/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:41:09,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:41:09,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:41:09,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:41:09,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:41:09,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:41:09,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:41:09,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:41:09,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:41:09,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:41:09,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:41:09,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:41:09,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:41:09,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:41:09,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:41:09,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:41:09,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:41:09,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:41:09,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:41:09,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:41:09,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:41:09,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:41:09,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:41:09,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:41:09,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:41:09,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:41:09,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:41:09,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:41:09,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:41:09,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:41:09,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:41:09,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:41:09,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:41:09,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:41:09,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:41:09,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:41:09,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:41:09,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:41:09,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:41:09,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:41:09,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:41:09,429 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:41:09,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:41:09,429 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:41:09,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:41:09,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:41:09,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:41:09,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:41:09,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:41:09,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:41:09,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:41:09,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:41:09,434 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:41:09,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:41:09,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:41:09,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:41:09,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:41:09,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:41:09,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:09,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:41:09,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:41:09,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:41:09,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:41:09,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:41:09,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:41:09,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:41:09,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:41:09,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:41:09,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:41:09,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:41:09,748 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:41:09,748 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:41:09,749 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-18 11:41:09,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac4a58ce7/fafcb2a9318c4007a1ec853b51ff20c8/FLAG9c785d37e [2019-12-18 11:41:10,309 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:41:10,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-18 11:41:10,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac4a58ce7/fafcb2a9318c4007a1ec853b51ff20c8/FLAG9c785d37e [2019-12-18 11:41:10,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac4a58ce7/fafcb2a9318c4007a1ec853b51ff20c8 [2019-12-18 11:41:10,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:41:10,682 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:41:10,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:10,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:41:10,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:41:10,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419b8acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:10, skipping insertion in model container [2019-12-18 11:41:10,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:41:10,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:41:11,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,335 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:41:11,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,470 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:41:11,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11 WrapperNode [2019-12-18 11:41:11,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:11,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:41:11,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:41:11,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:41:11,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:41:11,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:41:11,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:41:11,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:41:11,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (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 [2019-12-18 11:41:11,627 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:41:11,627 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:41:11,627 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:41:11,627 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:41:11,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:41:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:41:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:41:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:41:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:41:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:41:11,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:41:11,630 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:41:11,992 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:41:11,993 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:41:11,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:11 BoogieIcfgContainer [2019-12-18 11:41:11,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:41:11,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:41:11,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:41:11,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:41:11,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:41:10" (1/3) ... [2019-12-18 11:41:12,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9a8b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (2/3) ... [2019-12-18 11:41:12,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9a8b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:11" (3/3) ... [2019-12-18 11:41:12,003 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-18 11:41:12,012 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:41:12,012 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:41:12,019 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:41:12,020 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:41:12,046 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,046 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,046 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,046 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,047 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,047 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,047 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,047 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,048 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,048 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,048 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,048 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,049 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,049 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,049 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,049 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,050 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,050 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,050 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,051 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,051 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,051 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,051 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,052 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,052 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,052 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,052 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,053 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,053 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,053 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,057 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,058 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,058 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,058 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,058 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,059 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,066 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,066 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,067 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,067 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,067 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,068 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,083 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:41:12,100 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:41:12,100 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:41:12,100 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:41:12,101 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:41:12,101 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:41:12,101 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:41:12,101 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:41:12,102 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:41:12,115 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 11:41:12,117 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,158 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,158 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,167 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,170 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,196 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,196 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,198 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,200 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 11:41:12,203 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:41:13,449 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 11:41:13,576 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 11:41:13,577 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 11:41:13,580 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:41:13,588 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:41:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:41:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:41:13,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,598 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:41:13,599 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 11:41:13,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176130694] [2019-12-18 11:41:13,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:13,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176130694] [2019-12-18 11:41:13,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:13,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:41:13,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308140349] [2019-12-18 11:41:13,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:41:13,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:41:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:13,844 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:41:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:13,883 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 11:41:13,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:41:13,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:41:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:13,898 INFO L225 Difference]: With dead ends: 54 [2019-12-18 11:41:13,898 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:41:13,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:41:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:41:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:41:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 11:41:13,941 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 11:41:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:13,942 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 11:41:13,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:41:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 11:41:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:13,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,943 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:13,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 11:41:13,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37718911] [2019-12-18 11:41:13,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37718911] [2019-12-18 11:41:14,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083077881] [2019-12-18 11:41:14,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,087 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 11:41:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,112 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 11:41:14,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,114 INFO L225 Difference]: With dead ends: 42 [2019-12-18 11:41:14,115 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 11:41:14,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 11:41:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 11:41:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 11:41:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 11:41:14,123 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 11:41:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,124 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 11:41:14,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 11:41:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,125 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,125 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,125 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 11:41:14,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268911232] [2019-12-18 11:41:14,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268911232] [2019-12-18 11:41:14,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336495425] [2019-12-18 11:41:14,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,202 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 11:41:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,222 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 11:41:14,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,225 INFO L225 Difference]: With dead ends: 51 [2019-12-18 11:41:14,225 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 11:41:14,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 11:41:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 11:41:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 11:41:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 11:41:14,237 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 11:41:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,237 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 11:41:14,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 11:41:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,238 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,238 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,239 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 11:41:14,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730051289] [2019-12-18 11:41:14,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730051289] [2019-12-18 11:41:14,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640570411] [2019-12-18 11:41:14,321 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542061008] [2019-12-18 11:41:14,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,458 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 11:41:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,491 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 11:41:14,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,493 INFO L225 Difference]: With dead ends: 56 [2019-12-18 11:41:14,493 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 11:41:14,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 11:41:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 11:41:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 11:41:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 11:41:14,501 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 11:41:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,502 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 11:41:14,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 11:41:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,503 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,503 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,716 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 11:41:14,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836851313] [2019-12-18 11:41:14,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836851313] [2019-12-18 11:41:14,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988001937] [2019-12-18 11:41:14,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:14,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267550602] [2019-12-18 11:41:14,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,911 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 11:41:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,966 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 11:41:14,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,968 INFO L225 Difference]: With dead ends: 63 [2019-12-18 11:41:14,968 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 11:41:14,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 11:41:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 11:41:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 11:41:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 11:41:14,976 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 11:41:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,976 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 11:41:14,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 11:41:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:14,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,978 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,179 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 11:41:15,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803495598] [2019-12-18 11:41:15,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803495598] [2019-12-18 11:41:15,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034290340] [2019-12-18 11:41:15,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:15,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:15,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:15,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806432434] [2019-12-18 11:41:15,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:15,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,373 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 11:41:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,405 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 11:41:15,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:15,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,407 INFO L225 Difference]: With dead ends: 66 [2019-12-18 11:41:15,407 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 11:41:15,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 11:41:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 11:41:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 11:41:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 11:41:15,427 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 11:41:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,427 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 11:41:15,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 11:41:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,428 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,631 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 11:41:15,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819019780] [2019-12-18 11:41:15,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819019780] [2019-12-18 11:41:15,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:15,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:15,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104953616] [2019-12-18 11:41:15,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:15,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,721 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 11:41:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,739 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 11:41:15,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,743 INFO L225 Difference]: With dead ends: 68 [2019-12-18 11:41:15,743 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 11:41:15,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 11:41:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 11:41:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 11:41:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 11:41:15,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 11:41:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,757 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 11:41:15,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 11:41:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,758 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,758 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,758 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,759 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 11:41:15,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643655645] [2019-12-18 11:41:15,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643655645] [2019-12-18 11:41:15,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:15,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:15,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078588898] [2019-12-18 11:41:15,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:15,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,838 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 11:41:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,871 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-18 11:41:15,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,872 INFO L225 Difference]: With dead ends: 69 [2019-12-18 11:41:15,872 INFO L226 Difference]: Without dead ends: 68 [2019-12-18 11:41:15,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-18 11:41:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-18 11:41:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-18 11:41:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 11:41:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 11:41:15,878 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 11:41:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,879 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 11:41:15,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 11:41:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,880 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,880 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 11:41:15,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575819172] [2019-12-18 11:41:15,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575819172] [2019-12-18 11:41:15,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877896870] [2019-12-18 11:41:15,960 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:16,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:16,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:16,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919455769] [2019-12-18 11:41:16,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:16,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:16,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:16,086 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 11:41:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,184 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 11:41:16,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:16,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,185 INFO L225 Difference]: With dead ends: 77 [2019-12-18 11:41:16,186 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 11:41:16,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 11:41:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 11:41:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 11:41:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 11:41:16,192 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 11:41:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,192 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 11:41:16,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 11:41:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,194 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,194 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,398 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,399 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 11:41:16,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616447125] [2019-12-18 11:41:16,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616447125] [2019-12-18 11:41:16,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388366395] [2019-12-18 11:41:16,474 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:16,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:16,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:16,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489615203] [2019-12-18 11:41:16,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:16,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:16,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,621 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 11:41:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,653 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 11:41:16,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:16,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,655 INFO L225 Difference]: With dead ends: 80 [2019-12-18 11:41:16,655 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 11:41:16,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 11:41:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 11:41:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:16,661 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,661 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:16,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,663 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,867 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 11:41:16,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953908003] [2019-12-18 11:41:16,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953908003] [2019-12-18 11:41:16,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705377989] [2019-12-18 11:41:16,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:16,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396917398] [2019-12-18 11:41:17,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,068 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,143 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-18 11:41:17,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,145 INFO L225 Difference]: With dead ends: 81 [2019-12-18 11:41:17,145 INFO L226 Difference]: Without dead ends: 80 [2019-12-18 11:41:17,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-18 11:41:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-18 11:41:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:17,151 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,151 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:17,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,152 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,356 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 11:41:17,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607384879] [2019-12-18 11:41:17,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607384879] [2019-12-18 11:41:17,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053192445] [2019-12-18 11:41:17,424 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:17,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:17,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38717698] [2019-12-18 11:41:17,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,548 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,629 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 11:41:17,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,631 INFO L225 Difference]: With dead ends: 85 [2019-12-18 11:41:17,631 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 11:41:17,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 11:41:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-18 11:41:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:17,639 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,640 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:17,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,643 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,643 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,844 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 11:41:17,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555394777] [2019-12-18 11:41:17,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555394777] [2019-12-18 11:41:17,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388981576] [2019-12-18 11:41:17,915 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,977 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:17,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,980 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743350313] [2019-12-18 11:41:18,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,144 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,414 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-18 11:41:18,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:18,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,415 INFO L225 Difference]: With dead ends: 86 [2019-12-18 11:41:18,415 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 11:41:18,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 11:41:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 11:41:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:18,424 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,424 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:18,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,425 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,630 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-18 11:41:18,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192079967] [2019-12-18 11:41:18,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192079967] [2019-12-18 11:41:18,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466548209] [2019-12-18 11:41:18,717 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,792 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:18,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12137889] [2019-12-18 11:41:18,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,854 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,972 INFO L93 Difference]: Finished difference Result 89 states and 185 transitions. [2019-12-18 11:41:18,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:18,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,974 INFO L225 Difference]: With dead ends: 89 [2019-12-18 11:41:18,974 INFO L226 Difference]: Without dead ends: 88 [2019-12-18 11:41:18,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-18 11:41:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2019-12-18 11:41:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:18,986 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,986 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:18,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,989 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,989 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,193 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-18 11:41:19,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953242746] [2019-12-18 11:41:19,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953242746] [2019-12-18 11:41:19,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623455042] [2019-12-18 11:41:19,249 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193034051] [2019-12-18 11:41:19,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,370 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,483 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 11:41:19,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:19,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,485 INFO L225 Difference]: With dead ends: 88 [2019-12-18 11:41:19,485 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 11:41:19,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 11:41:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-18 11:41:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:19,490 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,490 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:19,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,491 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,491 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,700 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-18 11:41:19,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426286463] [2019-12-18 11:41:19,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426286463] [2019-12-18 11:41:19,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092783736] [2019-12-18 11:41:19,752 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:19,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:19,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:19,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579522656] [2019-12-18 11:41:19,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,855 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,967 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-18 11:41:19,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:19,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,969 INFO L225 Difference]: With dead ends: 87 [2019-12-18 11:41:19,969 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 11:41:19,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 11:41:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-18 11:41:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 11:41:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 11:41:19,975 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 11:41:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,975 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 11:41:19,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 11:41:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,976 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,976 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,180 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 11:41:20,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859584375] [2019-12-18 11:41:20,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859584375] [2019-12-18 11:41:20,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534012311] [2019-12-18 11:41:20,267 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:20,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:20,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:20,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822900961] [2019-12-18 11:41:20,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:20,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:20,391 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 11:41:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,493 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 11:41:20,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:20,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,495 INFO L225 Difference]: With dead ends: 92 [2019-12-18 11:41:20,495 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 11:41:20,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 11:41:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 11:41:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 11:41:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 11:41:20,499 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 11:41:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,499 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 11:41:20,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 11:41:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,500 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,500 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,708 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 11:41:20,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176704651] [2019-12-18 11:41:20,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176704651] [2019-12-18 11:41:20,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83079111] [2019-12-18 11:41:20,802 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:20,863 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:20,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:20,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014316121] [2019-12-18 11:41:20,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:20,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,966 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 11:41:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,004 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 11:41:21,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:21,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,006 INFO L225 Difference]: With dead ends: 95 [2019-12-18 11:41:21,006 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 11:41:21,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 11:41:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 11:41:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,011 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,011 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,012 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,012 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,216 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-18 11:41:21,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989884248] [2019-12-18 11:41:21,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989884248] [2019-12-18 11:41:21,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466040189] [2019-12-18 11:41:21,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:21,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296078203] [2019-12-18 11:41:21,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,469 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,562 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-18 11:41:21,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,564 INFO L225 Difference]: With dead ends: 98 [2019-12-18 11:41:21,564 INFO L226 Difference]: Without dead ends: 97 [2019-12-18 11:41:21,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-18 11:41:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-18 11:41:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,568 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,568 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,569 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,773 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-18 11:41:21,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138293428] [2019-12-18 11:41:21,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138293428] [2019-12-18 11:41:21,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141480667] [2019-12-18 11:41:21,830 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,887 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:21,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978836507] [2019-12-18 11:41:21,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,981 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,075 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-18 11:41:22,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:22,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,081 INFO L225 Difference]: With dead ends: 101 [2019-12-18 11:41:22,081 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 11:41:22,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 11:41:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-18 11:41:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:22,085 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,085 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:22,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,086 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,086 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,289 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-18 11:41:22,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949211304] [2019-12-18 11:41:22,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949211304] [2019-12-18 11:41:22,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082972616] [2019-12-18 11:41:22,345 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:22,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432716520] [2019-12-18 11:41:22,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,509 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,686 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-18 11:41:22,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:22,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,688 INFO L225 Difference]: With dead ends: 105 [2019-12-18 11:41:22,688 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 11:41:22,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 11:41:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-18 11:41:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:22,693 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,693 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:22,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,694 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,694 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,904 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-18 11:41:22,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811762940] [2019-12-18 11:41:22,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811762940] [2019-12-18 11:41:22,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676636062] [2019-12-18 11:41:22,977 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:23,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:23,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907240710] [2019-12-18 11:41:23,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,087 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,176 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-18 11:41:23,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:23,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,178 INFO L225 Difference]: With dead ends: 103 [2019-12-18 11:41:23,179 INFO L226 Difference]: Without dead ends: 102 [2019-12-18 11:41:23,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-18 11:41:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-18 11:41:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:23,184 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,184 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:23,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,185 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,185 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,386 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-18 11:41:23,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943214308] [2019-12-18 11:41:23,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943214308] [2019-12-18 11:41:23,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955053747] [2019-12-18 11:41:23,465 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421632460] [2019-12-18 11:41:23,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,574 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,721 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-18 11:41:23,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:23,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,722 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:23,722 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:23,723 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-18 11:41:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:23,727 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,727 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:23,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,728 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,931 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-18 11:41:23,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816763449] [2019-12-18 11:41:23,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816763449] [2019-12-18 11:41:23,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914629714] [2019-12-18 11:41:23,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:24,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588101658] [2019-12-18 11:41:24,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,103 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,245 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:24,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:24,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,246 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:24,246 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:24,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-18 11:41:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,250 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,250 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,251 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,455 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-18 11:41:24,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359100515] [2019-12-18 11:41:24,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359100515] [2019-12-18 11:41:24,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016076539] [2019-12-18 11:41:24,507 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:24,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008439772] [2019-12-18 11:41:24,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,663 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,793 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-18 11:41:24,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:24,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,795 INFO L225 Difference]: With dead ends: 106 [2019-12-18 11:41:24,795 INFO L226 Difference]: Without dead ends: 105 [2019-12-18 11:41:24,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-18 11:41:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-18 11:41:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,800 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,800 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,801 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,005 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-18 11:41:25,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529742237] [2019-12-18 11:41:25,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529742237] [2019-12-18 11:41:25,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471826429] [2019-12-18 11:41:25,067 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,108 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:25,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736544719] [2019-12-18 11:41:25,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,191 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,464 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:25,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:25,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,465 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:25,465 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:25,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-18 11:41:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:25,469 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,469 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:25,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:25,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,470 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,671 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-18 11:41:25,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504782615] [2019-12-18 11:41:25,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504782615] [2019-12-18 11:41:25,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367550884] [2019-12-18 11:41:25,740 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:25,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159762632] [2019-12-18 11:41:25,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,863 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,074 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:26,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:26,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,076 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:26,076 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:26,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-18 11:41:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:26,081 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,082 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:26,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,082 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,285 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-18 11:41:26,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331479527] [2019-12-18 11:41:26,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331479527] [2019-12-18 11:41:26,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809275768] [2019-12-18 11:41:26,360 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,419 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:26,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:26,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:26,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479082443] [2019-12-18 11:41:26,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:26,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:26,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:26,519 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,764 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-18 11:41:26,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:26,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,766 INFO L225 Difference]: With dead ends: 111 [2019-12-18 11:41:26,766 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:26,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-18 11:41:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:26,769 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,770 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:26,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,770 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,971 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-18 11:41:26,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062742628] [2019-12-18 11:41:26,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062742628] [2019-12-18 11:41:27,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202004299] [2019-12-18 11:41:27,030 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,071 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719587889] [2019-12-18 11:41:27,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,138 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:27,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,319 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-18 11:41:27,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:27,320 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,321 INFO L225 Difference]: With dead ends: 109 [2019-12-18 11:41:27,321 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 11:41:27,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 11:41:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-18 11:41:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 11:41:27,324 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 11:41:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,325 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 11:41:27,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 11:41:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:27,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,326 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:27,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,529 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-18 11:41:27,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:27,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441417412] [2019-12-18 11:41:27,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441417412] [2019-12-18 11:41:27,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561523257] [2019-12-18 11:41:27,597 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:27,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:27,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:27,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563683252] [2019-12-18 11:41:27,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,734 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 11:41:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,047 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-18 11:41:28,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:28,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,048 INFO L225 Difference]: With dead ends: 116 [2019-12-18 11:41:28,049 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:28,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2019-12-18 11:41:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 11:41:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-18 11:41:28,054 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-18 11:41:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,055 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-18 11:41:28,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-18 11:41:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:28,055 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,056 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,260 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-18 11:41:28,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660169569] [2019-12-18 11:41:28,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660169569] [2019-12-18 11:41:28,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003434924] [2019-12-18 11:41:28,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:28,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:28,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:28,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553383166] [2019-12-18 11:41:28,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:28,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:28,410 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-18 11:41:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,573 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:28,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:28,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,574 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:28,575 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:28,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-18 11:41:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:28,580 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,581 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:28,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:28,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,582 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,785 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 11:41:28,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796945344] [2019-12-18 11:41:28,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796945344] [2019-12-18 11:41:28,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635886777] [2019-12-18 11:41:28,846 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,885 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:28,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:28,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557220400] [2019-12-18 11:41:28,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:28,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:28,948 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 11:41:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,074 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 11:41:29,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:29,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,076 INFO L225 Difference]: With dead ends: 107 [2019-12-18 11:41:29,076 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 11:41:29,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 11:41:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 11:41:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 11:41:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 11:41:29,081 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 11:41:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,081 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 11:41:29,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 11:41:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,082 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,283 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 11:41:29,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957323175] [2019-12-18 11:41:29,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957323175] [2019-12-18 11:41:29,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704516949] [2019-12-18 11:41:29,355 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:29,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:29,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:41:29,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 11:41:29,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530208216] [2019-12-18 11:41:29,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:29,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:29,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:29,472 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-18 11:41:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,496 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-18 11:41:29,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:29,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 11:41:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,498 INFO L225 Difference]: With dead ends: 124 [2019-12-18 11:41:29,498 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:29,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 11:41:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-18 11:41:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 11:41:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-18 11:41:29,505 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-18 11:41:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,506 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-18 11:41:29,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-18 11:41:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,507 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,710 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-18 11:41:29,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549931357] [2019-12-18 11:41:29,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549931357] [2019-12-18 11:41:29,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892440950] [2019-12-18 11:41:29,786 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:29,834 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:29,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:29,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:29,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:29,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031761028] [2019-12-18 11:41:29,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:29,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:29,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:29,918 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-18 11:41:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,070 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-18 11:41:30,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:30,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,071 INFO L225 Difference]: With dead ends: 133 [2019-12-18 11:41:30,071 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 11:41:30,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 11:41:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-18 11:41:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 11:41:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-18 11:41:30,074 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-18 11:41:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,075 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-18 11:41:30,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-18 11:41:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,075 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,276 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-18 11:41:30,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338000649] [2019-12-18 11:41:30,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338000649] [2019-12-18 11:41:30,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186992145] [2019-12-18 11:41:30,344 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:30,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:30,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:30,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:30,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752164089] [2019-12-18 11:41:30,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:30,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:30,475 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-18 11:41:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,609 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-18 11:41:30,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:30,609 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,611 INFO L225 Difference]: With dead ends: 140 [2019-12-18 11:41:30,611 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 11:41:30,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 11:41:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-18 11:41:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 11:41:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-18 11:41:30,616 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-18 11:41:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,617 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-18 11:41:30,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-18 11:41:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,618 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,821 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-18 11:41:30,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627537216] [2019-12-18 11:41:30,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627537216] [2019-12-18 11:41:30,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131817633] [2019-12-18 11:41:30,892 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:30,937 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:30,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634531555] [2019-12-18 11:41:31,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,083 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-18 11:41:31,682 WARN L192 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 11:41:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:31,712 INFO L93 Difference]: Finished difference Result 142 states and 323 transitions. [2019-12-18 11:41:31,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:31,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:31,714 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:31,714 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:31,714 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-12-18 11:41:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 11:41:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-18 11:41:31,718 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-18 11:41:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:31,718 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-18 11:41:31,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-18 11:41:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:31,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:31,719 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:31,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,923 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-18 11:41:31,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:31,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171781412] [2019-12-18 11:41:31,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171781412] [2019-12-18 11:41:31,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997822930] [2019-12-18 11:41:31,988 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343136150] [2019-12-18 11:41:32,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,112 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-18 11:41:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,240 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-18 11:41:32,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:32,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,247 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:32,247 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:32,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-18 11:41:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:41:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 11:41:32,252 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 11:41:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,252 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 11:41:32,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 11:41:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,266 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,267 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,470 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-18 11:41:32,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612122341] [2019-12-18 11:41:32,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612122341] [2019-12-18 11:41:32,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266749762] [2019-12-18 11:41:32,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:32,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:32,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:32,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848529689] [2019-12-18 11:41:32,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,742 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 11:41:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,988 INFO L93 Difference]: Finished difference Result 153 states and 349 transitions. [2019-12-18 11:41:32,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:32,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,990 INFO L225 Difference]: With dead ends: 153 [2019-12-18 11:41:32,990 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 11:41:32,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 11:41:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2019-12-18 11:41:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:41:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-18 11:41:32,994 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-18 11:41:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,995 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-18 11:41:32,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-18 11:41:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,995 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:33,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,199 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-18 11:41:33,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:33,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349145180] [2019-12-18 11:41:33,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349145180] [2019-12-18 11:41:33,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134328037] [2019-12-18 11:41:33,271 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:33,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:33,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:33,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:33,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:33,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:33,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330967821] [2019-12-18 11:41:33,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:33,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:33,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:33,501 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 14 states. [2019-12-18 11:41:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:34,318 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2019-12-18 11:41:34,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:34,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:34,320 INFO L225 Difference]: With dead ends: 158 [2019-12-18 11:41:34,320 INFO L226 Difference]: Without dead ends: 157 [2019-12-18 11:41:34,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-18 11:41:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2019-12-18 11:41:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:41:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 11:41:34,325 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 11:41:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:34,325 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 11:41:34,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 11:41:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:34,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:34,326 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,530 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-18 11:41:34,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798952581] [2019-12-18 11:41:34,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798952581] [2019-12-18 11:41:34,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658983826] [2019-12-18 11:41:34,596 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:34,643 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:34,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751200216] [2019-12-18 11:41:34,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:34,799 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 11:41:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:35,049 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2019-12-18 11:41:35,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:35,050 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:35,051 INFO L225 Difference]: With dead ends: 146 [2019-12-18 11:41:35,051 INFO L226 Difference]: Without dead ends: 145 [2019-12-18 11:41:35,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-18 11:41:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2019-12-18 11:41:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:41:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-18 11:41:35,055 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-18 11:41:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:35,055 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-18 11:41:35,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-18 11:41:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:35,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:35,056 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:35,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,257 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-18 11:41:35,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:35,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932118518] [2019-12-18 11:41:35,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932118518] [2019-12-18 11:41:35,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159857385] [2019-12-18 11:41:35,338 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:35,389 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:35,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:35,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:35,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:35,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:35,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514976270] [2019-12-18 11:41:35,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:35,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:35,466 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 14 states. [2019-12-18 11:41:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:35,580 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 11:41:35,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:35,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:35,581 INFO L225 Difference]: With dead ends: 143 [2019-12-18 11:41:35,581 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 11:41:35,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 11:41:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-18 11:41:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:41:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 11:41:35,586 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 11:41:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:35,586 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 11:41:35,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 11:41:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:35,587 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:35,587 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:35,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,790 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-18 11:41:35,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:35,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661233457] [2019-12-18 11:41:35,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661233457] [2019-12-18 11:41:35,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467795515] [2019-12-18 11:41:35,881 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:35,925 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:35,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:35,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:35,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:35,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:35,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:35,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885192249] [2019-12-18 11:41:35,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:35,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:35,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:35,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:35,998 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 11:41:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:36,192 INFO L93 Difference]: Finished difference Result 159 states and 361 transitions. [2019-12-18 11:41:36,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:36,192 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:36,193 INFO L225 Difference]: With dead ends: 159 [2019-12-18 11:41:36,193 INFO L226 Difference]: Without dead ends: 158 [2019-12-18 11:41:36,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-18 11:41:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2019-12-18 11:41:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-18 11:41:36,198 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-18 11:41:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:36,198 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-18 11:41:36,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-18 11:41:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:36,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:36,199 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:36,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,403 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-18 11:41:36,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:36,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501803787] [2019-12-18 11:41:36,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501803787] [2019-12-18 11:41:36,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469547745] [2019-12-18 11:41:36,473 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:36,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:36,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:36,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024980771] [2019-12-18 11:41:36,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:36,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:36,602 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-18 11:41:37,055 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:41:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,684 INFO L93 Difference]: Finished difference Result 170 states and 378 transitions. [2019-12-18 11:41:37,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:37,684 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,686 INFO L225 Difference]: With dead ends: 170 [2019-12-18 11:41:37,686 INFO L226 Difference]: Without dead ends: 169 [2019-12-18 11:41:37,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=298, Unknown=1, NotChecked=0, Total=462 [2019-12-18 11:41:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-18 11:41:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 125. [2019-12-18 11:41:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:41:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 11:41:37,691 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 11:41:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,691 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 11:41:37,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 11:41:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,692 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,895 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-18 11:41:37,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320319253] [2019-12-18 11:41:37,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320319253] [2019-12-18 11:41:37,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070499129] [2019-12-18 11:41:37,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:38,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:38,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036793595] [2019-12-18 11:41:38,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,105 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 11:41:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,359 INFO L93 Difference]: Finished difference Result 167 states and 376 transitions. [2019-12-18 11:41:38,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:38,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,361 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:41:38,361 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 11:41:38,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 11:41:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 11:41:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:38,367 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,368 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:38,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,368 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,572 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-18 11:41:38,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510844007] [2019-12-18 11:41:38,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510844007] [2019-12-18 11:41:38,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834426061] [2019-12-18 11:41:38,634 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:38,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:38,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041413159] [2019-12-18 11:41:38,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,754 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,962 INFO L93 Difference]: Finished difference Result 169 states and 380 transitions. [2019-12-18 11:41:38,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:38,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,963 INFO L225 Difference]: With dead ends: 169 [2019-12-18 11:41:38,963 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 11:41:38,964 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 11:41:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2019-12-18 11:41:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 11:41:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 11:41:38,967 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 11:41:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,968 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 11:41:38,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 11:41:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,968 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,969 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,172 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-18 11:41:39,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685565030] [2019-12-18 11:41:39,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685565030] [2019-12-18 11:41:39,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893397333] [2019-12-18 11:41:39,238 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:39,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:39,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391558160] [2019-12-18 11:41:39,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,363 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 11:41:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:39,562 INFO L93 Difference]: Finished difference Result 166 states and 380 transitions. [2019-12-18 11:41:39,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:39,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:39,564 INFO L225 Difference]: With dead ends: 166 [2019-12-18 11:41:39,565 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 11:41:39,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 11:41:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 11:41:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:39,570 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:39,570 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:39,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:39,571 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:39,571 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,774 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-18 11:41:39,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428930398] [2019-12-18 11:41:39,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428930398] [2019-12-18 11:41:39,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594071476] [2019-12-18 11:41:39,833 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:39,874 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:39,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291603879] [2019-12-18 11:41:39,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,965 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,190 INFO L93 Difference]: Finished difference Result 163 states and 371 transitions. [2019-12-18 11:41:40,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:40,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,192 INFO L225 Difference]: With dead ends: 163 [2019-12-18 11:41:40,192 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 11:41:40,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 11:41:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2019-12-18 11:41:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 11:41:40,197 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 11:41:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,197 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 11:41:40,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 11:41:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,198 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,198 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:40,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:40,401 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-18 11:41:40,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:40,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974718598] [2019-12-18 11:41:40,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974718598] [2019-12-18 11:41:40,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323639218] [2019-12-18 11:41:40,476 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:40,527 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:40,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:40,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:40,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:40,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:40,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697731240] [2019-12-18 11:41:40,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:40,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:40,623 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 11:41:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,834 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2019-12-18 11:41:40,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:40,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,836 INFO L225 Difference]: With dead ends: 152 [2019-12-18 11:41:40,837 INFO L226 Difference]: Without dead ends: 151 [2019-12-18 11:41:40,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-18 11:41:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2019-12-18 11:41:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 11:41:40,842 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 11:41:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,842 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 11:41:40,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 11:41:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,843 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,046 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-18 11:41:41,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71702986] [2019-12-18 11:41:41,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71702986] [2019-12-18 11:41:41,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486264934] [2019-12-18 11:41:41,130 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:41,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:41,662 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 11:41:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:41,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:41,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92814203] [2019-12-18 11:41:41,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:41,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:41,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:41,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:41,664 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 11:41:42,026 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-18 11:41:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,073 INFO L93 Difference]: Finished difference Result 167 states and 372 transitions. [2019-12-18 11:41:42,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:42,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,075 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:41:42,075 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:41:42,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:41:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2019-12-18 11:41:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:41:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-18 11:41:42,080 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-18 11:41:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,080 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-18 11:41:42,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-18 11:41:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:42,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,081 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:42,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,285 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-18 11:41:42,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:42,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547109733] [2019-12-18 11:41:42,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547109733] [2019-12-18 11:41:42,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619556443] [2019-12-18 11:41:42,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:42,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:42,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:42,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:42,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841633845] [2019-12-18 11:41:42,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:42,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:42,502 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 14 states. [2019-12-18 11:41:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,812 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2019-12-18 11:41:42,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:42,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,813 INFO L225 Difference]: With dead ends: 160 [2019-12-18 11:41:42,813 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 11:41:42,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 11:41:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2019-12-18 11:41:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:41:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 11:41:42,818 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 11:41:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,818 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 11:41:42,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 11:41:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:42,819 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,819 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:43,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,023 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-18 11:41:43,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:43,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186021894] [2019-12-18 11:41:43,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186021894] [2019-12-18 11:41:43,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920619415] [2019-12-18 11:41:43,101 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:43,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:43,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:43,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:43,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504926233] [2019-12-18 11:41:43,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:43,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:43,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:43,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:43,243 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 11:41:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:43,614 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2019-12-18 11:41:43,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:43,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:43,616 INFO L225 Difference]: With dead ends: 162 [2019-12-18 11:41:43,616 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:41:43,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:41:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2019-12-18 11:41:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:43,627 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:43,627 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:43,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:43,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:43,628 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:43,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,831 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:43,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-18 11:41:43,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:43,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122325814] [2019-12-18 11:41:43,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122325814] [2019-12-18 11:41:43,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618356066] [2019-12-18 11:41:43,904 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:43,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:43,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:44,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:44,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178483198] [2019-12-18 11:41:44,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:44,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:44,051 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:45,005 INFO L93 Difference]: Finished difference Result 178 states and 396 transitions. [2019-12-18 11:41:45,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:45,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:45,007 INFO L225 Difference]: With dead ends: 178 [2019-12-18 11:41:45,007 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 11:41:45,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 11:41:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-18 11:41:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 11:41:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 11:41:45,012 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 11:41:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:45,012 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 11:41:45,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 11:41:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:45,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:45,013 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:45,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:45,216 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-18 11:41:45,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:45,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207939918] [2019-12-18 11:41:45,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207939918] [2019-12-18 11:41:45,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035394682] [2019-12-18 11:41:45,290 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:45,333 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:45,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:45,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:45,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:45,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:45,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909562376] [2019-12-18 11:41:45,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:45,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:45,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:45,448 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 11:41:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:46,164 INFO L93 Difference]: Finished difference Result 178 states and 393 transitions. [2019-12-18 11:41:46,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:46,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:46,166 INFO L225 Difference]: With dead ends: 178 [2019-12-18 11:41:46,166 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 11:41:46,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 11:41:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-18 11:41:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 11:41:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 11:41:46,170 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 11:41:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:46,171 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 11:41:46,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 11:41:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:46,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:46,171 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:46,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,374 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-18 11:41:46,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:46,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6236600] [2019-12-18 11:41:46,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6236600] [2019-12-18 11:41:46,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817275759] [2019-12-18 11:41:46,441 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:46,484 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:46,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:46,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:46,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:46,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:46,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436056097] [2019-12-18 11:41:46,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:46,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:46,552 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 11:41:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:46,806 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-18 11:41:46,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:46,807 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:46,808 INFO L225 Difference]: With dead ends: 161 [2019-12-18 11:41:46,808 INFO L226 Difference]: Without dead ends: 160 [2019-12-18 11:41:46,809 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-18 11:41:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2019-12-18 11:41:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:41:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 11:41:46,815 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 11:41:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:46,815 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 11:41:46,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 11:41:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:46,816 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:46,816 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,019 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-18 11:41:47,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358619055] [2019-12-18 11:41:47,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358619055] [2019-12-18 11:41:47,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049065099] [2019-12-18 11:41:47,097 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:47,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:47,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:47,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715325052] [2019-12-18 11:41:47,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:47,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:47,211 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 11:41:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:47,485 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2019-12-18 11:41:47,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:47,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:47,488 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:41:47,488 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 11:41:47,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 11:41:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-18 11:41:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 11:41:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-18 11:41:47,492 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-18 11:41:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:47,493 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-18 11:41:47,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-18 11:41:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:47,494 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:47,494 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,697 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-18 11:41:47,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918648182] [2019-12-18 11:41:47,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918648182] [2019-12-18 11:41:47,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404162536] [2019-12-18 11:41:47,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:47,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:47,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:47,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:47,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:47,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:47,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:47,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315414496] [2019-12-18 11:41:47,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:47,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:47,945 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-18 11:41:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:48,277 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-18 11:41:48,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:48,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:48,280 INFO L225 Difference]: With dead ends: 182 [2019-12-18 11:41:48,280 INFO L226 Difference]: Without dead ends: 180 [2019-12-18 11:41:48,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-18 11:41:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 129. [2019-12-18 11:41:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:41:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 11:41:48,286 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 11:41:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:48,286 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 11:41:48,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 11:41:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:48,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:48,288 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:48,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:48,489 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-18 11:41:48,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:48,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770086532] [2019-12-18 11:41:48,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770086532] [2019-12-18 11:41:48,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950528258] [2019-12-18 11:41:48,546 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:48,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:48,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:48,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:48,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:48,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:48,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115820358] [2019-12-18 11:41:48,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:48,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:48,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:48,667 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 11:41:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:48,941 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-18 11:41:48,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:41:48,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:48,943 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:41:48,944 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 11:41:48,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:41:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 11:41:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-18 11:41:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 11:41:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 311 transitions. [2019-12-18 11:41:48,947 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 311 transitions. Word has length 12 [2019-12-18 11:41:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:48,947 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 311 transitions. [2019-12-18 11:41:48,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 311 transitions. [2019-12-18 11:41:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:48,948 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:48,948 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:49,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,149 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-18 11:41:49,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:49,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983926769] [2019-12-18 11:41:49,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983926769] [2019-12-18 11:41:49,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762733432] [2019-12-18 11:41:49,214 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:49,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:49,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:49,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:49,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:49,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:49,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540929061] [2019-12-18 11:41:49,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:49,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:49,355 INFO L87 Difference]: Start difference. First operand 131 states and 311 transitions. Second operand 14 states. [2019-12-18 11:41:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:49,704 INFO L93 Difference]: Finished difference Result 176 states and 396 transitions. [2019-12-18 11:41:49,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:49,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:49,706 INFO L225 Difference]: With dead ends: 176 [2019-12-18 11:41:49,706 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 11:41:49,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 11:41:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-18 11:41:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 11:41:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-18 11:41:49,711 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-18 11:41:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:49,711 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-18 11:41:49,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-18 11:41:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:49,712 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:49,712 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:49,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,913 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 11:41:49,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:49,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353193930] [2019-12-18 11:41:49,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353193930] [2019-12-18 11:41:49,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253495060] [2019-12-18 11:41:49,981 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:50,023 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:50,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:50,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:50,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:50,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:50,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976042101] [2019-12-18 11:41:50,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:50,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:50,110 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 16 states. [2019-12-18 11:41:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:50,257 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 11:41:50,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:50,263 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:50,264 INFO L225 Difference]: With dead ends: 143 [2019-12-18 11:41:50,264 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 11:41:50,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 11:41:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-18 11:41:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 11:41:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-18 11:41:50,268 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-18 11:41:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:50,268 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-18 11:41:50,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-18 11:41:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:50,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:50,269 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:50,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,472 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:50,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-18 11:41:50,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:50,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729426330] [2019-12-18 11:41:50,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729426330] [2019-12-18 11:41:50,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113368249] [2019-12-18 11:41:50,537 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:50,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:50,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:50,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:50,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:50,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:50,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399281744] [2019-12-18 11:41:50,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:50,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:50,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:50,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:50,677 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 16 states. [2019-12-18 11:41:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:50,827 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-18 11:41:50,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:50,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:50,829 INFO L225 Difference]: With dead ends: 154 [2019-12-18 11:41:50,829 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 11:41:50,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 11:41:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-18 11:41:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 11:41:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-18 11:41:50,833 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-18 11:41:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:50,833 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-18 11:41:50,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-18 11:41:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:50,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:50,834 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:51,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,035 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-18 11:41:51,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:51,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193627151] [2019-12-18 11:41:51,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193627151] [2019-12-18 11:41:51,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969248033] [2019-12-18 11:41:51,100 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:51,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:51,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:51,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:51,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:51,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:51,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851604390] [2019-12-18 11:41:51,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:51,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:51,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:51,227 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 16 states. [2019-12-18 11:41:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:51,383 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-18 11:41:51,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:51,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:51,385 INFO L225 Difference]: With dead ends: 163 [2019-12-18 11:41:51,385 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 11:41:51,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 11:41:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-18 11:41:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:41:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-18 11:41:51,388 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-18 11:41:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:51,389 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-18 11:41:51,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-18 11:41:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:51,389 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:51,389 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:51,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,593 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-18 11:41:51,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:51,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198693328] [2019-12-18 11:41:51,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:51,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198693328] [2019-12-18 11:41:51,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914100160] [2019-12-18 11:41:51,687 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:51,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:52,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:52,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617244115] [2019-12-18 11:41:52,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:52,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=154, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:41:52,592 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 16 states. [2019-12-18 11:41:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,795 INFO L93 Difference]: Finished difference Result 164 states and 368 transitions. [2019-12-18 11:41:52,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:52,796 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,797 INFO L225 Difference]: With dead ends: 164 [2019-12-18 11:41:52,797 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:41:52,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=321, Unknown=2, NotChecked=0, Total=506 [2019-12-18 11:41:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:41:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-12-18 11:41:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:41:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-18 11:41:52,801 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-18 11:41:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,801 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-18 11:41:52,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-18 11:41:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,802 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:53,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:53,002 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-18 11:41:53,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:53,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243718662] [2019-12-18 11:41:53,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243718662] [2019-12-18 11:41:53,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238493083] [2019-12-18 11:41:53,086 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:53,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:53,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:53,145 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:53,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:53,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:53,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371117830] [2019-12-18 11:41:53,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:53,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:53,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:53,240 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 16 states. [2019-12-18 11:41:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:53,398 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-18 11:41:53,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:53,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:53,400 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:41:53,400 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:41:53,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:41:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-18 11:41:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:41:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 11:41:53,405 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 11:41:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:53,405 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 11:41:53,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 11:41:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:53,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:53,405 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:53,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:53,606 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-18 11:41:53,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:53,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406005249] [2019-12-18 11:41:53,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:53,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406005249] [2019-12-18 11:41:53,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344341788] [2019-12-18 11:41:53,686 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:53,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:53,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:53,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:53,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:54,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:54,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:54,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041354860] [2019-12-18 11:41:54,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:54,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:54,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:54,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:54,083 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 11:41:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:54,339 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2019-12-18 11:41:54,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:54,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:54,343 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:41:54,343 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 11:41:54,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 11:41:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2019-12-18 11:41:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:41:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-18 11:41:54,349 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-18 11:41:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:54,349 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-18 11:41:54,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-18 11:41:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:54,350 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:54,350 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:54,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:54,553 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-18 11:41:54,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:54,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440939028] [2019-12-18 11:41:54,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:54,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440939028] [2019-12-18 11:41:54,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013050112] [2019-12-18 11:41:54,659 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:41:54,731 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:54,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:54,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:54,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:57,642 WARN L192 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:41:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:57,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:57,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:57,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135311210] [2019-12-18 11:41:57,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:57,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=157, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:41:57,644 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 16 states. [2019-12-18 11:41:58,298 WARN L192 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:41:58,826 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:41:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:58,876 INFO L93 Difference]: Finished difference Result 188 states and 421 transitions. [2019-12-18 11:41:58,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:58,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:58,878 INFO L225 Difference]: With dead ends: 188 [2019-12-18 11:41:58,878 INFO L226 Difference]: Without dead ends: 187 [2019-12-18 11:41:58,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=197, Invalid=354, Unknown=1, NotChecked=0, Total=552 [2019-12-18 11:41:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-18 11:41:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2019-12-18 11:41:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:41:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 11:41:58,882 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 11:41:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:58,882 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 11:41:58,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 11:41:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:58,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:58,883 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:59,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:59,084 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-18 11:41:59,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:59,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573263386] [2019-12-18 11:41:59,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:59,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573263386] [2019-12-18 11:41:59,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457040763] [2019-12-18 11:41:59,169 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:59,227 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:59,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:59,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:59,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:00,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:00,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:00,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493714078] [2019-12-18 11:42:00,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:00,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:00,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:00,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=151, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:42:00,803 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 11:42:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,153 INFO L93 Difference]: Finished difference Result 168 states and 377 transitions. [2019-12-18 11:42:01,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:42:01,154 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,155 INFO L225 Difference]: With dead ends: 168 [2019-12-18 11:42:01,155 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 11:42:01,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=209, Invalid=341, Unknown=2, NotChecked=0, Total=552 [2019-12-18 11:42:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 11:42:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2019-12-18 11:42:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:42:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-18 11:42:01,159 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-18 11:42:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,160 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-18 11:42:01,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-18 11:42:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,161 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:01,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,364 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-18 11:42:01,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:01,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734380394] [2019-12-18 11:42:01,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734380394] [2019-12-18 11:42:01,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239972199] [2019-12-18 11:42:01,439 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:01,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:01,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:01,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:01,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:01,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:01,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:01,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580481886] [2019-12-18 11:42:01,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:01,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:01,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:01,578 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 16 states. [2019-12-18 11:42:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,741 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-18 11:42:01,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:01,742 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,743 INFO L225 Difference]: With dead ends: 165 [2019-12-18 11:42:01,743 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 11:42:01,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:42:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 11:42:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-18 11:42:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 11:42:01,747 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 11:42:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,748 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 11:42:01,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 11:42:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,748 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:01,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,949 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-18 11:42:01,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:01,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418440049] [2019-12-18 11:42:01,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418440049] [2019-12-18 11:42:02,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115719289] [2019-12-18 11:42:02,028 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:02,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945142695] [2019-12-18 11:42:02,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,181 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 11:42:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:02,484 INFO L93 Difference]: Finished difference Result 190 states and 429 transitions. [2019-12-18 11:42:02,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:02,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:02,486 INFO L225 Difference]: With dead ends: 190 [2019-12-18 11:42:02,486 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 11:42:02,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 11:42:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2019-12-18 11:42:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:42:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-18 11:42:02,490 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-18 11:42:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:02,490 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-18 11:42:02,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-18 11:42:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:02,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:02,492 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:02,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,695 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:02,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-18 11:42:02,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:02,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565862544] [2019-12-18 11:42:02,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565862544] [2019-12-18 11:42:02,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632109458] [2019-12-18 11:42:02,789 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:02,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:02,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:02,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:02,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906362804] [2019-12-18 11:42:02,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,985 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 16 states. [2019-12-18 11:42:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:03,747 INFO L93 Difference]: Finished difference Result 200 states and 448 transitions. [2019-12-18 11:42:03,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:03,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:03,749 INFO L225 Difference]: With dead ends: 200 [2019-12-18 11:42:03,749 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 11:42:03,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 11:42:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2019-12-18 11:42:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 11:42:03,753 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 11:42:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:03,753 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 11:42:03,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 11:42:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:03,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:03,753 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:03,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:03,954 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-18 11:42:03,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:03,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731414958] [2019-12-18 11:42:03,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:04,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731414958] [2019-12-18 11:42:04,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375952661] [2019-12-18 11:42:04,031 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:04,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:42:04,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:04,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:04,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:04,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:04,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:04,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017196284] [2019-12-18 11:42:04,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:04,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:04,208 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 11:42:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:05,211 INFO L93 Difference]: Finished difference Result 198 states and 437 transitions. [2019-12-18 11:42:05,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:05,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:05,213 INFO L225 Difference]: With dead ends: 198 [2019-12-18 11:42:05,213 INFO L226 Difference]: Without dead ends: 192 [2019-12-18 11:42:05,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-18 11:42:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2019-12-18 11:42:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 11:42:05,217 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 11:42:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:05,218 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 11:42:05,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 11:42:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:05,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:05,218 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:05,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,419 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:05,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-18 11:42:05,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:05,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334136474] [2019-12-18 11:42:05,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:05,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334136474] [2019-12-18 11:42:05,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390850372] [2019-12-18 11:42:05,503 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:05,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:05,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:05,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:05,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:05,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:05,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:05,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622957436] [2019-12-18 11:42:05,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:05,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:05,674 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 11:42:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:06,019 INFO L93 Difference]: Finished difference Result 194 states and 439 transitions. [2019-12-18 11:42:06,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:06,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:06,020 INFO L225 Difference]: With dead ends: 194 [2019-12-18 11:42:06,020 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 11:42:06,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 11:42:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 139. [2019-12-18 11:42:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:42:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-18 11:42:06,024 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-18 11:42:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:06,024 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-18 11:42:06,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-18 11:42:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:06,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:06,025 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:06,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,227 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-18 11:42:06,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:06,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142603440] [2019-12-18 11:42:06,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:06,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142603440] [2019-12-18 11:42:06,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276843041] [2019-12-18 11:42:06,297 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:06,338 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:06,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:06,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:06,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:06,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:06,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:06,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135511646] [2019-12-18 11:42:06,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:06,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:06,520 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-18 11:42:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:06,930 INFO L93 Difference]: Finished difference Result 201 states and 456 transitions. [2019-12-18 11:42:06,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:06,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:06,932 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:06,932 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:06,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 11:42:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 11:42:06,936 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 11:42:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:06,937 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 11:42:06,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 11:42:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:06,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:06,937 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:07,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,140 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-18 11:42:07,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:07,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687705597] [2019-12-18 11:42:07,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:07,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687705597] [2019-12-18 11:42:07,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014821840] [2019-12-18 11:42:07,221 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:07,267 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:07,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:07,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:07,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:07,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:07,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:07,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065625056] [2019-12-18 11:42:07,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:07,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:07,502 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 11:42:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:09,982 INFO L93 Difference]: Finished difference Result 186 states and 420 transitions. [2019-12-18 11:42:09,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:09,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:09,984 INFO L225 Difference]: With dead ends: 186 [2019-12-18 11:42:09,984 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 11:42:09,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 11:42:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2019-12-18 11:42:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:42:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-18 11:42:09,989 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-18 11:42:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:09,989 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-18 11:42:09,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-18 11:42:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:09,990 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:09,990 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:10,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:10,193 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-18 11:42:10,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:10,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755593752] [2019-12-18 11:42:10,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755593752] [2019-12-18 11:42:10,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727158213] [2019-12-18 11:42:10,265 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:10,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:10,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:10,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:10,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426610357] [2019-12-18 11:42:10,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:10,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:10,393 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 16 states. [2019-12-18 11:42:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:10,555 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-18 11:42:10,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:10,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:10,558 INFO L225 Difference]: With dead ends: 162 [2019-12-18 11:42:10,558 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:42:10,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:42:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:42:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-18 11:42:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 11:42:10,561 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 11:42:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:10,561 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 11:42:10,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 11:42:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:10,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:10,562 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:10,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:10,763 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-18 11:42:10,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:10,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849490002] [2019-12-18 11:42:10,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849490002] [2019-12-18 11:42:10,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693025779] [2019-12-18 11:42:10,836 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:10,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:10,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:10,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:10,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:10,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:10,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:10,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586265104] [2019-12-18 11:42:10,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:10,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:10,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:10,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:10,961 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 11:42:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:11,228 INFO L93 Difference]: Finished difference Result 183 states and 412 transitions. [2019-12-18 11:42:11,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:11,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:11,230 INFO L225 Difference]: With dead ends: 183 [2019-12-18 11:42:11,230 INFO L226 Difference]: Without dead ends: 182 [2019-12-18 11:42:11,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-18 11:42:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-18 11:42:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-18 11:42:11,234 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-18 11:42:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:11,234 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-18 11:42:11,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-18 11:42:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:11,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:11,235 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:11,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:11,436 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-18 11:42:11,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:11,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000472510] [2019-12-18 11:42:11,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:11,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000472510] [2019-12-18 11:42:11,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134038453] [2019-12-18 11:42:11,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:11,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:11,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:11,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:11,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:11,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:11,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:11,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121131269] [2019-12-18 11:42:11,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:11,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:11,787 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 16 states. [2019-12-18 11:42:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:12,109 INFO L93 Difference]: Finished difference Result 208 states and 461 transitions. [2019-12-18 11:42:12,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:12,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:12,111 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:42:12,112 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:42:12,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:42:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 11:42:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 11:42:12,115 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 11:42:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:12,115 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 11:42:12,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 11:42:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:12,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:12,116 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:12,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:12,316 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-18 11:42:12,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:12,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306585545] [2019-12-18 11:42:12,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:12,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306585545] [2019-12-18 11:42:12,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698471731] [2019-12-18 11:42:12,382 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:12,426 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:12,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:12,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:12,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:12,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:12,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:12,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815146154] [2019-12-18 11:42:12,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:12,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:12,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:12,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:12,514 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 11:42:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:12,822 INFO L93 Difference]: Finished difference Result 192 states and 432 transitions. [2019-12-18 11:42:12,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:12,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:12,824 INFO L225 Difference]: With dead ends: 192 [2019-12-18 11:42:12,824 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 11:42:12,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 11:42:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2019-12-18 11:42:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:42:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-18 11:42:12,828 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-18 11:42:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:12,829 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-18 11:42:12,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-18 11:42:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:12,829 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:12,829 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:13,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:13,032 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-18 11:42:13,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:13,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880466927] [2019-12-18 11:42:13,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:13,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880466927] [2019-12-18 11:42:13,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721625927] [2019-12-18 11:42:13,103 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:13,145 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:13,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:13,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:13,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:13,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:13,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:13,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496457918] [2019-12-18 11:42:13,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:13,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:13,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:13,388 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 16 states. [2019-12-18 11:42:13,779 WARN L192 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:14,176 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:14,754 INFO L93 Difference]: Finished difference Result 208 states and 458 transitions. [2019-12-18 11:42:14,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:14,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:14,756 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:42:14,756 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:42:14,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:42:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 11:42:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 11:42:14,760 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 11:42:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:14,760 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 11:42:14,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 11:42:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:14,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:14,761 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:14,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:14,964 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-18 11:42:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:14,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154623607] [2019-12-18 11:42:14,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:15,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154623607] [2019-12-18 11:42:15,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602383904] [2019-12-18 11:42:15,042 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:15,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:15,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:15,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:15,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:15,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:15,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:15,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780979487] [2019-12-18 11:42:15,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:15,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:15,211 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 11:42:16,072 WARN L192 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 11:42:16,667 WARN L192 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:17,000 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:17,017 INFO L93 Difference]: Finished difference Result 224 states and 504 transitions. [2019-12-18 11:42:17,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:17,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:17,020 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:42:17,020 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:42:17,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:42:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2019-12-18 11:42:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:42:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 11:42:17,024 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 11:42:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:17,024 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 11:42:17,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 11:42:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:17,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:17,025 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,226 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-18 11:42:17,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477613913] [2019-12-18 11:42:17,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477613913] [2019-12-18 11:42:17,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092901469] [2019-12-18 11:42:17,304 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:17,879 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_231 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_231)) (<= (div (+ (* v_~i~0_231 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~i~0_231) 2)))) is different from true [2019-12-18 11:42:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:17,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:17,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981768074] [2019-12-18 11:42:17,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:17,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=141, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:42:17,880 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 11:42:18,744 WARN L192 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-12-18 11:42:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:18,812 INFO L93 Difference]: Finished difference Result 216 states and 490 transitions. [2019-12-18 11:42:18,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:18,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:18,814 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:42:18,814 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:42:18,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=280, Invalid=535, Unknown=1, NotChecked=54, Total=870 [2019-12-18 11:42:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:42:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2019-12-18 11:42:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:42:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-18 11:42:18,819 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 13 [2019-12-18 11:42:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:18,819 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-18 11:42:18,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-18 11:42:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:18,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:18,820 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:19,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,023 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-18 11:42:19,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:19,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741862192] [2019-12-18 11:42:19,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741862192] [2019-12-18 11:42:19,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473533885] [2019-12-18 11:42:19,106 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:19,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:19,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:19,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:19,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:19,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:19,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680501480] [2019-12-18 11:42:19,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:19,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:19,222 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 16 states. [2019-12-18 11:42:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:19,529 INFO L93 Difference]: Finished difference Result 199 states and 449 transitions. [2019-12-18 11:42:19,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:19,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:19,531 INFO L225 Difference]: With dead ends: 199 [2019-12-18 11:42:19,531 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:42:19,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:42:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 144. [2019-12-18 11:42:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 11:42:19,534 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 11:42:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:19,535 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 11:42:19,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 11:42:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:19,535 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:19,535 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:19,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,738 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-18 11:42:19,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:19,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042184187] [2019-12-18 11:42:19,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042184187] [2019-12-18 11:42:19,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716434083] [2019-12-18 11:42:19,819 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:19,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:19,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:19,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:19,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:19,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:19,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337672649] [2019-12-18 11:42:19,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:19,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:19,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:19,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:19,950 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 11:42:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:20,248 INFO L93 Difference]: Finished difference Result 211 states and 484 transitions. [2019-12-18 11:42:20,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:20,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:20,250 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:42:20,250 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:42:20,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:42:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2019-12-18 11:42:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:42:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 11:42:20,254 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 11:42:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:20,254 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 11:42:20,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 11:42:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:20,255 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:20,255 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:20,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:20,456 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-18 11:42:20,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:20,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615567711] [2019-12-18 11:42:20,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615567711] [2019-12-18 11:42:20,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365946204] [2019-12-18 11:42:20,529 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:20,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:20,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:20,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:20,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:20,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:20,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:20,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327168972] [2019-12-18 11:42:20,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:20,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:20,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:20,661 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 11:42:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:20,951 INFO L93 Difference]: Finished difference Result 219 states and 500 transitions. [2019-12-18 11:42:20,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:20,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:20,954 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:42:20,954 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 11:42:20,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 11:42:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2019-12-18 11:42:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:42:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 11:42:20,958 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 11:42:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:20,958 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 11:42:20,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 11:42:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:20,959 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:20,959 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:21,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:21,160 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-18 11:42:21,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:21,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456535013] [2019-12-18 11:42:21,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:21,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456535013] [2019-12-18 11:42:21,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078002403] [2019-12-18 11:42:21,239 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:21,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:21,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:21,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:21,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:21,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:21,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:21,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622513504] [2019-12-18 11:42:21,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:21,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:21,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:21,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:21,470 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 11:42:21,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:21,799 INFO L93 Difference]: Finished difference Result 210 states and 476 transitions. [2019-12-18 11:42:21,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:21,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:21,801 INFO L225 Difference]: With dead ends: 210 [2019-12-18 11:42:21,801 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 11:42:21,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 11:42:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2019-12-18 11:42:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 337 transitions. [2019-12-18 11:42:21,805 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 337 transitions. Word has length 13 [2019-12-18 11:42:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:21,805 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 337 transitions. [2019-12-18 11:42:21,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 337 transitions. [2019-12-18 11:42:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:21,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:21,806 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:22,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,010 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-18 11:42:22,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:22,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784418439] [2019-12-18 11:42:22,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784418439] [2019-12-18 11:42:22,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362132771] [2019-12-18 11:42:22,084 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:22,127 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:42:22,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:22,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:22,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:22,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:22,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901053110] [2019-12-18 11:42:22,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:22,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:22,222 INFO L87 Difference]: Start difference. First operand 141 states and 337 transitions. Second operand 16 states. [2019-12-18 11:42:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:22,582 INFO L93 Difference]: Finished difference Result 206 states and 464 transitions. [2019-12-18 11:42:22,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:22,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:22,584 INFO L225 Difference]: With dead ends: 206 [2019-12-18 11:42:22,584 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 11:42:22,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 11:42:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2019-12-18 11:42:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:22,589 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:22,589 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:22,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:22,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:22,590 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:22,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,793 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-18 11:42:22,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:22,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358342893] [2019-12-18 11:42:22,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358342893] [2019-12-18 11:42:22,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243192962] [2019-12-18 11:42:22,869 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:22,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:22,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:22,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053948532] [2019-12-18 11:42:22,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:22,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:22,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:22,995 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:23,293 INFO L93 Difference]: Finished difference Result 173 states and 386 transitions. [2019-12-18 11:42:23,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:23,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:23,295 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:42:23,295 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 11:42:23,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 11:42:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2019-12-18 11:42:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:23,299 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:23,300 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:23,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:23,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:23,301 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:23,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:23,504 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-18 11:42:23,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:23,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674449495] [2019-12-18 11:42:23,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:23,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674449495] [2019-12-18 11:42:23,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406454191] [2019-12-18 11:42:23,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:23,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:23,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:23,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:23,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:23,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:23,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:23,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004220360] [2019-12-18 11:42:23,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:23,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:23,724 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:24,576 WARN L192 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-18 11:42:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:24,672 INFO L93 Difference]: Finished difference Result 189 states and 417 transitions. [2019-12-18 11:42:24,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:24,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:24,674 INFO L225 Difference]: With dead ends: 189 [2019-12-18 11:42:24,674 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:42:24,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:42:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2019-12-18 11:42:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:42:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-18 11:42:24,677 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-18 11:42:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:24,677 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-18 11:42:24,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-18 11:42:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:24,677 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:24,678 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:24,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:24,878 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-18 11:42:24,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:24,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921053913] [2019-12-18 11:42:24,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:24,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921053913] [2019-12-18 11:42:24,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512690524] [2019-12-18 11:42:24,955 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:24,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:24,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:25,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:25,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:25,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:25,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:25,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712563578] [2019-12-18 11:42:25,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:25,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:25,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:25,096 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 16 states. [2019-12-18 11:42:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:25,409 INFO L93 Difference]: Finished difference Result 182 states and 406 transitions. [2019-12-18 11:42:25,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:25,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:25,411 INFO L225 Difference]: With dead ends: 182 [2019-12-18 11:42:25,412 INFO L226 Difference]: Without dead ends: 181 [2019-12-18 11:42:25,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-18 11:42:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-18 11:42:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:25,415 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:25,416 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:25,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:25,416 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:25,416 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:25,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:25,617 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-18 11:42:25,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:25,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895117227] [2019-12-18 11:42:25,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:25,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895117227] [2019-12-18 11:42:25,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135282638] [2019-12-18 11:42:25,702 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:25,746 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:25,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:25,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:25,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:25,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:25,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:25,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264395236] [2019-12-18 11:42:25,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:25,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:25,872 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:27,866 INFO L93 Difference]: Finished difference Result 199 states and 439 transitions. [2019-12-18 11:42:27,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:27,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:27,867 INFO L225 Difference]: With dead ends: 199 [2019-12-18 11:42:27,868 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:42:27,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=236, Invalid=464, Unknown=2, NotChecked=0, Total=702 [2019-12-18 11:42:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:42:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2019-12-18 11:42:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 11:42:27,871 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 11:42:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:27,872 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 11:42:27,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 11:42:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:27,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:27,873 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:28,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:28,076 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-18 11:42:28,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:28,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320062689] [2019-12-18 11:42:28,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:28,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320062689] [2019-12-18 11:42:28,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548442185] [2019-12-18 11:42:28,163 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:28,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:28,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:28,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:28,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:29,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:29,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:29,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93973002] [2019-12-18 11:42:29,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:29,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=169, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:42:29,325 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 11:42:29,753 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 11:42:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:30,534 INFO L93 Difference]: Finished difference Result 215 states and 476 transitions. [2019-12-18 11:42:30,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:30,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:30,536 INFO L225 Difference]: With dead ends: 215 [2019-12-18 11:42:30,536 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 11:42:30,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=229, Invalid=471, Unknown=2, NotChecked=0, Total=702 [2019-12-18 11:42:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 11:42:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2019-12-18 11:42:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:42:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 11:42:30,540 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 11:42:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:30,540 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 11:42:30,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 11:42:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:30,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:30,540 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:30,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,741 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-18 11:42:30,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:30,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47827482] [2019-12-18 11:42:30,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47827482] [2019-12-18 11:42:30,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196925984] [2019-12-18 11:42:30,815 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:30,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:30,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:30,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:30,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:30,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:30,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979083665] [2019-12-18 11:42:30,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:30,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:30,964 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 11:42:31,212 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-18 11:42:31,661 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:32,737 WARN L192 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:42:33,432 WARN L192 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2019-12-18 11:42:34,094 WARN L192 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:34,123 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2019-12-18 11:42:34,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:34,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:34,125 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:34,125 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:34,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=275, Invalid=536, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:42:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 11:42:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:42:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 11:42:34,129 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 11:42:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:34,130 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 11:42:34,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 11:42:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:34,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:34,130 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:34,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:34,331 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-18 11:42:34,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:34,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943268889] [2019-12-18 11:42:34,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:34,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943268889] [2019-12-18 11:42:34,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144573786] [2019-12-18 11:42:34,408 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:34,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:34,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:34,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:34,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:34,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357163511] [2019-12-18 11:42:34,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:34,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:34,582 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 11:42:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:35,092 INFO L93 Difference]: Finished difference Result 187 states and 415 transitions. [2019-12-18 11:42:35,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:35,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:35,093 INFO L225 Difference]: With dead ends: 187 [2019-12-18 11:42:35,093 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 11:42:35,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 11:42:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-18 11:42:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:42:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 11:42:35,096 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 11:42:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:35,096 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 11:42:35,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 11:42:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:35,097 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:35,097 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:35,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,298 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-18 11:42:35,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:35,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900757084] [2019-12-18 11:42:35,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900757084] [2019-12-18 11:42:35,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251952829] [2019-12-18 11:42:35,370 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:42:35,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:35,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:35,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:35,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:08,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:08,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:08,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358342388] [2019-12-18 11:43:08,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:08,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:08,514 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 11:43:10,954 WARN L192 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:43:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:11,371 INFO L93 Difference]: Finished difference Result 207 states and 458 transitions. [2019-12-18 11:43:11,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:11,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:11,373 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:43:11,373 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:43:11,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:43:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 140. [2019-12-18 11:43:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:43:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 11:43:11,377 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 11:43:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:11,377 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 11:43:11,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 11:43:11,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:11,378 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:11,378 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:11,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:11,579 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:11,579 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-18 11:43:11,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:11,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447213110] [2019-12-18 11:43:11,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:11,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447213110] [2019-12-18 11:43:11,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400502498] [2019-12-18 11:43:11,659 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:11,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:11,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:11,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:11,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:11,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:11,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:11,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084220706] [2019-12-18 11:43:11,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:11,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:11,849 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 11:43:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:12,418 INFO L93 Difference]: Finished difference Result 229 states and 508 transitions. [2019-12-18 11:43:12,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:12,418 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:12,420 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:43:12,420 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 11:43:12,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 11:43:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2019-12-18 11:43:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:43:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-18 11:43:12,424 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 13 [2019-12-18 11:43:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:12,424 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-18 11:43:12,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-18 11:43:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:12,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:12,425 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:12,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:12,627 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-18 11:43:12,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:12,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934893988] [2019-12-18 11:43:12,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:12,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934893988] [2019-12-18 11:43:12,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296779649] [2019-12-18 11:43:12,701 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:12,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:12,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:12,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:12,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:12,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:12,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:12,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204850101] [2019-12-18 11:43:12,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:12,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:12,907 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-18 11:43:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:14,084 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-18 11:43:14,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:14,084 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:14,086 INFO L225 Difference]: With dead ends: 214 [2019-12-18 11:43:14,086 INFO L226 Difference]: Without dead ends: 212 [2019-12-18 11:43:14,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:43:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-18 11:43:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 141. [2019-12-18 11:43:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:43:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 11:43:14,090 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 11:43:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:14,090 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 11:43:14,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 11:43:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:14,091 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:14,091 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:14,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:14,291 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-18 11:43:14,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:14,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484875444] [2019-12-18 11:43:14,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:14,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484875444] [2019-12-18 11:43:14,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704279711] [2019-12-18 11:43:14,377 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:14,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:14,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:14,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:14,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:14,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:14,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:14,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911585079] [2019-12-18 11:43:14,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:14,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:14,559 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 11:43:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:15,633 INFO L93 Difference]: Finished difference Result 224 states and 495 transitions. [2019-12-18 11:43:15,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:15,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:15,635 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:43:15,635 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:43:15,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:43:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:43:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2019-12-18 11:43:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:43:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 11:43:15,639 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 11:43:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:15,639 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 11:43:15,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 11:43:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:15,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:15,640 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:15,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:15,840 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-18 11:43:15,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:15,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413105267] [2019-12-18 11:43:15,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:15,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413105267] [2019-12-18 11:43:15,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204186996] [2019-12-18 11:43:15,943 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:15,999 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:15,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:16,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:16,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:16,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:16,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:16,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177720582] [2019-12-18 11:43:16,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:16,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:16,111 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 11:43:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:16,475 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-18 11:43:16,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:16,476 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:16,477 INFO L225 Difference]: With dead ends: 184 [2019-12-18 11:43:16,477 INFO L226 Difference]: Without dead ends: 183 [2019-12-18 11:43:16,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-18 11:43:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 145. [2019-12-18 11:43:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:43:16,482 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:43:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:16,482 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:43:16,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:43:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:16,482 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:16,483 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:16,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:16,686 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-18 11:43:16,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:16,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604840067] [2019-12-18 11:43:16,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:16,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604840067] [2019-12-18 11:43:16,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259695396] [2019-12-18 11:43:16,771 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:16,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:16,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:16,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:16,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:16,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914843095] [2019-12-18 11:43:16,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:16,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:16,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:16,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:16,921 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:43:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:17,444 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2019-12-18 11:43:17,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:17,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:17,447 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:43:17,447 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:43:17,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:43:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 144. [2019-12-18 11:43:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 11:43:17,452 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 11:43:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:17,452 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 11:43:17,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 11:43:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:17,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:17,453 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:17,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:17,656 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-18 11:43:17,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:17,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392466658] [2019-12-18 11:43:17,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:17,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392466658] [2019-12-18 11:43:17,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646956925] [2019-12-18 11:43:17,750 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:17,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:17,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:17,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:17,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:17,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:17,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:17,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501142025] [2019-12-18 11:43:17,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:17,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:17,950 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 11:43:18,478 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 11:43:20,016 WARN L192 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:43:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:21,087 INFO L93 Difference]: Finished difference Result 222 states and 500 transitions. [2019-12-18 11:43:21,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:21,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:21,089 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:43:21,089 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:43:21,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=252, Invalid=503, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:43:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 145. [2019-12-18 11:43:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:43:21,099 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:43:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:21,100 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:43:21,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:43:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:21,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:21,100 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:21,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:21,301 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-18 11:43:21,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:21,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233451055] [2019-12-18 11:43:21,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:21,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233451055] [2019-12-18 11:43:21,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607455705] [2019-12-18 11:43:21,381 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:21,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:43:21,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:21,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:21,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:21,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:21,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:21,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441653510] [2019-12-18 11:43:21,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:21,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:21,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:21,528 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:43:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:22,014 INFO L93 Difference]: Finished difference Result 226 states and 511 transitions. [2019-12-18 11:43:22,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:43:22,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:22,016 INFO L225 Difference]: With dead ends: 226 [2019-12-18 11:43:22,016 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 11:43:22,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 11:43:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2019-12-18 11:43:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 11:43:22,021 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 11:43:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:22,021 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 11:43:22,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 11:43:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:22,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:22,022 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:22,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:22,226 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:22,226 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-18 11:43:22,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:22,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984286695] [2019-12-18 11:43:22,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:22,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984286695] [2019-12-18 11:43:22,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334754923] [2019-12-18 11:43:22,304 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:22,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:22,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:22,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:22,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:22,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:22,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:22,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409886111] [2019-12-18 11:43:22,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:22,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:22,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:22,438 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 11:43:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:22,849 INFO L93 Difference]: Finished difference Result 229 states and 515 transitions. [2019-12-18 11:43:22,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:22,849 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:22,852 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:43:22,852 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 11:43:22,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 11:43:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 145. [2019-12-18 11:43:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:43:22,856 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:43:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:22,857 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:43:22,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:43:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:22,857 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:22,858 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:23,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:23,061 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-18 11:43:23,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:23,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15268984] [2019-12-18 11:43:23,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:23,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15268984] [2019-12-18 11:43:23,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961266986] [2019-12-18 11:43:23,143 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:23,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:23,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:23,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:23,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:23,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:23,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:23,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321655508] [2019-12-18 11:43:23,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:23,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:23,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:23,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:23,325 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:43:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:23,675 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2019-12-18 11:43:23,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:23,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:23,677 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:43:23,677 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 11:43:23,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:43:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 11:43:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2019-12-18 11:43:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 11:43:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 359 transitions. [2019-12-18 11:43:23,681 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 359 transitions. Word has length 13 [2019-12-18 11:43:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:23,682 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 359 transitions. [2019-12-18 11:43:23,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 359 transitions. [2019-12-18 11:43:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:23,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:23,683 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:23,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:23,884 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:23,885 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-18 11:43:23,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:23,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046470480] [2019-12-18 11:43:23,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:23,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046470480] [2019-12-18 11:43:23,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161425334] [2019-12-18 11:43:23,963 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:24,004 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:24,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:24,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:24,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:24,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:24,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:24,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536731687] [2019-12-18 11:43:24,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:24,113 INFO L87 Difference]: Start difference. First operand 146 states and 359 transitions. Second operand 16 states. [2019-12-18 11:43:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:24,580 INFO L93 Difference]: Finished difference Result 222 states and 507 transitions. [2019-12-18 11:43:24,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:24,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:24,582 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:43:24,582 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:43:24,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:43:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2019-12-18 11:43:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 11:43:24,586 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 11:43:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:24,586 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 11:43:24,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 11:43:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:24,587 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:24,587 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:24,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:24,790 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-18 11:43:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:24,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089585264] [2019-12-18 11:43:24,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:24,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089585264] [2019-12-18 11:43:24,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132713544] [2019-12-18 11:43:24,868 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:24,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:24,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:25,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:25,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:25,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389766254] [2019-12-18 11:43:25,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:25,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:25,059 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 11:43:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:25,675 INFO L93 Difference]: Finished difference Result 222 states and 501 transitions. [2019-12-18 11:43:25,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:43:25,676 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:25,677 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:43:25,677 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:43:25,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:43:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 144. [2019-12-18 11:43:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 11:43:25,681 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 11:43:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:25,681 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 11:43:25,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 11:43:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:25,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:25,682 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:25,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,883 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-18 11:43:25,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:25,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765165341] [2019-12-18 11:43:25,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:25,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765165341] [2019-12-18 11:43:25,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516343126] [2019-12-18 11:43:25,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:26,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:26,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:26,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:26,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:26,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:26,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:26,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707612485] [2019-12-18 11:43:26,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:26,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:26,166 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 11:43:27,084 WARN L192 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:43:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:28,778 INFO L93 Difference]: Finished difference Result 220 states and 495 transitions. [2019-12-18 11:43:28,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:43:28,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:28,780 INFO L225 Difference]: With dead ends: 220 [2019-12-18 11:43:28,780 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 11:43:28,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=537, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:43:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 11:43:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 142. [2019-12-18 11:43:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:43:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 11:43:28,784 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 11:43:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:28,784 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 11:43:28,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 11:43:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:28,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:28,785 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:28,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:28,986 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-18 11:43:28,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:28,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114669907] [2019-12-18 11:43:28,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:29,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114669907] [2019-12-18 11:43:29,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113828431] [2019-12-18 11:43:29,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:29,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:29,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:29,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:43:29,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:29,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:29,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:43:29,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096781370] [2019-12-18 11:43:29,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:43:29,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:43:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:29,214 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 11:43:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:29,512 INFO L93 Difference]: Finished difference Result 163 states and 366 transitions. [2019-12-18 11:43:29,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:43:29,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:43:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:29,513 INFO L225 Difference]: With dead ends: 163 [2019-12-18 11:43:29,514 INFO L226 Difference]: Without dead ends: 153 [2019-12-18 11:43:29,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:43:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-18 11:43:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2019-12-18 11:43:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:43:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-18 11:43:29,518 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-18 11:43:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:29,518 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-18 11:43:29,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:43:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-18 11:43:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:43:29,519 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:29,519 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:29,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:29,722 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-18 11:43:29,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:29,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126151511] [2019-12-18 11:43:29,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:29,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126151511] [2019-12-18 11:43:29,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556469218] [2019-12-18 11:43:29,814 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:43:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:29,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:43:29,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:29,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:43:29,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-18 11:43:29,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661896308] [2019-12-18 11:43:29,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:43:29,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:43:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:29,912 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-18 11:43:29,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:29,937 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-18 11:43:29,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:43:29,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-18 11:43:29,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:29,938 INFO L225 Difference]: With dead ends: 151 [2019-12-18 11:43:29,938 INFO L226 Difference]: Without dead ends: 137 [2019-12-18 11:43:29,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:43:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-18 11:43:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-18 11:43:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:43:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-18 11:43:29,941 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-18 11:43:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:29,941 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-18 11:43:29,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:43:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-18 11:43:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:29,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:29,942 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:30,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,143 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 94 times [2019-12-18 11:43:30,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:30,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84084294] [2019-12-18 11:43:30,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:30,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84084294] [2019-12-18 11:43:30,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893780078] [2019-12-18 11:43:30,236 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:30,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:30,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:30,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:30,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:30,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:30,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971304854] [2019-12-18 11:43:30,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:30,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:30,410 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-18 11:43:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:30,659 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-18 11:43:30,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:30,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:30,660 INFO L225 Difference]: With dead ends: 161 [2019-12-18 11:43:30,661 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 11:43:30,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 11:43:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-18 11:43:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:43:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-18 11:43:30,665 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-18 11:43:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:30,665 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-18 11:43:30,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-18 11:43:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:30,666 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:30,666 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:30,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,867 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:30,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 95 times [2019-12-18 11:43:30,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:30,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660363424] [2019-12-18 11:43:30,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:30,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660363424] [2019-12-18 11:43:30,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592549256] [2019-12-18 11:43:30,951 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,996 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:30,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:30,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:30,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:31,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:31,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:31,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144011560] [2019-12-18 11:43:31,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:31,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:31,115 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-18 11:43:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:31,358 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-18 11:43:31,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:31,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:31,359 INFO L225 Difference]: With dead ends: 169 [2019-12-18 11:43:31,359 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 11:43:31,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 11:43:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-18 11:43:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:43:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-18 11:43:31,363 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-18 11:43:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:31,364 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-18 11:43:31,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-18 11:43:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:31,364 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:31,364 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:31,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:31,567 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 96 times [2019-12-18 11:43:31,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:31,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309585421] [2019-12-18 11:43:31,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:31,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309585421] [2019-12-18 11:43:31,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996915710] [2019-12-18 11:43:31,653 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:31,697 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:31,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:31,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:31,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:31,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:31,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:31,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206037145] [2019-12-18 11:43:31,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:31,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:31,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:31,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:31,896 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-18 11:43:32,505 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:43:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:32,538 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-18 11:43:32,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:43:32,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:32,539 INFO L225 Difference]: With dead ends: 180 [2019-12-18 11:43:32,539 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 11:43:32,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:43:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 11:43:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-18 11:43:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:43:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 11:43:32,542 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 11:43:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:32,542 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 11:43:32,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 11:43:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:32,543 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:32,543 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:32,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:32,744 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:32,744 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 97 times [2019-12-18 11:43:32,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:32,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067902091] [2019-12-18 11:43:32,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:32,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067902091] [2019-12-18 11:43:32,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970009771] [2019-12-18 11:43:32,901 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:32,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:32,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:34,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:34,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:34,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536550440] [2019-12-18 11:43:34,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:34,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:34,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:34,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=201, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:43:34,443 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 11:43:34,843 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:43:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:34,860 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2019-12-18 11:43:34,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:43:34,861 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:34,862 INFO L225 Difference]: With dead ends: 188 [2019-12-18 11:43:34,862 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 11:43:34,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=221, Invalid=426, Unknown=3, NotChecked=0, Total=650 [2019-12-18 11:43:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 11:43:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2019-12-18 11:43:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:43:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 11:43:34,865 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 11:43:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:34,866 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 11:43:34,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 11:43:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:34,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:34,866 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:35,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:35,067 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 98 times [2019-12-18 11:43:35,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:35,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237201948] [2019-12-18 11:43:35,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:35,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237201948] [2019-12-18 11:43:35,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189965423] [2019-12-18 11:43:35,187 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:35,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:35,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:35,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:35,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:35,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:35,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:35,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648927988] [2019-12-18 11:43:35,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:35,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:35,352 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 11:43:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:35,585 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-18 11:43:35,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:35,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:35,586 INFO L225 Difference]: With dead ends: 172 [2019-12-18 11:43:35,586 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 11:43:35,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 11:43:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-18 11:43:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 11:43:35,589 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 11:43:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:35,590 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 11:43:35,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 11:43:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:35,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:35,590 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:35,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:35,791 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 99 times [2019-12-18 11:43:35,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:35,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076700715] [2019-12-18 11:43:35,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:35,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076700715] [2019-12-18 11:43:35,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084268514] [2019-12-18 11:43:35,885 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:35,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:35,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:35,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:35,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:36,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:36,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:36,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243574500] [2019-12-18 11:43:36,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:36,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:36,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:36,816 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 11:43:37,378 WARN L192 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:43:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:37,551 INFO L93 Difference]: Finished difference Result 201 states and 432 transitions. [2019-12-18 11:43:37,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:37,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:37,552 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:43:37,552 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:43:37,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:43:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2019-12-18 11:43:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 11:43:37,556 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 11:43:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:37,557 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 11:43:37,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 11:43:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:37,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:37,557 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:37,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:37,758 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 100 times [2019-12-18 11:43:37,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:37,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328769793] [2019-12-18 11:43:37,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:37,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328769793] [2019-12-18 11:43:37,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201428842] [2019-12-18 11:43:37,843 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:37,890 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:37,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:37,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:37,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:38,259 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:38,758 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_309 Int)) (and (<= c_~j~0 (+ (* 3 v_~j~0_309) 1)) (<= c_~i~0 (+ (* 2 v_~j~0_309) c_~j~0 1)) (<= (div (+ (* v_~j~0_309 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 11:43:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:38,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:38,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:38,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471218283] [2019-12-18 11:43:38,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:38,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=178, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:43:38,760 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 11:43:39,986 WARN L192 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 11:43:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:40,116 INFO L93 Difference]: Finished difference Result 216 states and 457 transitions. [2019-12-18 11:43:40,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:40,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:40,117 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:43:40,117 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:43:40,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=258, Invalid=446, Unknown=2, NotChecked=50, Total=756 [2019-12-18 11:43:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:43:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2019-12-18 11:43:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-18 11:43:40,122 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-18 11:43:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:40,122 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-18 11:43:40,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-18 11:43:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:40,123 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:40,123 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:40,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:40,326 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 101 times [2019-12-18 11:43:40,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:40,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460974879] [2019-12-18 11:43:40,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:40,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460974879] [2019-12-18 11:43:40,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817150903] [2019-12-18 11:43:40,411 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:40,457 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:43:40,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:40,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:40,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:40,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:40,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:40,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902273475] [2019-12-18 11:43:40,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:40,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:40,676 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 18 states. [2019-12-18 11:43:40,931 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-18 11:43:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:42,854 INFO L93 Difference]: Finished difference Result 197 states and 424 transitions. [2019-12-18 11:43:42,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:42,855 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:42,856 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:43:42,856 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 11:43:42,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=547, Unknown=2, NotChecked=0, Total=870 [2019-12-18 11:43:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 11:43:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-18 11:43:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 11:43:42,860 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 11:43:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:42,860 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 11:43:42,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 11:43:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:42,861 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:42,861 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:43,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:43,061 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 102 times [2019-12-18 11:43:43,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:43,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626114072] [2019-12-18 11:43:43,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:43,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626114072] [2019-12-18 11:43:43,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385985782] [2019-12-18 11:43:43,157 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:43,200 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:43,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:43,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:43,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:44,616 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-18 11:43:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:44,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:44,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:44,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639834805] [2019-12-18 11:43:44,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:44,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:44,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:44,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=207, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:44,618 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 11:43:45,331 WARN L192 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:43:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:47,125 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2019-12-18 11:43:47,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:47,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:47,127 INFO L225 Difference]: With dead ends: 205 [2019-12-18 11:43:47,127 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 11:43:47,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=263, Invalid=491, Unknown=2, NotChecked=0, Total=756 [2019-12-18 11:43:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 11:43:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2019-12-18 11:43:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 11:43:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-18 11:43:47,131 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-18 11:43:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:47,131 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-18 11:43:47,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-18 11:43:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:47,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:47,132 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:47,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:47,332 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 103 times [2019-12-18 11:43:47,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:47,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67121421] [2019-12-18 11:43:47,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:47,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67121421] [2019-12-18 11:43:47,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62417341] [2019-12-18 11:43:47,417 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:47,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:47,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:50,702 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:43:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:50,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:50,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:50,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343472354] [2019-12-18 11:43:50,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:50,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=199, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:50,704 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 18 states. [2019-12-18 11:43:51,029 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 11:43:51,839 WARN L192 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2019-12-18 11:43:52,781 WARN L192 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:43:53,326 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:43:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:53,421 INFO L93 Difference]: Finished difference Result 228 states and 488 transitions. [2019-12-18 11:43:53,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:53,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:53,422 INFO L225 Difference]: With dead ends: 228 [2019-12-18 11:43:53,422 INFO L226 Difference]: Without dead ends: 225 [2019-12-18 11:43:53,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=277, Invalid=478, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-18 11:43:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 145. [2019-12-18 11:43:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:43:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-18 11:43:53,425 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-18 11:43:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:53,426 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-18 11:43:53,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-18 11:43:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:53,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:53,426 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:53,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:53,629 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:53,630 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 104 times [2019-12-18 11:43:53,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:53,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971019750] [2019-12-18 11:43:53,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:53,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971019750] [2019-12-18 11:43:53,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789482012] [2019-12-18 11:43:53,712 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:53,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:53,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:53,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:53,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:55,068 WARN L192 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:55,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:55,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:55,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053303284] [2019-12-18 11:43:55,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:55,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:55,109 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 18 states. [2019-12-18 11:43:57,265 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:43:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:57,657 INFO L93 Difference]: Finished difference Result 192 states and 415 transitions. [2019-12-18 11:43:57,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:43:57,658 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:57,659 INFO L225 Difference]: With dead ends: 192 [2019-12-18 11:43:57,659 INFO L226 Difference]: Without dead ends: 190 [2019-12-18 11:43:57,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:43:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-18 11:43:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2019-12-18 11:43:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:43:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 11:43:57,663 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 11:43:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:57,663 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 11:43:57,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 11:43:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:57,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:57,664 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:57,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:57,867 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 105 times [2019-12-18 11:43:57,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:57,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532188785] [2019-12-18 11:43:57,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:57,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532188785] [2019-12-18 11:43:57,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672091853] [2019-12-18 11:43:57,947 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:57,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:57,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:57,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:57,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:58,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:58,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:58,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676489570] [2019-12-18 11:43:58,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:58,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:58,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:58,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:58,116 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 11:43:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:58,329 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-18 11:43:58,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:58,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:58,330 INFO L225 Difference]: With dead ends: 170 [2019-12-18 11:43:58,330 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 11:43:58,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:43:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 11:43:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-18 11:43:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:43:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 11:43:58,337 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 11:43:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:58,338 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 11:43:58,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 11:43:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:58,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:58,338 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:58,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:58,539 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 106 times [2019-12-18 11:43:58,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:58,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952098415] [2019-12-18 11:43:58,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952098415] [2019-12-18 11:43:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424911664] [2019-12-18 11:43:58,622 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:58,663 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:58,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:58,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:58,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:58,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:58,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:58,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801917798] [2019-12-18 11:43:58,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:58,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:58,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:58,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:58,821 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 11:43:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:59,201 INFO L93 Difference]: Finished difference Result 197 states and 428 transitions. [2019-12-18 11:43:59,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:59,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:59,202 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:43:59,202 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 11:43:59,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:43:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 11:43:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2019-12-18 11:43:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:43:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 11:43:59,206 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 11:43:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:59,206 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 11:43:59,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 11:43:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:59,207 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:59,207 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:59,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:59,408 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 107 times [2019-12-18 11:43:59,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:59,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391156129] [2019-12-18 11:43:59,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:59,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391156129] [2019-12-18 11:43:59,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520073459] [2019-12-18 11:43:59,509 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:59,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:59,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:59,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:59,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:59,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:59,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731016327] [2019-12-18 11:43:59,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:59,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:59,704 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 11:44:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:00,331 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2019-12-18 11:44:00,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:00,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:00,333 INFO L225 Difference]: With dead ends: 232 [2019-12-18 11:44:00,333 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 11:44:00,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 11:44:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2019-12-18 11:44:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:44:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-18 11:44:00,337 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-18 11:44:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:00,338 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-18 11:44:00,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-18 11:44:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:00,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:00,338 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:00,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:00,539 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 108 times [2019-12-18 11:44:00,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:00,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792533575] [2019-12-18 11:44:00,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:00,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792533575] [2019-12-18 11:44:00,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036041935] [2019-12-18 11:44:00,633 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:00,675 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:44:00,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:00,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:00,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:00,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:00,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:00,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939728215] [2019-12-18 11:44:00,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:00,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:00,873 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 18 states. [2019-12-18 11:44:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:01,463 INFO L93 Difference]: Finished difference Result 212 states and 456 transitions. [2019-12-18 11:44:01,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:01,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:01,464 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:44:01,464 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 11:44:01,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 11:44:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2019-12-18 11:44:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:44:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 11:44:01,468 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 11:44:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:01,468 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 11:44:01,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 11:44:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:01,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:01,469 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:01,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:01,669 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 109 times [2019-12-18 11:44:01,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:01,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751179849] [2019-12-18 11:44:01,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:01,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751179849] [2019-12-18 11:44:01,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224001274] [2019-12-18 11:44:01,762 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:01,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:01,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:02,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:02,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:02,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262568631] [2019-12-18 11:44:02,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:02,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:02,035 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 11:44:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:03,169 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-18 11:44:03,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:03,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:03,171 INFO L225 Difference]: With dead ends: 220 [2019-12-18 11:44:03,171 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 11:44:03,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 11:44:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2019-12-18 11:44:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 11:44:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-18 11:44:03,175 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-18 11:44:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:03,175 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-18 11:44:03,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-18 11:44:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:03,175 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:03,175 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:03,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:03,376 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 110 times [2019-12-18 11:44:03,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:03,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519765794] [2019-12-18 11:44:03,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:03,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519765794] [2019-12-18 11:44:03,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063458926] [2019-12-18 11:44:03,492 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:03,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:03,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:03,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:03,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:03,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:03,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:03,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338903849] [2019-12-18 11:44:03,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:03,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:03,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:03,758 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 18 states. [2019-12-18 11:44:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:05,023 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2019-12-18 11:44:05,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:05,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:05,025 INFO L225 Difference]: With dead ends: 252 [2019-12-18 11:44:05,025 INFO L226 Difference]: Without dead ends: 245 [2019-12-18 11:44:05,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-18 11:44:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 153. [2019-12-18 11:44:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:44:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-18 11:44:05,028 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-18 11:44:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:05,028 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-18 11:44:05,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-18 11:44:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:05,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:05,028 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:05,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:05,229 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:05,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 111 times [2019-12-18 11:44:05,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:05,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123780283] [2019-12-18 11:44:05,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:05,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123780283] [2019-12-18 11:44:05,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465835428] [2019-12-18 11:44:05,319 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:05,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:05,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:05,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:05,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:07,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:07,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:07,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389306421] [2019-12-18 11:44:07,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:07,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:07,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=207, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:07,591 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-18 11:44:08,035 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-18 11:44:08,210 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 11:44:13,644 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:44:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:15,758 INFO L93 Difference]: Finished difference Result 246 states and 529 transitions. [2019-12-18 11:44:15,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:15,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:15,760 INFO L225 Difference]: With dead ends: 246 [2019-12-18 11:44:15,760 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:44:15,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=338, Invalid=652, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:44:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:44:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 152. [2019-12-18 11:44:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:44:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 11:44:15,770 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 11:44:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:15,770 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 11:44:15,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 11:44:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:15,771 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:15,771 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:15,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:15,972 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:15,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 112 times [2019-12-18 11:44:15,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:15,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496133292] [2019-12-18 11:44:15,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:16,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496133292] [2019-12-18 11:44:16,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462694003] [2019-12-18 11:44:16,056 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:16,099 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:16,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:16,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:16,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:16,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:16,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:16,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322878763] [2019-12-18 11:44:16,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:16,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:16,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:16,271 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 11:44:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:17,038 INFO L93 Difference]: Finished difference Result 208 states and 450 transitions. [2019-12-18 11:44:17,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:17,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:17,040 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:44:17,040 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:44:17,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:44:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 154. [2019-12-18 11:44:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 11:44:17,044 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 11:44:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:17,044 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 11:44:17,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 11:44:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:17,045 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:17,045 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:17,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:17,246 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:17,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 113 times [2019-12-18 11:44:17,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:17,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352768079] [2019-12-18 11:44:17,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:17,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352768079] [2019-12-18 11:44:17,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205957517] [2019-12-18 11:44:17,341 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:17,385 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:44:17,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:17,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:17,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:19,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:19,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:19,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716948216] [2019-12-18 11:44:19,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:19,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:19,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:19,756 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 11:44:24,812 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:44:26,895 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:44:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:35,284 INFO L93 Difference]: Finished difference Result 238 states and 518 transitions. [2019-12-18 11:44:35,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:35,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:35,285 INFO L225 Difference]: With dead ends: 238 [2019-12-18 11:44:35,286 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:44:35,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=286, Invalid=524, Unknown=2, NotChecked=0, Total=812 [2019-12-18 11:44:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:44:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2019-12-18 11:44:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:44:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 348 transitions. [2019-12-18 11:44:35,290 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 348 transitions. Word has length 14 [2019-12-18 11:44:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:35,291 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 348 transitions. [2019-12-18 11:44:35,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 348 transitions. [2019-12-18 11:44:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:35,291 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:35,292 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:35,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:35,495 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 114 times [2019-12-18 11:44:35,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:35,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343634701] [2019-12-18 11:44:35,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:35,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343634701] [2019-12-18 11:44:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605825430] [2019-12-18 11:44:35,583 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:35,626 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:35,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:35,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:35,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:35,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:35,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:35,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830028335] [2019-12-18 11:44:35,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:35,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:35,840 INFO L87 Difference]: Start difference. First operand 153 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:36,958 INFO L93 Difference]: Finished difference Result 244 states and 529 transitions. [2019-12-18 11:44:36,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:36,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:36,960 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:44:36,960 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:44:36,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:44:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2019-12-18 11:44:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 11:44:36,965 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 11:44:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:36,965 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 11:44:36,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 11:44:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:36,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:36,966 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:37,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:37,169 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 115 times [2019-12-18 11:44:37,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:37,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900643903] [2019-12-18 11:44:37,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:37,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900643903] [2019-12-18 11:44:37,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747877959] [2019-12-18 11:44:37,272 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:37,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:37,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:37,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:37,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:37,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062996668] [2019-12-18 11:44:37,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:37,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:37,549 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 11:44:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:38,335 INFO L93 Difference]: Finished difference Result 234 states and 505 transitions. [2019-12-18 11:44:38,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:38,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:38,337 INFO L225 Difference]: With dead ends: 234 [2019-12-18 11:44:38,337 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:44:38,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:44:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2019-12-18 11:44:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:44:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 11:44:38,341 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 11:44:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:38,341 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 11:44:38,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 11:44:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:38,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:38,342 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:38,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:38,545 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 116 times [2019-12-18 11:44:38,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:38,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137313374] [2019-12-18 11:44:38,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:38,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137313374] [2019-12-18 11:44:38,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417999527] [2019-12-18 11:44:38,642 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:38,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:38,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:38,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:38,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:39,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:39,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:39,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962308527] [2019-12-18 11:44:39,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:39,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:39,025 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 11:44:39,309 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2019-12-18 11:44:39,530 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:44:40,074 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2019-12-18 11:44:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:44,746 INFO L93 Difference]: Finished difference Result 211 states and 458 transitions. [2019-12-18 11:44:44,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:44,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:44,747 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:44:44,747 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:44:44,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=289, Invalid=579, Unknown=2, NotChecked=0, Total=870 [2019-12-18 11:44:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:44:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2019-12-18 11:44:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:44:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-18 11:44:44,751 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-18 11:44:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:44,751 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-18 11:44:44,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-18 11:44:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:44,751 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:44,752 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:44,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:44,952 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 117 times [2019-12-18 11:44:44,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:44,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487628950] [2019-12-18 11:44:44,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:45,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487628950] [2019-12-18 11:44:45,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094457415] [2019-12-18 11:44:45,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:45,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:45,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:45,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:45,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:45,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:45,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:45,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012792225] [2019-12-18 11:44:45,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:45,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:45,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:45,210 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 18 states. [2019-12-18 11:44:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:45,681 INFO L93 Difference]: Finished difference Result 197 states and 429 transitions. [2019-12-18 11:44:45,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:45,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:45,683 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:44:45,683 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 11:44:45,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=626, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 11:44:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2019-12-18 11:44:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 11:44:45,687 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 11:44:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:45,687 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 11:44:45,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 11:44:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:45,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:45,688 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:45,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:45,891 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:45,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 118 times [2019-12-18 11:44:45,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:45,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117041104] [2019-12-18 11:44:45,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:45,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117041104] [2019-12-18 11:44:45,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916898741] [2019-12-18 11:44:45,982 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:46,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:46,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:46,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:46,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:46,831 WARN L192 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 11:44:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:46,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:46,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:46,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641206194] [2019-12-18 11:44:46,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:46,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:46,833 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:47,593 WARN L192 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2019-12-18 11:44:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:48,024 INFO L93 Difference]: Finished difference Result 212 states and 459 transitions. [2019-12-18 11:44:48,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:48,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:48,025 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:44:48,025 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 11:44:48,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 11:44:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2019-12-18 11:44:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:44:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-18 11:44:48,029 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-18 11:44:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:48,029 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-18 11:44:48,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-18 11:44:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:48,029 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:48,029 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:48,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:48,230 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 119 times [2019-12-18 11:44:48,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:48,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024847633] [2019-12-18 11:44:48,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:48,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024847633] [2019-12-18 11:44:48,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266265003] [2019-12-18 11:44:48,327 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:48,371 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:48,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:48,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:48,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:48,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:48,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:48,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32921882] [2019-12-18 11:44:48,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:48,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:48,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:48,509 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 18 states. [2019-12-18 11:44:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:48,960 INFO L93 Difference]: Finished difference Result 210 states and 457 transitions. [2019-12-18 11:44:48,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:48,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:48,962 INFO L225 Difference]: With dead ends: 210 [2019-12-18 11:44:48,962 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 11:44:48,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 11:44:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2019-12-18 11:44:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:44:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 11:44:48,967 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 11:44:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:48,967 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 11:44:48,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 11:44:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:48,968 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:48,968 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:49,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:49,171 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 120 times [2019-12-18 11:44:49,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:49,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675869768] [2019-12-18 11:44:49,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:49,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675869768] [2019-12-18 11:44:49,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148614141] [2019-12-18 11:44:49,280 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:49,320 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:49,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:49,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:49,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:50,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:50,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:50,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276746796] [2019-12-18 11:44:50,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:50,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:50,030 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 11:44:50,672 WARN L192 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-12-18 11:44:51,291 WARN L192 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:44:52,517 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:44:53,286 WARN L192 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 11:44:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:53,335 INFO L93 Difference]: Finished difference Result 224 states and 482 transitions. [2019-12-18 11:44:53,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:53,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:53,336 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:44:53,336 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:44:53,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=284, Invalid=585, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:44:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:44:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 11:44:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:44:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-18 11:44:53,340 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-18 11:44:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:53,340 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-18 11:44:53,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-18 11:44:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:53,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:53,341 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:53,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:53,542 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 121 times [2019-12-18 11:44:53,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:53,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522794937] [2019-12-18 11:44:53,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:53,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522794937] [2019-12-18 11:44:53,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749591797] [2019-12-18 11:44:53,637 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:53,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:53,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:55,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:55,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:55,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658825579] [2019-12-18 11:44:55,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:55,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:55,897 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-18 11:44:58,154 WARN L192 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 11:44:59,009 WARN L192 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:44:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:59,134 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2019-12-18 11:44:59,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:59,134 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:59,135 INFO L225 Difference]: With dead ends: 254 [2019-12-18 11:44:59,135 INFO L226 Difference]: Without dead ends: 252 [2019-12-18 11:44:59,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=287, Invalid=582, Unknown=1, NotChecked=0, Total=870 [2019-12-18 11:44:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-18 11:44:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 156. [2019-12-18 11:44:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:44:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-18 11:44:59,139 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-18 11:44:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:59,139 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-18 11:44:59,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-18 11:44:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:59,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:59,139 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:59,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:59,340 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 122 times [2019-12-18 11:44:59,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:59,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258985742] [2019-12-18 11:44:59,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:59,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258985742] [2019-12-18 11:44:59,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130228238] [2019-12-18 11:44:59,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:44:59,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:59,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:59,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:59,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:00,189 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_421 Int)) (and (<= c_~j~0 (+ (* 2 v_~i~0_421) 2)) (<= (div (+ (* v_~i~0_421 (- 1)) 1) (- 3)) 2) (<= c_~i~0 (+ v_~i~0_421 c_~j~0)))) is different from true [2019-12-18 11:45:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:00,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:00,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:00,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044388523] [2019-12-18 11:45:00,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:00,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:00,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=189, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:45:00,191 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 18 states. [2019-12-18 11:45:01,314 WARN L192 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 11:45:02,231 WARN L192 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-12-18 11:45:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:02,265 INFO L93 Difference]: Finished difference Result 240 states and 521 transitions. [2019-12-18 11:45:02,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:02,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:02,266 INFO L225 Difference]: With dead ends: 240 [2019-12-18 11:45:02,267 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 11:45:02,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=330, Invalid=665, Unknown=1, NotChecked=60, Total=1056 [2019-12-18 11:45:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 11:45:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 154. [2019-12-18 11:45:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:45:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 11:45:02,275 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 11:45:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:02,275 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 11:45:02,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 11:45:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:02,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:02,275 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:02,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:02,479 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 123 times [2019-12-18 11:45:02,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:02,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399972778] [2019-12-18 11:45:02,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:02,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399972778] [2019-12-18 11:45:02,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548165833] [2019-12-18 11:45:02,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:02,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:02,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:02,608 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:02,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:03,166 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_424 Int)) (and (<= c_~i~0 (+ v_~i~0_424 (* 2 c_~j~0))) (<= (div (+ (* v_~i~0_424 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_424 2)))) is different from true [2019-12-18 11:45:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-18 11:45:03,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:03,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:03,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815078894] [2019-12-18 11:45:03,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:03,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:03,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:03,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=189, Unknown=2, NotChecked=30, Total=306 [2019-12-18 11:45:03,635 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 11:45:04,234 WARN L192 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 13 [2019-12-18 11:45:04,748 WARN L192 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:45:05,134 WARN L192 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 11:45:06,261 WARN L192 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:45:07,181 WARN L192 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:45:12,092 WARN L192 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2019-12-18 11:45:13,498 WARN L192 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-18 11:45:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:13,510 INFO L93 Difference]: Finished difference Result 231 states and 485 transitions. [2019-12-18 11:45:13,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 11:45:13,511 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:13,511 INFO L225 Difference]: With dead ends: 231 [2019-12-18 11:45:13,511 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:45:13,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=419, Invalid=913, Unknown=4, NotChecked=70, Total=1406 [2019-12-18 11:45:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:45:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 157. [2019-12-18 11:45:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:45:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 357 transitions. [2019-12-18 11:45:13,516 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 357 transitions. Word has length 14 [2019-12-18 11:45:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:13,516 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 357 transitions. [2019-12-18 11:45:13,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 357 transitions. [2019-12-18 11:45:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:13,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:13,517 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:13,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:13,718 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 124 times [2019-12-18 11:45:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:13,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498619156] [2019-12-18 11:45:13,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:13,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498619156] [2019-12-18 11:45:13,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135753809] [2019-12-18 11:45:13,811 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:13,852 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:13,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:13,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:13,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:14,444 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 11:45:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:21,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:21,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:21,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662181008] [2019-12-18 11:45:21,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:21,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=212, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:45:21,355 INFO L87 Difference]: Start difference. First operand 157 states and 357 transitions. Second operand 18 states. [2019-12-18 11:45:21,674 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-18 11:45:22,430 WARN L192 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2019-12-18 11:45:22,603 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 11:45:25,068 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:45:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:25,747 INFO L93 Difference]: Finished difference Result 244 states and 528 transitions. [2019-12-18 11:45:25,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:25,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:25,748 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:45:25,749 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:45:25,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=328, Invalid=662, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:45:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:45:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 156. [2019-12-18 11:45:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:45:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-18 11:45:25,753 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-18 11:45:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:25,753 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-18 11:45:25,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-18 11:45:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:25,754 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:25,754 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:25,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:25,954 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 125 times [2019-12-18 11:45:25,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:25,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007106910] [2019-12-18 11:45:25,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:26,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007106910] [2019-12-18 11:45:26,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561103120] [2019-12-18 11:45:26,046 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:26,087 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:26,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:26,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:26,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:27,007 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:45:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:27,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:27,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:27,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163148393] [2019-12-18 11:45:27,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:27,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:27,039 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-18 11:45:27,466 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:45:28,323 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:45:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:29,873 INFO L93 Difference]: Finished difference Result 273 states and 596 transitions. [2019-12-18 11:45:29,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:45:29,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:29,875 INFO L225 Difference]: With dead ends: 273 [2019-12-18 11:45:29,875 INFO L226 Difference]: Without dead ends: 271 [2019-12-18 11:45:29,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=332, Invalid=658, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:45:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-18 11:45:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 163. [2019-12-18 11:45:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-18 11:45:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 380 transitions. [2019-12-18 11:45:29,880 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 380 transitions. Word has length 14 [2019-12-18 11:45:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:29,880 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 380 transitions. [2019-12-18 11:45:29,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 380 transitions. [2019-12-18 11:45:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:29,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:29,881 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:30,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:30,084 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 126 times [2019-12-18 11:45:30,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:30,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357566280] [2019-12-18 11:45:30,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:30,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357566280] [2019-12-18 11:45:30,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090168503] [2019-12-18 11:45:30,168 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:30,212 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:30,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:30,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:30,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:30,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:30,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:30,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934380487] [2019-12-18 11:45:30,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:30,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:30,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:30,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:30,402 INFO L87 Difference]: Start difference. First operand 163 states and 380 transitions. Second operand 18 states. [2019-12-18 11:45:30,899 WARN L192 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-18 11:45:32,266 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:45:32,745 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:45:33,600 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:45:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:33,725 INFO L93 Difference]: Finished difference Result 264 states and 575 transitions. [2019-12-18 11:45:33,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:33,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:33,727 INFO L225 Difference]: With dead ends: 264 [2019-12-18 11:45:33,727 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 11:45:33,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=375, Invalid=746, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 11:45:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 11:45:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2019-12-18 11:45:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 11:45:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 370 transitions. [2019-12-18 11:45:33,731 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 370 transitions. Word has length 14 [2019-12-18 11:45:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:33,731 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 370 transitions. [2019-12-18 11:45:33,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 370 transitions. [2019-12-18 11:45:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:33,732 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:33,732 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:33,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:33,935 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 127 times [2019-12-18 11:45:33,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:33,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733248931] [2019-12-18 11:45:33,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:34,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733248931] [2019-12-18 11:45:34,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320991405] [2019-12-18 11:45:34,019 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:34,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:34,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:34,292 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:45:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:34,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:34,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:34,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610115589] [2019-12-18 11:45:34,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:34,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:34,326 INFO L87 Difference]: Start difference. First operand 161 states and 370 transitions. Second operand 18 states. [2019-12-18 11:45:35,585 WARN L192 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 11:45:36,262 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-12-18 11:45:36,562 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 11:45:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:36,732 INFO L93 Difference]: Finished difference Result 254 states and 555 transitions. [2019-12-18 11:45:36,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:36,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:36,733 INFO L225 Difference]: With dead ends: 254 [2019-12-18 11:45:36,733 INFO L226 Difference]: Without dead ends: 252 [2019-12-18 11:45:36,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-18 11:45:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 163. [2019-12-18 11:45:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-18 11:45:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 377 transitions. [2019-12-18 11:45:36,736 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 377 transitions. Word has length 14 [2019-12-18 11:45:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:36,736 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 377 transitions. [2019-12-18 11:45:36,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 377 transitions. [2019-12-18 11:45:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:36,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:36,737 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:36,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:36,937 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 128 times [2019-12-18 11:45:36,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:36,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556802624] [2019-12-18 11:45:36,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:37,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556802624] [2019-12-18 11:45:37,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401406689] [2019-12-18 11:45:37,032 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:37,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:37,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:37,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:37,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:37,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:37,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:37,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540652805] [2019-12-18 11:45:37,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:37,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:37,234 INFO L87 Difference]: Start difference. First operand 163 states and 377 transitions. Second operand 18 states. [2019-12-18 11:45:37,526 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-18 11:45:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:39,061 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2019-12-18 11:45:39,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:45:39,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:39,063 INFO L225 Difference]: With dead ends: 260 [2019-12-18 11:45:39,063 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 11:45:39,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 11:45:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 11:45:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 161. [2019-12-18 11:45:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 11:45:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 371 transitions. [2019-12-18 11:45:39,067 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 371 transitions. Word has length 14 [2019-12-18 11:45:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:39,067 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 371 transitions. [2019-12-18 11:45:39,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 371 transitions. [2019-12-18 11:45:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:39,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:39,067 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:39,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:39,268 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 129 times [2019-12-18 11:45:39,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:39,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636255973] [2019-12-18 11:45:39,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:39,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636255973] [2019-12-18 11:45:39,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793748574] [2019-12-18 11:45:39,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:39,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:39,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:39,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:39,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:39,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:39,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:39,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952263535] [2019-12-18 11:45:39,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:39,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:39,509 INFO L87 Difference]: Start difference. First operand 161 states and 371 transitions. Second operand 18 states. [2019-12-18 11:45:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:39,915 INFO L93 Difference]: Finished difference Result 201 states and 439 transitions. [2019-12-18 11:45:39,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:39,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:39,917 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:45:39,917 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 11:45:39,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 11:45:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 162. [2019-12-18 11:45:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 11:45:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 371 transitions. [2019-12-18 11:45:39,920 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 371 transitions. Word has length 14 [2019-12-18 11:45:39,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:39,921 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 371 transitions. [2019-12-18 11:45:39,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 371 transitions. [2019-12-18 11:45:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:39,921 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:39,921 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:40,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:40,122 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 130 times [2019-12-18 11:45:40,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:40,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331283243] [2019-12-18 11:45:40,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:40,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331283243] [2019-12-18 11:45:40,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343015277] [2019-12-18 11:45:40,208 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:40,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:40,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:40,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:40,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:40,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:40,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:40,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659004606] [2019-12-18 11:45:40,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:40,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:40,351 INFO L87 Difference]: Start difference. First operand 162 states and 371 transitions. Second operand 18 states. [2019-12-18 11:45:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:40,825 INFO L93 Difference]: Finished difference Result 244 states and 530 transitions. [2019-12-18 11:45:40,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:45:40,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:40,826 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:45:40,827 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:45:40,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=728, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:45:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 161. [2019-12-18 11:45:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 11:45:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 368 transitions. [2019-12-18 11:45:40,832 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 368 transitions. Word has length 14 [2019-12-18 11:45:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:40,832 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 368 transitions. [2019-12-18 11:45:40,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 368 transitions. [2019-12-18 11:45:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:40,833 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:40,833 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:41,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:41,036 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 131 times [2019-12-18 11:45:41,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:41,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816290730] [2019-12-18 11:45:41,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:41,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816290730] [2019-12-18 11:45:41,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42263972] [2019-12-18 11:45:41,133 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:41,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:41,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:41,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:41,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:41,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:41,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:41,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852562597] [2019-12-18 11:45:41,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:41,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:41,330 INFO L87 Difference]: Start difference. First operand 161 states and 368 transitions. Second operand 18 states. [2019-12-18 11:45:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:41,845 INFO L93 Difference]: Finished difference Result 254 states and 558 transitions. [2019-12-18 11:45:41,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:41,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:41,847 INFO L225 Difference]: With dead ends: 254 [2019-12-18 11:45:41,847 INFO L226 Difference]: Without dead ends: 248 [2019-12-18 11:45:41,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-18 11:45:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-18 11:45:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 11:45:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-18 11:45:41,852 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-18 11:45:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:41,852 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-18 11:45:41,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-18 11:45:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:41,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:41,853 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:42,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:42,056 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 132 times [2019-12-18 11:45:42,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:42,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932326184] [2019-12-18 11:45:42,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:42,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932326184] [2019-12-18 11:45:42,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822227870] [2019-12-18 11:45:42,139 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:42,181 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:42,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:42,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:42,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:42,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:42,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:42,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544599317] [2019-12-18 11:45:42,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:42,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:42,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:42,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:42,284 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-18 11:45:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:42,729 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2019-12-18 11:45:42,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:42,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:42,731 INFO L225 Difference]: With dead ends: 255 [2019-12-18 11:45:42,731 INFO L226 Difference]: Without dead ends: 254 [2019-12-18 11:45:42,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-12-18 11:45:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 162. [2019-12-18 11:45:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 11:45:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-18 11:45:42,735 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-18 11:45:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:42,735 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-18 11:45:42,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-18 11:45:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:42,736 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:42,736 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:42,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:42,936 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 133 times [2019-12-18 11:45:42,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:42,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613321561] [2019-12-18 11:45:42,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:43,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613321561] [2019-12-18 11:45:43,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603898824] [2019-12-18 11:45:43,023 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:43,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:43,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:43,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:43,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:43,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362607654] [2019-12-18 11:45:43,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:43,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:43,171 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-18 11:45:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:43,548 INFO L93 Difference]: Finished difference Result 254 states and 559 transitions. [2019-12-18 11:45:43,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:45:43,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:43,550 INFO L225 Difference]: With dead ends: 254 [2019-12-18 11:45:43,550 INFO L226 Difference]: Without dead ends: 253 [2019-12-18 11:45:43,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:45:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-12-18 11:45:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 162. [2019-12-18 11:45:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 11:45:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-18 11:45:43,553 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-18 11:45:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:43,553 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-18 11:45:43,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-18 11:45:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:43,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:43,554 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:43,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:43,755 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 134 times [2019-12-18 11:45:43,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:43,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833947763] [2019-12-18 11:45:43,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:43,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833947763] [2019-12-18 11:45:43,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814604732] [2019-12-18 11:45:43,840 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:43,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:43,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:43,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:43,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:43,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:43,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:43,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921596588] [2019-12-18 11:45:43,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:43,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:43,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:43,997 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-18 11:45:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:44,457 INFO L93 Difference]: Finished difference Result 250 states and 550 transitions. [2019-12-18 11:45:44,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:44,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:44,458 INFO L225 Difference]: With dead ends: 250 [2019-12-18 11:45:44,459 INFO L226 Difference]: Without dead ends: 247 [2019-12-18 11:45:44,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-18 11:45:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 158. [2019-12-18 11:45:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:45:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-18 11:45:44,462 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-18 11:45:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:44,463 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-18 11:45:44,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-18 11:45:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:44,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:44,463 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:44,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:44,664 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 135 times [2019-12-18 11:45:44,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:44,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29947769] [2019-12-18 11:45:44,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:44,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29947769] [2019-12-18 11:45:44,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915829515] [2019-12-18 11:45:44,754 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:44,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:45:44,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:44,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:45:44,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:44,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:44,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:44,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671127153] [2019-12-18 11:45:44,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:44,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:44,910 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 18 states. [2019-12-18 11:45:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:45,487 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2019-12-18 11:45:45,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:45,487 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:45,488 INFO L225 Difference]: With dead ends: 241 [2019-12-18 11:45:45,488 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 11:45:45,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 11:45:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2019-12-18 11:45:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:45:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-18 11:45:45,492 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-18 11:45:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:45,492 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-18 11:45:45,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-18 11:45:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:45,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:45,492 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:45,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:45,693 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 136 times [2019-12-18 11:45:45,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:45,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621062248] [2019-12-18 11:45:45,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:45,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621062248] [2019-12-18 11:45:45,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73885236] [2019-12-18 11:45:45,782 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:45,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:45,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:45,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:45,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:45,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:45,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:45,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209225629] [2019-12-18 11:45:45,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:45,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:45,952 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 18 states. [2019-12-18 11:45:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:46,686 INFO L93 Difference]: Finished difference Result 193 states and 419 transitions. [2019-12-18 11:45:46,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:46,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:46,688 INFO L225 Difference]: With dead ends: 193 [2019-12-18 11:45:46,688 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 11:45:46,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 11:45:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-18 11:45:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:45:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-18 11:45:46,693 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-18 11:45:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:46,694 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-18 11:45:46,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-18 11:45:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:46,695 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:46,695 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:46,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:46,899 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 137 times [2019-12-18 11:45:46,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:46,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344815407] [2019-12-18 11:45:46,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:46,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344815407] [2019-12-18 11:45:46,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346724055] [2019-12-18 11:45:46,997 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:47,038 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:47,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:47,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:47,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:48,797 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:45:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:48,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:48,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:48,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142859566] [2019-12-18 11:45:48,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:48,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:48,799 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. [2019-12-18 11:45:49,576 WARN L192 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:45:50,896 WARN L192 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:45:51,476 WARN L192 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:45:52,212 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 11:45:52,866 WARN L192 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:45:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:52,879 INFO L93 Difference]: Finished difference Result 224 states and 477 transitions. [2019-12-18 11:45:52,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:52,880 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:52,881 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:45:52,881 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:45:52,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=319, Invalid=671, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:45:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:45:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 152. [2019-12-18 11:45:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:45:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2019-12-18 11:45:52,884 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 14 [2019-12-18 11:45:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:52,884 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2019-12-18 11:45:52,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2019-12-18 11:45:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:52,885 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:52,885 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:53,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:53,086 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 138 times [2019-12-18 11:45:53,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:53,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868804075] [2019-12-18 11:45:53,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:53,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868804075] [2019-12-18 11:45:53,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198826932] [2019-12-18 11:45:53,174 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:53,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:53,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:53,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:53,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:53,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:53,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:53,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655569212] [2019-12-18 11:45:53,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:53,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:53,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:53,359 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand 18 states. [2019-12-18 11:45:54,136 WARN L192 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:45:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:54,408 INFO L93 Difference]: Finished difference Result 210 states and 454 transitions. [2019-12-18 11:45:54,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:54,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:54,409 INFO L225 Difference]: With dead ends: 210 [2019-12-18 11:45:54,409 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:45:54,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:45:54,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 150. [2019-12-18 11:45:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 11:45:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-18 11:45:54,412 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-18 11:45:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:54,413 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-18 11:45:54,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-18 11:45:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:54,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:54,413 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:54,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:54,614 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 139 times [2019-12-18 11:45:54,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:54,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191908492] [2019-12-18 11:45:54,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:54,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191908492] [2019-12-18 11:45:54,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316788148] [2019-12-18 11:45:54,761 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 11:45:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:54,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:54,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2019-12-18 11:45:59,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:59,299 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 11:45:59,304 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 11:45:59,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:45:59 BasicIcfg [2019-12-18 11:45:59,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:45:59,305 INFO L168 Benchmark]: Toolchain (without parser) took 288624.34 ms. Allocated memory was 144.7 MB in the beginning and 186.6 MB in the end (delta: 41.9 MB). Free memory was 101.2 MB in the beginning and 120.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:59,306 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 144.7 MB. Free memory is still 120.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:45:59,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 789.05 ms. Allocated memory was 144.7 MB in the beginning and 205.0 MB in the end (delta: 60.3 MB). Free memory was 100.7 MB in the beginning and 162.4 MB in the end (delta: -61.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:59,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.71 ms. Allocated memory is still 205.0 MB. Free memory was 162.4 MB in the beginning and 160.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:59,306 INFO L168 Benchmark]: Boogie Preprocessor took 27.34 ms. Allocated memory is still 205.0 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:59,307 INFO L168 Benchmark]: RCFGBuilder took 444.84 ms. Allocated memory is still 205.0 MB. Free memory was 158.3 MB in the beginning and 138.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:59,307 INFO L168 Benchmark]: TraceAbstraction took 287308.73 ms. Allocated memory was 205.0 MB in the beginning and 186.6 MB in the end (delta: -18.4 MB). Free memory was 137.9 MB in the beginning and 120.1 MB in the end (delta: 17.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:45:59,309 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 144.7 MB. Free memory is still 120.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 789.05 ms. Allocated memory was 144.7 MB in the beginning and 205.0 MB in the end (delta: 60.3 MB). Free memory was 100.7 MB in the beginning and 162.4 MB in the end (delta: -61.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.71 ms. Allocated memory is still 205.0 MB. Free memory was 162.4 MB in the beginning and 160.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.34 ms. Allocated memory is still 205.0 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.84 ms. Allocated memory is still 205.0 MB. Free memory was 158.3 MB in the beginning and 138.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 287308.73 ms. Allocated memory was 205.0 MB in the beginning and 186.6 MB in the end (delta: -18.4 MB). Free memory was 137.9 MB in the beginning and 120.1 MB in the end (delta: 17.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 287.2s, OverallIterations: 153, TraceHistogramMax: 7, AutomataDifference: 146.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1503 SDtfs, 18983 SDslu, 11584 SDs, 0 SdLazy, 6513 SolverSat, 3718 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 37.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4080 GetRequests, 728 SyntacticMatches, 10 SemanticMatches, 3342 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 18835 ImplicationChecksByTransitivity, 198.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 152 MinimizatonAttempts, 6992 StatesRemovedByMinimization, 149 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 95.5s InterpolantComputationTime, 3751 NumberOfCodeBlocks, 3751 NumberOfCodeBlocksAsserted, 489 NumberOfCheckSat, 3452 ConstructedInterpolants, 142 QuantifiedInterpolants, 397165 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13537 ConjunctsInSsa, 1572 ConjunctsInUnsatCore, 299 InterpolantComputations, 7 PerfectInterpolantSequences, 36/2050 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown