 15:14:34,117 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash -50764283, now seen corresponding path program 159 times [2020-11-11 15:14:34,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:34,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072949400] [2020-11-11 15:14:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:34,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072949400] [2020-11-11 15:14:34,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678532345] [2020-11-11 15:14:34,487 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:34,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:14:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-11 15:14:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:34,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:34,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:34,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:34,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713862175] [2020-11-11 15:14:34,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:34,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:34,622 INFO L87 Difference]: Start difference. First operand 2577 states and 7026 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:35,806 INFO L93 Difference]: Finished difference Result 3820 states and 9690 transitions. [2020-11-11 15:14:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:35,811 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:35,812 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:35,812 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=638, Invalid=2224, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2627. [2020-11-11 15:14:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.732673267326733) internal successors, (7176), 2626 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7176 transitions. [2020-11-11 15:14:35,851 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7176 transitions. Word has length 116 [2020-11-11 15:14:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:35,851 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7176 transitions. [2020-11-11 15:14:35,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7176 transitions. [2020-11-11 15:14:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:35,853 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:35,853 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:36,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:36,054 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash -617930157, now seen corresponding path program 160 times [2020-11-11 15:14:36,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:36,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065072966] [2020-11-11 15:14:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:36,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065072966] [2020-11-11 15:14:36,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847664281] [2020-11-11 15:14:36,391 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:36,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:14:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:36,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:36,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:36,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:36,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293252461] [2020-11-11 15:14:36,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:36,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:36,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:36,493 INFO L87 Difference]: Start difference. First operand 2627 states and 7176 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:37,562 INFO L93 Difference]: Finished difference Result 3820 states and 9740 transitions. [2020-11-11 15:14:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:37,567 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:37,567 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:37,567 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2677. [2020-11-11 15:14:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.7376681614349776) internal successors, (7326), 2676 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7326 transitions. [2020-11-11 15:14:37,601 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7326 transitions. Word has length 116 [2020-11-11 15:14:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:37,601 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7326 transitions. [2020-11-11 15:14:37,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7326 transitions. [2020-11-11 15:14:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:37,603 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:37,603 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:37,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:37,804 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash 210780995, now seen corresponding path program 161 times [2020-11-11 15:14:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:37,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155585431] [2020-11-11 15:14:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:38,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155585431] [2020-11-11 15:14:38,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594206922] [2020-11-11 15:14:38,164 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:38,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:14:38,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:38,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:38,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:38,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:38,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696000614] [2020-11-11 15:14:38,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:38,296 INFO L87 Difference]: Start difference. First operand 2677 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:39,696 INFO L93 Difference]: Finished difference Result 3820 states and 9790 transitions. [2020-11-11 15:14:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:14:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:39,702 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:39,702 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:39,703 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:14:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2727. [2020-11-11 15:14:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.7424798239178285) internal successors, (7476), 2726 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7476 transitions. [2020-11-11 15:14:39,767 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7476 transitions. Word has length 116 [2020-11-11 15:14:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:39,767 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7476 transitions. [2020-11-11 15:14:39,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7476 transitions. [2020-11-11 15:14:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:39,770 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:39,770 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:39,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:39,971 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:39,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1511757551, now seen corresponding path program 162 times [2020-11-11 15:14:39,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:39,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899488148] [2020-11-11 15:14:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:40,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899488148] [2020-11-11 15:14:40,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347778735] [2020-11-11 15:14:40,299 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:40,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:14:40,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:14:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:40,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:40,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:40,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:40,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706954531] [2020-11-11 15:14:40,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:40,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:40,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:40,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:40,415 INFO L87 Difference]: Start difference. First operand 2727 states and 7476 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:41,567 INFO L93 Difference]: Finished difference Result 3820 states and 9840 transitions. [2020-11-11 15:14:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:41,573 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:41,573 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:41,574 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:14:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2777. [2020-11-11 15:14:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.7471181556195967) internal successors, (7626), 2776 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 7626 transitions. [2020-11-11 15:14:41,612 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 7626 transitions. Word has length 116 [2020-11-11 15:14:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:41,613 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 7626 transitions. [2020-11-11 15:14:41,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 7626 transitions. [2020-11-11 15:14:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:41,615 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:41,615 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:41,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:41,816 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1243674113, now seen corresponding path program 163 times [2020-11-11 15:14:41,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:41,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607108655] [2020-11-11 15:14:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607108655] [2020-11-11 15:14:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141525704] [2020-11-11 15:14:42,168 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:42,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:42,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:42,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:42,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:42,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:42,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780586933] [2020-11-11 15:14:42,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:42,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:42,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:42,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:42,291 INFO L87 Difference]: Start difference. First operand 2777 states and 7626 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:43,821 INFO L93 Difference]: Finished difference Result 3820 states and 9890 transitions. [2020-11-11 15:14:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:14:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:43,827 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:43,827 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:43,828 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:14:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2827. [2020-11-11 15:14:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.751592356687898) internal successors, (7776), 2826 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7776 transitions. [2020-11-11 15:14:43,886 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7776 transitions. Word has length 116 [2020-11-11 15:14:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:43,887 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 7776 transitions. [2020-11-11 15:14:43,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7776 transitions. [2020-11-11 15:14:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:43,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:43,890 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:44,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:44,105 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash -112892593, now seen corresponding path program 164 times [2020-11-11 15:14:44,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:44,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048293801] [2020-11-11 15:14:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048293801] [2020-11-11 15:14:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351822952] [2020-11-11 15:14:44,427 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:44,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:44,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:44,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:44,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:44,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:44,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197302018] [2020-11-11 15:14:44,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:44,533 INFO L87 Difference]: Start difference. First operand 2827 states and 7776 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:45,809 INFO L93 Difference]: Finished difference Result 3820 states and 9940 transitions. [2020-11-11 15:14:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:14:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:45,814 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:14:45,815 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:14:45,815 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:14:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:14:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2877. [2020-11-11 15:14:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.755910987482615) internal successors, (7926), 2876 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 7926 transitions. [2020-11-11 15:14:45,855 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 7926 transitions. Word has length 116 [2020-11-11 15:14:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:45,855 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 7926 transitions. [2020-11-11 15:14:45,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 7926 transitions. [2020-11-11 15:14:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:45,858 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:45,858 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:46,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:46,059 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1718640191, now seen corresponding path program 165 times [2020-11-11 15:14:46,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:46,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588819291] [2020-11-11 15:14:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:46,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588819291] [2020-11-11 15:14:46,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598030176] [2020-11-11 15:14:46,422 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:46,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:14:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:14:46,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:46,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:46,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:46,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:46,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41732356] [2020-11-11 15:14:46,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:46,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:46,562 INFO L87 Difference]: Start difference. First operand 2877 states and 7926 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:48,059 INFO L93 Difference]: Finished difference Result 3865 states and 10110 transitions. [2020-11-11 15:14:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:14:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:48,065 INFO L225 Difference]: With dead ends: 3865 [2020-11-11 15:14:48,065 INFO L226 Difference]: Without dead ends: 3595 [2020-11-11 15:14:48,066 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=860, Invalid=2680, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:14:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2020-11-11 15:14:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2927. [2020-11-11 15:14:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.7652084757347914) internal successors, (8091), 2926 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8091 transitions. [2020-11-11 15:14:48,108 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8091 transitions. Word has length 116 [2020-11-11 15:14:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:48,108 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 8091 transitions. [2020-11-11 15:14:48,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8091 transitions. [2020-11-11 15:14:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:48,111 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:48,111 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:48,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-11-11 15:14:48,311 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1947535603, now seen corresponding path program 166 times [2020-11-11 15:14:48,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:48,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705301759] [2020-11-11 15:14:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:48,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705301759] [2020-11-11 15:14:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306534408] [2020-11-11 15:14:48,658 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:48,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:14:48,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:48,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:48,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:48,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:48,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588329801] [2020-11-11 15:14:48,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:48,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:48,759 INFO L87 Difference]: Start difference. First operand 2927 states and 8091 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:50,065 INFO L93 Difference]: Finished difference Result 4952 states and 13244 transitions. [2020-11-11 15:14:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:14:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:50,072 INFO L225 Difference]: With dead ends: 4952 [2020-11-11 15:14:50,072 INFO L226 Difference]: Without dead ends: 4682 [2020-11-11 15:14:50,073 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:14:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2020-11-11 15:14:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 3052. [2020-11-11 15:14:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.780072107505736) internal successors, (8482), 3051 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8482 transitions. [2020-11-11 15:14:50,117 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8482 transitions. Word has length 116 [2020-11-11 15:14:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:50,117 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8482 transitions. [2020-11-11 15:14:50,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8482 transitions. [2020-11-11 15:14:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:50,120 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:50,120 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:50,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:50,322 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash -236327649, now seen corresponding path program 167 times [2020-11-11 15:14:50,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:50,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125087663] [2020-11-11 15:14:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125087663] [2020-11-11 15:14:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72277662] [2020-11-11 15:14:50,658 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:50,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:14:50,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:50,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:50,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:50,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:50,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:50,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493502714] [2020-11-11 15:14:50,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:50,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:50,790 INFO L87 Difference]: Start difference. First operand 3052 states and 8482 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:52,490 INFO L93 Difference]: Finished difference Result 3991 states and 10600 transitions. [2020-11-11 15:14:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:14:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2020-11-11 15:14:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:52,495 INFO L225 Difference]: With dead ends: 3991 [2020-11-11 15:14:52,495 INFO L226 Difference]: Without dead ends: 3580 [2020-11-11 15:14:52,495 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:14:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2020-11-11 15:14:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 2202. [2020-11-11 15:14:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.692412539754657) internal successors, (5926), 2201 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5926 transitions. [2020-11-11 15:14:52,527 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5926 transitions. Word has length 116 [2020-11-11 15:14:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:52,527 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5926 transitions. [2020-11-11 15:14:52,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5926 transitions. [2020-11-11 15:14:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:14:52,529 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:52,529 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:52,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-11-11 15:14:52,730 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash 392291254, now seen corresponding path program 168 times [2020-11-11 15:14:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:52,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283774595] [2020-11-11 15:14:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:53,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283774595] [2020-11-11 15:14:53,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434785082] [2020-11-11 15:14:53,175 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:53,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:14:53,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:53,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:53,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:53,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:14:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665227278] [2020-11-11 15:14:53,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:14:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:14:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:14:53,317 INFO L87 Difference]: Start difference. First operand 2202 states and 5926 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:54,161 INFO L93 Difference]: Finished difference Result 3495 states and 8690 transitions. [2020-11-11 15:14:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:14:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:54,166 INFO L225 Difference]: With dead ends: 3495 [2020-11-11 15:14:54,166 INFO L226 Difference]: Without dead ends: 3225 [2020-11-11 15:14:54,167 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:14:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-11-11 15:14:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2252. [2020-11-11 15:14:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.699244780097734) internal successors, (6076), 2251 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6076 transitions. [2020-11-11 15:14:54,197 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6076 transitions. Word has length 121 [2020-11-11 15:14:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:54,198 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6076 transitions. [2020-11-11 15:14:54,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6076 transitions. [2020-11-11 15:14:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:14:54,200 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:54,200 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:54,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:54,401 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2074798246, now seen corresponding path program 169 times [2020-11-11 15:14:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:54,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57547310] [2020-11-11 15:14:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:54,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57547310] [2020-11-11 15:14:54,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762415182] [2020-11-11 15:14:54,886 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:54,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:55,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:55,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:55,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:14:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607705364] [2020-11-11 15:14:55,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:14:55,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:14:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:14:55,051 INFO L87 Difference]: Start difference. First operand 2252 states and 6076 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:56,017 INFO L93 Difference]: Finished difference Result 3940 states and 9630 transitions. [2020-11-11 15:14:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:14:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:56,022 INFO L225 Difference]: With dead ends: 3940 [2020-11-11 15:14:56,023 INFO L226 Difference]: Without dead ends: 3670 [2020-11-11 15:14:56,023 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2020-11-11 15:14:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2302. [2020-11-11 15:14:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.705780095610604) internal successors, (6226), 2301 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6226 transitions. [2020-11-11 15:14:56,056 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6226 transitions. Word has length 121 [2020-11-11 15:14:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:56,057 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6226 transitions. [2020-11-11 15:14:56,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6226 transitions. [2020-11-11 15:14:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:14:56,059 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:56,059 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:56,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:56,259 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:56,260 INFO L82 PathProgramCache]: Analyzing trace with hash 222150388, now seen corresponding path program 170 times [2020-11-11 15:14:56,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:56,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928533523] [2020-11-11 15:14:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928533523] [2020-11-11 15:14:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393249790] [2020-11-11 15:14:56,690 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:56,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:56,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:56,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:56,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:14:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052223420] [2020-11-11 15:14:56,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:14:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:14:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:14:56,821 INFO L87 Difference]: Start difference. First operand 2302 states and 6226 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:57,727 INFO L93 Difference]: Finished difference Result 3945 states and 9690 transitions. [2020-11-11 15:14:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:57,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:14:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:57,733 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:14:57,733 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:14:57,734 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:14:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2352. [2020-11-11 15:14:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.712037430880476) internal successors, (6376), 2351 states have internal predecessors, (6376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6376 transitions. [2020-11-11 15:14:57,768 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6376 transitions. Word has length 121 [2020-11-11 15:14:57,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:57,768 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6376 transitions. [2020-11-11 15:14:57,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6376 transitions. [2020-11-11 15:14:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:14:57,770 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:57,770 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:57,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-11-11 15:14:57,971 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:57,972 INFO L82 PathProgramCache]: Analyzing trace with hash 288042980, now seen corresponding path program 171 times [2020-11-11 15:14:57,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:57,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649604155] [2020-11-11 15:14:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:58,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649604155] [2020-11-11 15:14:58,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403292187] [2020-11-11 15:14:58,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:58,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:14:58,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-11 15:14:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:58,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:58,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:58,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:14:58,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262922075] [2020-11-11 15:14:58,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:14:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:14:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:14:58,617 INFO L87 Difference]: Start difference. First operand 2352 states and 6376 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:59,682 INFO L93 Difference]: Finished difference Result 3945 states and 9740 transitions. [2020-11-11 15:14:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:14:59,683 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:14:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:59,688 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:14:59,688 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:14:59,688 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=680, Invalid=2182, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:14:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2402. [2020-11-11 15:14:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7180341524364846) internal successors, (6526), 2401 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6526 transitions. [2020-11-11 15:14:59,724 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6526 transitions. Word has length 121 [2020-11-11 15:14:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:59,724 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6526 transitions. [2020-11-11 15:14:59,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6526 transitions. [2020-11-11 15:14:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:14:59,726 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:59,726 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:59,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:59,927 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash 362344370, now seen corresponding path program 172 times [2020-11-11 15:14:59,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:59,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911919572] [2020-11-11 15:14:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:00,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911919572] [2020-11-11 15:15:00,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471542775] [2020-11-11 15:15:00,354 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:00,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:15:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:00,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:00,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:00,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:00,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550465159] [2020-11-11 15:15:00,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:00,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:00,492 INFO L87 Difference]: Start difference. First operand 2402 states and 6526 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:01,472 INFO L93 Difference]: Finished difference Result 3945 states and 9790 transitions. [2020-11-11 15:15:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:01,477 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:01,477 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:01,477 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:15:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2452. [2020-11-11 15:15:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7237862097103225) internal successors, (6676), 2451 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6676 transitions. [2020-11-11 15:15:01,512 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6676 transitions. Word has length 121 [2020-11-11 15:15:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:01,512 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6676 transitions. [2020-11-11 15:15:01,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6676 transitions. [2020-11-11 15:15:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:01,514 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:01,515 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:01,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:01,715 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash 998362274, now seen corresponding path program 173 times [2020-11-11 15:15:01,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:01,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090240427] [2020-11-11 15:15:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090240427] [2020-11-11 15:15:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067502439] [2020-11-11 15:15:02,162 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:02,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:02,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:02,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:02,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:02,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:02,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:02,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:02,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339367909] [2020-11-11 15:15:02,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:02,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:02,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:02,349 INFO L87 Difference]: Start difference. First operand 2452 states and 6676 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:03,527 INFO L93 Difference]: Finished difference Result 3945 states and 9840 transitions. [2020-11-11 15:15:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:15:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:03,533 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:03,533 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:03,534 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:15:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2502. [2020-11-11 15:15:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7293082766893244) internal successors, (6826), 2501 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6826 transitions. [2020-11-11 15:15:03,570 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6826 transitions. Word has length 121 [2020-11-11 15:15:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:03,570 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6826 transitions. [2020-11-11 15:15:03,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6826 transitions. [2020-11-11 15:15:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:03,572 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:03,573 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:03,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:03,773 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:03,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1108891120, now seen corresponding path program 174 times [2020-11-11 15:15:03,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:03,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017178277] [2020-11-11 15:15:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:04,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017178277] [2020-11-11 15:15:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003320034] [2020-11-11 15:15:04,176 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:04,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:15:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:04,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:04,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:04,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:04,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811741682] [2020-11-11 15:15:04,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:04,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:04,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:04,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:04,363 INFO L87 Difference]: Start difference. First operand 2502 states and 6826 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:05,432 INFO L93 Difference]: Finished difference Result 3945 states and 9890 transitions. [2020-11-11 15:15:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:15:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:05,438 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:05,438 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:05,439 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:15:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2552. [2020-11-11 15:15:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7346138769110153) internal successors, (6976), 2551 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6976 transitions. [2020-11-11 15:15:05,477 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6976 transitions. Word has length 121 [2020-11-11 15:15:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:05,478 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6976 transitions. [2020-11-11 15:15:05,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6976 transitions. [2020-11-11 15:15:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:05,480 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:05,480 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:05,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:05,681 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:05,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1122787616, now seen corresponding path program 175 times [2020-11-11 15:15:05,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:05,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526747678] [2020-11-11 15:15:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526747678] [2020-11-11 15:15:06,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613656861] [2020-11-11 15:15:06,146 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:06,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:06,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:06,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635080949] [2020-11-11 15:15:06,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:06,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:06,334 INFO L87 Difference]: Start difference. First operand 2552 states and 6976 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:07,637 INFO L93 Difference]: Finished difference Result 3945 states and 9940 transitions. [2020-11-11 15:15:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:07,642 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:07,642 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:07,643 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2602. [2020-11-11 15:15:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.7397154940407535) internal successors, (7126), 2601 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7126 transitions. [2020-11-11 15:15:07,678 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7126 transitions. Word has length 121 [2020-11-11 15:15:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:07,678 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7126 transitions. [2020-11-11 15:15:07,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7126 transitions. [2020-11-11 15:15:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:07,680 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:07,680 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:07,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:07,881 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1560751698, now seen corresponding path program 176 times [2020-11-11 15:15:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:07,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129615376] [2020-11-11 15:15:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129615376] [2020-11-11 15:15:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429399405] [2020-11-11 15:15:08,278 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:08,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:08,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:08,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:08,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:08,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:08,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221776257] [2020-11-11 15:15:08,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:08,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:08,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:08,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:08,437 INFO L87 Difference]: Start difference. First operand 2602 states and 7126 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:09,591 INFO L93 Difference]: Finished difference Result 3945 states and 9990 transitions. [2020-11-11 15:15:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:15:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:09,597 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:09,597 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:09,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2652. [2020-11-11 15:15:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.7446246699358734) internal successors, (7276), 2651 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7276 transitions. [2020-11-11 15:15:09,636 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7276 transitions. Word has length 121 [2020-11-11 15:15:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:09,636 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7276 transitions. [2020-11-11 15:15:09,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7276 transitions. [2020-11-11 15:15:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:09,638 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:09,638 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:09,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:09,839 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1188923038, now seen corresponding path program 177 times [2020-11-11 15:15:09,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:09,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647178049] [2020-11-11 15:15:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:10,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647178049] [2020-11-11 15:15:10,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213628052] [2020-11-11 15:15:10,260 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:10,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:15:10,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-11 15:15:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:10,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:10,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:10,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:10,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799177005] [2020-11-11 15:15:10,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:10,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:10,437 INFO L87 Difference]: Start difference. First operand 2652 states and 7276 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:11,858 INFO L93 Difference]: Finished difference Result 3945 states and 10040 transitions. [2020-11-11 15:15:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:15:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:11,864 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:11,864 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:11,864 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=812, Invalid=2728, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:15:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2702. [2020-11-11 15:15:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.7493520918178453) internal successors, (7426), 2701 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7426 transitions. [2020-11-11 15:15:11,898 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7426 transitions. Word has length 121 [2020-11-11 15:15:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:11,898 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7426 transitions. [2020-11-11 15:15:11,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7426 transitions. [2020-11-11 15:15:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:11,900 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:11,900 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:12,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-11-11 15:15:12,101 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:12,102 INFO L82 PathProgramCache]: Analyzing trace with hash 621757164, now seen corresponding path program 178 times [2020-11-11 15:15:12,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:12,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020358653] [2020-11-11 15:15:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020358653] [2020-11-11 15:15:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603122566] [2020-11-11 15:15:12,550 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:12,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:15:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:12,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:12,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:12,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:12,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528404102] [2020-11-11 15:15:12,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:12,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:12,705 INFO L87 Difference]: Start difference. First operand 2702 states and 7426 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:13,956 INFO L93 Difference]: Finished difference Result 3945 states and 10090 transitions. [2020-11-11 15:15:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:15:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:13,962 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:13,962 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:13,963 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:15:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2752. [2020-11-11 15:15:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7539076699382044) internal successors, (7576), 2751 states have internal predecessors, (7576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7576 transitions. [2020-11-11 15:15:14,021 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7576 transitions. Word has length 121 [2020-11-11 15:15:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:14,021 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7576 transitions. [2020-11-11 15:15:14,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7576 transitions. [2020-11-11 15:15:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:14,023 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:14,023 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:14,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-11-11 15:15:14,226 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1450468316, now seen corresponding path program 179 times [2020-11-11 15:15:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:14,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144914242] [2020-11-11 15:15:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:14,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144914242] [2020-11-11 15:15:14,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869209075] [2020-11-11 15:15:14,639 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:14,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:14,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:14,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:14,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:14,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:14,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:14,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29057687] [2020-11-11 15:15:14,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:14,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:14,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:14,808 INFO L87 Difference]: Start difference. First operand 2752 states and 7576 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:16,368 INFO L93 Difference]: Finished difference Result 3945 states and 10140 transitions. [2020-11-11 15:15:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:15:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:16,375 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:16,375 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:16,375 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:15:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2802. [2020-11-11 15:15:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.758300606926098) internal successors, (7726), 2801 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7726 transitions. [2020-11-11 15:15:16,417 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7726 transitions. Word has length 121 [2020-11-11 15:15:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:16,417 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7726 transitions. [2020-11-11 15:15:16,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7726 transitions. [2020-11-11 15:15:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:16,421 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:16,421 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:16,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-11-11 15:15:16,626 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:16,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:16,626 INFO L82 PathProgramCache]: Analyzing trace with hash -272070230, now seen corresponding path program 180 times [2020-11-11 15:15:16,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:16,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103402551] [2020-11-11 15:15:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103402551] [2020-11-11 15:15:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428026472] [2020-11-11 15:15:17,000 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:17,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:15:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:15:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:17,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:17,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:17,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:17,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376636669] [2020-11-11 15:15:17,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:17,240 INFO L87 Difference]: Start difference. First operand 2802 states and 7726 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:18,626 INFO L93 Difference]: Finished difference Result 3945 states and 10190 transitions. [2020-11-11 15:15:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:15:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:18,633 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:18,633 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:18,633 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:15:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2852. [2020-11-11 15:15:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7625394598386532) internal successors, (7876), 2851 states have internal predecessors, (7876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7876 transitions. [2020-11-11 15:15:18,674 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7876 transitions. Word has length 121 [2020-11-11 15:15:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:18,675 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7876 transitions. [2020-11-11 15:15:18,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7876 transitions. [2020-11-11 15:15:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:18,677 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:18,677 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:18,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:18,878 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1811605862, now seen corresponding path program 181 times [2020-11-11 15:15:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:18,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509085382] [2020-11-11 15:15:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:19,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509085382] [2020-11-11 15:15:19,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783727470] [2020-11-11 15:15:19,273 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:19,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:19,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:19,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:19,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:19,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766501411] [2020-11-11 15:15:19,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:19,437 INFO L87 Difference]: Start difference. First operand 2852 states and 7876 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:21,191 INFO L93 Difference]: Finished difference Result 3945 states and 10240 transitions. [2020-11-11 15:15:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:15:21,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:21,197 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:21,197 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:21,198 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1031, Invalid=3001, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:15:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2902. [2020-11-11 15:15:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7666321957945534) internal successors, (8026), 2901 states have internal predecessors, (8026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 8026 transitions. [2020-11-11 15:15:21,238 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 8026 transitions. Word has length 121 [2020-11-11 15:15:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:21,239 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 8026 transitions. [2020-11-11 15:15:21,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 8026 transitions. [2020-11-11 15:15:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:21,241 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:21,241 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:21,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:21,442 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1126794728, now seen corresponding path program 182 times [2020-11-11 15:15:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:21,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619936147] [2020-11-11 15:15:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:21,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619936147] [2020-11-11 15:15:21,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182464387] [2020-11-11 15:15:21,890 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:21,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:21,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:21,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:22,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:22,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:22,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:22,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032688113] [2020-11-11 15:15:22,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:22,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:22,036 INFO L87 Difference]: Start difference. First operand 2902 states and 8026 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:23,458 INFO L93 Difference]: Finished difference Result 3945 states and 10290 transitions. [2020-11-11 15:15:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:15:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:23,465 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:23,465 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:23,465 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:15:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2952. [2020-11-11 15:15:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.7705862419518805) internal successors, (8176), 2951 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8176 transitions. [2020-11-11 15:15:23,508 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8176 transitions. Word has length 121 [2020-11-11 15:15:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:23,508 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8176 transitions. [2020-11-11 15:15:23,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8176 transitions. [2020-11-11 15:15:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:23,511 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:23,511 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:23,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-11-11 15:15:23,711 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1336639784, now seen corresponding path program 183 times [2020-11-11 15:15:23,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:23,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223909265] [2020-11-11 15:15:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:24,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223909265] [2020-11-11 15:15:24,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961485368] [2020-11-11 15:15:24,186 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:24,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:15:24,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:15:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:24,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:24,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:24,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026478553] [2020-11-11 15:15:24,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:24,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:24,398 INFO L87 Difference]: Start difference. First operand 2952 states and 8176 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:26,189 INFO L93 Difference]: Finished difference Result 3990 states and 10460 transitions. [2020-11-11 15:15:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:15:26,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:26,195 INFO L225 Difference]: With dead ends: 3990 [2020-11-11 15:15:26,195 INFO L226 Difference]: Without dead ends: 3720 [2020-11-11 15:15:26,196 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1061, Invalid=3229, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:15:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2020-11-11 15:15:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3002. [2020-11-11 15:15:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.7794068643785406) internal successors, (8341), 3001 states have internal predecessors, (8341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8341 transitions. [2020-11-11 15:15:26,240 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8341 transitions. Word has length 121 [2020-11-11 15:15:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:26,240 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8341 transitions. [2020-11-11 15:15:26,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8341 transitions. [2020-11-11 15:15:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:26,243 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:26,243 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:26,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:26,444 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash -707848282, now seen corresponding path program 184 times [2020-11-11 15:15:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:26,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239662987] [2020-11-11 15:15:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239662987] [2020-11-11 15:15:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84517635] [2020-11-11 15:15:26,824 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:26,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:26,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:15:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:26,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:26,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:26,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010985194] [2020-11-11 15:15:26,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:26,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:26,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:26,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:26,965 INFO L87 Difference]: Start difference. First operand 3002 states and 8341 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:28,549 INFO L93 Difference]: Finished difference Result 5052 states and 13544 transitions. [2020-11-11 15:15:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:15:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:28,556 INFO L225 Difference]: With dead ends: 5052 [2020-11-11 15:15:28,556 INFO L226 Difference]: Without dead ends: 4782 [2020-11-11 15:15:28,557 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:15:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2020-11-11 15:15:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 3127. [2020-11-11 15:15:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3126 states have (on average 2.7933461292386434) internal successors, (8732), 3126 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 8732 transitions. [2020-11-11 15:15:28,604 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 8732 transitions. Word has length 121 [2020-11-11 15:15:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:28,604 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 8732 transitions. [2020-11-11 15:15:28,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 8732 transitions. [2020-11-11 15:15:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:28,607 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:28,607 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:28,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-11-11 15:15:28,808 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359672, now seen corresponding path program 185 times [2020-11-11 15:15:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:28,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004075420] [2020-11-11 15:15:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:29,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004075420] [2020-11-11 15:15:29,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768689535] [2020-11-11 15:15:29,196 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:29,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:29,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:29,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:29,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:29,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:29,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:29,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:29,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650335991] [2020-11-11 15:15:29,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:29,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:29,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:29,346 INFO L87 Difference]: Start difference. First operand 3127 states and 8732 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:31,213 INFO L93 Difference]: Finished difference Result 4066 states and 10850 transitions. [2020-11-11 15:15:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:15:31,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 121 [2020-11-11 15:15:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:31,219 INFO L225 Difference]: With dead ends: 4066 [2020-11-11 15:15:31,219 INFO L226 Difference]: Without dead ends: 3655 [2020-11-11 15:15:31,220 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 15:15:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2020-11-11 15:15:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2141. [2020-11-11 15:15:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.695327102803738) internal successors, (5768), 2140 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5768 transitions. [2020-11-11 15:15:31,248 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5768 transitions. Word has length 121 [2020-11-11 15:15:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:31,248 INFO L481 AbstractCegarLoop]: Abstraction has 2141 states and 5768 transitions. [2020-11-11 15:15:31,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5768 transitions. [2020-11-11 15:15:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:15:31,249 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:31,250 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:31,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:31,450 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash 473182784, now seen corresponding path program 186 times [2020-11-11 15:15:31,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:31,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688881899] [2020-11-11 15:15:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-11 15:15:31,461 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-11 15:15:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-11 15:15:31,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-11 15:15:31,545 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-11 15:15:31,545 INFO L595 BasicCegarLoop]: Counterexample might be feasible [2020-11-11 15:15:31,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2020-11-11 15:15:31,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 03:15:31 BasicIcfg [2020-11-11 15:15:31,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 15:15:31,722 INFO L168 Benchmark]: Toolchain (without parser) took 265729.17 ms. Allocated memory was 314.6 MB in the beginning and 859.8 MB in the end (delta: 545.3 MB). Free memory was 288.8 MB in the beginning and 700.5 MB in the end (delta: -411.7 MB). Peak memory consumption was 135.3 MB. Max. memory is 16.0 GB. [2020-11-11 15:15:31,723 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 314.6 MB. Free memory is still 285.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:15:31,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 840.63 ms. Allocated memory is still 314.6 MB. Free memory was 288.1 MB in the beginning and 291.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.0 GB. [2020-11-11 15:15:31,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.81 ms. Allocated memory is still 314.6 MB. Free memory was 291.5 MB in the beginning and 289.4 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:15:31,724 INFO L168 Benchmark]: Boogie Preprocessor took 53.53 ms. Allocated memory is still 314.6 MB. Free memory was 289.4 MB in the beginning and 288.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:15:31,725 INFO L168 Benchmark]: RCFGBuilder took 537.52 ms. Allocated memory is still 314.6 MB. Free memory was 288.1 MB in the beginning and 266.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-11 15:15:31,725 INFO L168 Benchmark]: TraceAbstraction took 264190.65 ms. Allocated memory was 314.6 MB in the beginning and 859.8 MB in the end (delta: 545.3 MB). Free memory was 265.2 MB in the beginning and 700.5 MB in the end (delta: -435.3 MB). Peak memory consumption was 110.0 MB. Max. memory is 16.0 GB. [2020-11-11 15:15:31,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 314.6 MB. Free memory is still 285.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 840.63 ms. Allocated memory is still 314.6 MB. Free memory was 288.1 MB in the beginning and 291.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 83.81 ms. Allocated memory is still 314.6 MB. Free memory was 291.5 MB in the beginning and 289.4 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 53.53 ms. Allocated memory is still 314.6 MB. Free memory was 289.4 MB in the beginning and 288.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 537.52 ms. Allocated memory is still 314.6 MB. Free memory was 288.1 MB in the beginning and 266.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 264190.65 ms. Allocated memory was 314.6 MB in the beginning and 859.8 MB in the end (delta: 545.3 MB). Free memory was 265.2 MB in the beginning and 700.5 MB in the end (delta: -435.3 MB). Peak memory consumption was 110.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; VAL [i=3, j=6] [L704] 0 pthread_t id1, id2; VAL [i=3, j=6] [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L708] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1, k++=1] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5, k++=5] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6, k++=6] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6, k++=6] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8, k++=7] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8, k++=7] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9, k++=8] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9, k++=8] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L711] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L713] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L685] COND FALSE 0 !(0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L685] 0 __assert_fail ("0", "triangular-longer-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 263.8s, OverallIterations: 199, TraceHistogramMax: 10, AutomataDifference: 143.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 17934 SDtfs, 130010 SDslu, 153913 SDs, 0 SdLazy, 29309 SolverSat, 20084 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25096 GetRequests, 17115 SyntacticMatches, 175 SemanticMatches, 7806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82018 ImplicationChecksByTransitivity, 142.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3127occurred in iteration=197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.0s AutomataMinimizationTime, 198 MinimizatonAttempts, 162307 StatesRemovedByMinimization, 198 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 56.6s InterpolantComputationTime, 35004 NumberOfCodeBlocks, 35004 NumberOfCodeBlocksAsserted, 1046 NumberOfCheckSat, 34490 ConstructedInterpolants, 0 QuantifiedInterpolants, 13630552 SizeOfPredicates, 3079 NumberOfNonLiveVariables, 36504 ConjunctsInSsa, 3844 ConjunctsInUnsatCore, 388 InterpolantComputations, 8 PerfectInterpolantSequences, 8/65312 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...