/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_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:41:09,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:41:09,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:41:09,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:41:09,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:41:09,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:41:09,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:41:09,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:41:09,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:41:09,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:41:09,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:41:09,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:41:09,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:41:09,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:41:09,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:41:09,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:41:09,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:41:09,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:41:09,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:41:09,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:41:09,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:41:09,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:41:09,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:41:09,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:41:09,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:41:09,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:41:09,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:41:09,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:41:09,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:41:09,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:41:09,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:41:09,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:41:09,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:41:09,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:41:09,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:41:09,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:41:09,381 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 11:41:09,404 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:41:09,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:41:09,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:41:09,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:41:09,409 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:41:09,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:41:09,410 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:41:09,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:41:09,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:41:09,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:41:09,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:41:09,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:41:09,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:41:09,412 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:41:09,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:41:09,413 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:41:09,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:41:09,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:41:09,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:41:09,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:41:09,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:41:09,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:09,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:41:09,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:41:09,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:41:09,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:41:09,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:41:09,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:41:09,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:41:09,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:41:09,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:41:09,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:41:09,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:41:09,710 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:41:09,710 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:41:09,711 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-18 11:41:09,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c728d242a/bc5eeb40d4154d3abdc1a586ae5b9c85/FLAG5cdd0eb64 [2019-12-18 11:41:10,338 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:41:10,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-18 11:41:10,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c728d242a/bc5eeb40d4154d3abdc1a586ae5b9c85/FLAG5cdd0eb64 [2019-12-18 11:41:10,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c728d242a/bc5eeb40d4154d3abdc1a586ae5b9c85 [2019-12-18 11:41:10,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:41:10,613 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:41:10,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:10,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:41:10,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:41:10,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449bc36 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 11:41:10,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:41:10,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:41:11,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,197 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:41:11,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,336 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:41:11,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11 WrapperNode [2019-12-18 11:41:11,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:11,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:41:11,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:41:11,347 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 11:41:11,381 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 11:41:11,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:41:11,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:41:11,418 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 11:41:11,418 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 11:41:11,422 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 11:41:11,423 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 11:41:11,428 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 11:41:11,433 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 11:41:11,435 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 11:41:11,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:41:11,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:41:11,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:41:11,440 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 11:41:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:41:11,502 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:41:11,502 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:41:11,502 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:41:11,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:41:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:41:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:41:11,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:41:11,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:41:11,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:41:11,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:41:11,509 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 11:41:11,884 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:41:11,885 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:41:11,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:11 BoogieIcfgContainer [2019-12-18 11:41:11,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:41:11,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:41:11,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:41:11,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:41:11,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:41:10" (1/3) ... [2019-12-18 11:41:11,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff9de89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:11, skipping insertion in model container [2019-12-18 11:41:11,894 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 11:41:11,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff9de89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:11, skipping insertion in model container [2019-12-18 11:41:11,896 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 11:41:11,898 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-18 11:41:11,906 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:41:11,906 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:41:11,912 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:41:11,913 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:41:11,944 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,944 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,944 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,945 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,945 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,945 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,946 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,946 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,946 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,947 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,947 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,947 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,947 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,948 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,948 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,949 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,949 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,949 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,949 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,950 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,950 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,950 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,951 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,951 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,951 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,951 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,952 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,952 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,952 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,952 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,956 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,957 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,957 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,957 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,958 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,958 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,964 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,964 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,964 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,964 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,965 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,965 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:11,982 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:41:12,002 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:41:12,002 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:41:12,002 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:41:12,002 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:41:12,003 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:41:12,003 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:41:12,003 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:41:12,003 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:41:12,014 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 11:41:12,016 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,053 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,054 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,061 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 11:41:12,065 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,081 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,081 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,083 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 11:41:12,085 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 11:41:12,086 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:41:13,350 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 11:41:13,475 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 11:41:13,475 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 11:41:13,478 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:41:13,486 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:41:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:41:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:41:13,494 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,495 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:41:13,495 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 11:41:13,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133864352] [2019-12-18 11:41:13,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:13,728 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 11:41:13,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133864352] [2019-12-18 11:41:13,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:13,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:41:13,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250756801] [2019-12-18 11:41:13,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:41:13,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:41:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:13,754 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:41:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:13,792 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 11:41:13,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:41:13,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:41:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:13,806 INFO L225 Difference]: With dead ends: 54 [2019-12-18 11:41:13,807 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:41:13,808 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 11:41:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:41:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:41:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:41:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 11:41:13,843 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 11:41:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:13,843 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 11:41:13,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:41:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 11:41:13,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:13,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,845 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:13,845 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 11:41:13,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414020117] [2019-12-18 11:41:13,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:13,924 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 11:41:13,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414020117] [2019-12-18 11:41:13,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:13,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:13,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746939937] [2019-12-18 11:41:13,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:13,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:13,927 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 11:41:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:13,949 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 11:41:13,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:13,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:13,951 INFO L225 Difference]: With dead ends: 42 [2019-12-18 11:41:13,951 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 11:41:13,952 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 11:41:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 11:41:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 11:41:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 11:41:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 11:41:13,960 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 11:41:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:13,961 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 11:41:13,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 11:41:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:13,962 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,962 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:13,962 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,962 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 11:41:13,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698328111] [2019-12-18 11:41:13,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,064 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 11:41:14,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698328111] [2019-12-18 11:41:14,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808699155] [2019-12-18 11:41:14,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,068 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 11:41:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,083 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 11:41:14,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,085 INFO L225 Difference]: With dead ends: 51 [2019-12-18 11:41:14,085 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 11:41:14,086 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 11:41:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 11:41:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 11:41:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 11:41:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 11:41:14,093 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 11:41:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,093 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 11:41:14,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 11:41:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,095 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,095 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,095 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 11:41:14,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927738906] [2019-12-18 11:41:14,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,161 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 11:41:14,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927738906] [2019-12-18 11:41:14,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677869397] [2019-12-18 11:41:14,162 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 11:41:14,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,295 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 11:41:14,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845672813] [2019-12-18 11:41:14,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,298 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 11:41:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,329 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 11:41:14,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,331 INFO L225 Difference]: With dead ends: 56 [2019-12-18 11:41:14,331 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 11:41:14,331 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 11:41:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 11:41:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 11:41:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 11:41:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 11:41:14,339 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 11:41:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,340 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 11:41:14,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 11:41:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,341 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,545 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 11:41:14,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642353752] [2019-12-18 11:41:14,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,631 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 11:41:14,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642353752] [2019-12-18 11:41:14,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889182418] [2019-12-18 11:41:14,632 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 11:41:14,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,754 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 11:41:14,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118763308] [2019-12-18 11:41:14,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,757 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 11:41:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,824 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 11:41:14,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,826 INFO L225 Difference]: With dead ends: 63 [2019-12-18 11:41:14,826 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 11:41:14,827 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 11:41:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 11:41:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 11:41:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 11:41:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 11:41:14,837 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 11:41:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,837 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 11:41:14,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 11:41:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:14,838 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,838 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,045 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,046 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 11:41:15,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476862802] [2019-12-18 11:41:15,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,139 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 11:41:15,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476862802] [2019-12-18 11:41:15,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227432415] [2019-12-18 11:41:15,140 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 11:41:15,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:15,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,265 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 11:41:15,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:15,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493830292] [2019-12-18 11:41:15,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:15,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:15,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,278 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 11:41:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,318 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 11:41:15,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:15,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,320 INFO L225 Difference]: With dead ends: 66 [2019-12-18 11:41:15,320 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 11:41:15,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 11:41:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 11:41:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 11:41:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 11:41:15,336 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 11:41:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,336 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 11:41:15,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 11:41:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,338 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,550 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 11:41:15,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386462364] [2019-12-18 11:41:15,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,627 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 11:41:15,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386462364] [2019-12-18 11:41:15,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:15,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:15,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973839898] [2019-12-18 11:41:15,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:15,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:15,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,630 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 11:41:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,651 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 11:41:15,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,654 INFO L225 Difference]: With dead ends: 68 [2019-12-18 11:41:15,654 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 11:41:15,655 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 11:41:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 11:41:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 11:41:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 11:41:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 11:41:15,666 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 11:41:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,669 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 11:41:15,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 11:41:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,670 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,672 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,672 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 11:41:15,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320815996] [2019-12-18 11:41:15,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,750 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 11:41:15,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320815996] [2019-12-18 11:41:15,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:15,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:15,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137982225] [2019-12-18 11:41:15,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:15,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,754 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 11:41:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,793 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-18 11:41:15,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,795 INFO L225 Difference]: With dead ends: 69 [2019-12-18 11:41:15,795 INFO L226 Difference]: Without dead ends: 68 [2019-12-18 11:41:15,795 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 11:41:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-18 11:41:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-18 11:41:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 11:41:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 11:41:15,804 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 11:41:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,808 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 11:41:15,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 11:41:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,809 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,809 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,810 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 11:41:15,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387719430] [2019-12-18 11:41:15,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,900 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 11:41:15,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387719430] [2019-12-18 11:41:15,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533182092] [2019-12-18 11:41:15,901 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 11:41:15,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:15,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,007 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 11:41:16,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:16,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664137622] [2019-12-18 11:41:16,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:16,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:16,010 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 11:41:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,091 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 11:41:16,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:16,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,094 INFO L225 Difference]: With dead ends: 77 [2019-12-18 11:41:16,094 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 11:41:16,094 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 11:41:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 11:41:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 11:41:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 11:41:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 11:41:16,108 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 11:41:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,109 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 11:41:16,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 11:41:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,112 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,112 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,313 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 11:41:16,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998080747] [2019-12-18 11:41:16,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,422 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 11:41:16,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998080747] [2019-12-18 11:41:16,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094977971] [2019-12-18 11:41:16,424 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 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 11:41:16,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:16,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,554 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 11:41:16,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:16,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571301489] [2019-12-18 11:41:16,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:16,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,556 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 11:41:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,583 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 11:41:16,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:16,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,585 INFO L225 Difference]: With dead ends: 80 [2019-12-18 11:41:16,585 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 11:41:16,586 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 11:41:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 11:41:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 11:41:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:16,592 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,593 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:16,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,594 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,798 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 11:41:16,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090562788] [2019-12-18 11:41:16,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,863 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 11:41:16,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090562788] [2019-12-18 11:41:16,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600092514] [2019-12-18 11:41:16,864 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 11:41:16,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:16,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,975 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 11:41:16,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:16,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651376756] [2019-12-18 11:41:16,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:16,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:16,978 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,048 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-18 11:41:17,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,050 INFO L225 Difference]: With dead ends: 81 [2019-12-18 11:41:17,050 INFO L226 Difference]: Without dead ends: 80 [2019-12-18 11:41:17,051 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 11:41:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-18 11:41:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-18 11:41:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 11:41:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 11:41:17,055 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 11:41:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,056 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 11:41:17,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 11:41:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,057 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,057 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,267 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 11:41:17,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271859169] [2019-12-18 11:41:17,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,320 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 11:41:17,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271859169] [2019-12-18 11:41:17,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395283357] [2019-12-18 11:41:17,321 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 11:41:17,380 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:17,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,459 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 11:41:17,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957792599] [2019-12-18 11:41:17,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,461 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 11:41:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,566 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 11:41:17,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:17,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,568 INFO L225 Difference]: With dead ends: 85 [2019-12-18 11:41:17,568 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 11:41:17,569 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 11:41:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 11:41:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-18 11:41:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:17,574 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,574 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:17,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,575 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,575 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,779 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 11:41:17,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941649222] [2019-12-18 11:41:17,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,849 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 11:41:17,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941649222] [2019-12-18 11:41:17,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001258814] [2019-12-18 11:41:17,851 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 11:41:17,925 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:17,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,026 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 11:41:18,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282991119] [2019-12-18 11:41:18,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,029 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,315 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-18 11:41:18,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:18,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,318 INFO L225 Difference]: With dead ends: 86 [2019-12-18 11:41:18,318 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 11:41:18,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 11:41:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 11:41:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:18,331 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,332 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:18,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,340 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,553 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-18 11:41:18,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263296790] [2019-12-18 11:41:18,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,615 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 11:41:18,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263296790] [2019-12-18 11:41:18,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269814048] [2019-12-18 11:41:18,616 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:18,657 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:18,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,709 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 11:41:18,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124380052] [2019-12-18 11:41:18,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,711 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,782 INFO L93 Difference]: Finished difference Result 90 states and 186 transitions. [2019-12-18 11:41:18,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:18,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,784 INFO L225 Difference]: With dead ends: 90 [2019-12-18 11:41:18,784 INFO L226 Difference]: Without dead ends: 89 [2019-12-18 11:41:18,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-18 11:41:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2019-12-18 11:41:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 11:41:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 11:41:18,789 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 11:41:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,789 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 11:41:18,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 11:41:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,791 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,001 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-18 11:41:19,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290665191] [2019-12-18 11:41:19,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,093 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 11:41:19,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290665191] [2019-12-18 11:41:19,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57371392] [2019-12-18 11:41:19,094 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 11:41:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,187 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 11:41:19,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109947274] [2019-12-18 11:41:19,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,190 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 11:41:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,306 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 11:41:19,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:19,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,307 INFO L225 Difference]: With dead ends: 88 [2019-12-18 11:41:19,307 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 11:41:19,307 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 11:41:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 11:41:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-18 11:41:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 11:41:19,312 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 11:41:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,313 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 11:41:19,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 11:41:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,313 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,518 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-18 11:41:19,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250807313] [2019-12-18 11:41:19,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,588 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 11:41:19,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250807313] [2019-12-18 11:41:19,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557872276] [2019-12-18 11:41:19,589 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:19,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:19,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:19,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,690 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 11:41:19,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:19,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955081772] [2019-12-18 11:41:19,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:19,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:19,693 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 11:41:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,888 INFO L93 Difference]: Finished difference Result 90 states and 186 transitions. [2019-12-18 11:41:19,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:19,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,890 INFO L225 Difference]: With dead ends: 90 [2019-12-18 11:41:19,890 INFO L226 Difference]: Without dead ends: 89 [2019-12-18 11:41:19,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-18 11:41:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2019-12-18 11:41:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 11:41:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 11:41:19,894 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 11:41:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,894 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 11:41:19,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 11:41:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,895 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,895 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,104 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 11:41:20,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504173419] [2019-12-18 11:41:20,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,167 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 11:41:20,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504173419] [2019-12-18 11:41:20,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369270194] [2019-12-18 11:41:20,168 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 11:41:20,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:20,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,278 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 11:41:20,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:20,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799830247] [2019-12-18 11:41:20,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:20,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:20,280 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 11:41:20,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,385 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 11:41:20,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:20,385 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,386 INFO L225 Difference]: With dead ends: 92 [2019-12-18 11:41:20,386 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 11:41:20,386 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 11:41:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 11:41:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 11:41:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 11:41:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 11:41:20,391 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 11:41:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,391 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 11:41:20,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 11:41:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,392 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,596 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 11:41:20,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561828497] [2019-12-18 11:41:20,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,687 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 11:41:20,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561828497] [2019-12-18 11:41:20,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202690325] [2019-12-18 11:41:20,688 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 11:41:20,738 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:20,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:20,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,858 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 11:41:20,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:20,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958426817] [2019-12-18 11:41:20,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:20,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,861 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 11:41:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,906 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 11:41:20,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:20,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,908 INFO L225 Difference]: With dead ends: 95 [2019-12-18 11:41:20,908 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 11:41:20,908 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 11:41:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 11:41:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 11:41:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:20,916 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,916 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:20,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,917 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,917 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,122 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-18 11:41:21,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875072665] [2019-12-18 11:41:21,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,206 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 11:41:21,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875072665] [2019-12-18 11:41:21,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021993705] [2019-12-18 11:41:21,207 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 11:41:21,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:21,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,340 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 11:41:21,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954124501] [2019-12-18 11:41:21,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,341 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,449 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-18 11:41:21,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,451 INFO L225 Difference]: With dead ends: 98 [2019-12-18 11:41:21,451 INFO L226 Difference]: Without dead ends: 97 [2019-12-18 11:41:21,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-18 11:41:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-18 11:41:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,455 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,455 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,456 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,456 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,660 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-18 11:41:21,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140618229] [2019-12-18 11:41:21,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,718 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 11:41:21,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140618229] [2019-12-18 11:41:21,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075062974] [2019-12-18 11:41:21,719 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 11:41:21,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:21,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,869 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 11:41:21,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261076813] [2019-12-18 11:41:21,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,872 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,991 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-18 11:41:21,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:21,991 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,993 INFO L225 Difference]: With dead ends: 101 [2019-12-18 11:41:21,993 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 11:41:21,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 11:41:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-18 11:41:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:21,998 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,999 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:21,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,000 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,203 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-18 11:41:22,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526828432] [2019-12-18 11:41:22,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,257 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 11:41:22,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526828432] [2019-12-18 11:41:22,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094881827] [2019-12-18 11:41:22,257 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 11:41:22,301 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:22,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,454 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 11:41:22,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296292173] [2019-12-18 11:41:22,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,456 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,620 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-18 11:41:22,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:22,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,621 INFO L225 Difference]: With dead ends: 105 [2019-12-18 11:41:22,621 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 11:41:22,621 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 11:41:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 11:41:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-18 11:41:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 11:41:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 11:41:22,625 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 11:41:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,626 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 11:41:22,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 11:41:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,627 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,627 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,831 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-18 11:41:22,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162370766] [2019-12-18 11:41:22,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,904 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 11:41:22,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162370766] [2019-12-18 11:41:22,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880199791] [2019-12-18 11:41:22,904 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 11:41:22,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:22,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,010 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 11:41:23,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628199073] [2019-12-18 11:41:23,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,013 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,097 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-18 11:41:23,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:23,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,099 INFO L225 Difference]: With dead ends: 103 [2019-12-18 11:41:23,099 INFO L226 Difference]: Without dead ends: 102 [2019-12-18 11:41:23,099 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 11:41:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-18 11:41:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-18 11:41:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:23,103 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,103 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:23,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,104 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,104 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,308 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-18 11:41:23,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120434378] [2019-12-18 11:41:23,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,363 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 11:41:23,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120434378] [2019-12-18 11:41:23,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890762662] [2019-12-18 11:41:23,364 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 11:41:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,474 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 11:41:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275105570] [2019-12-18 11:41:23,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,477 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,617 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-18 11:41:23,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:23,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,619 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:23,619 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:23,620 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 11:41:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-18 11:41:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:23,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,624 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:23,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,625 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,826 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-18 11:41:23,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966372169] [2019-12-18 11:41:23,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,887 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 11:41:23,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966372169] [2019-12-18 11:41:23,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046696007] [2019-12-18 11:41:23,888 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 11:41:23,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:23,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:23,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,017 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 11:41:24,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581690940] [2019-12-18 11:41:24,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,019 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,171 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:24,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:24,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,173 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:24,173 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:24,174 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 11:41:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-18 11:41:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,178 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,178 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,179 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,179 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,387 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-18 11:41:24,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990326421] [2019-12-18 11:41:24,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,445 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 11:41:24,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990326421] [2019-12-18 11:41:24,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141020941] [2019-12-18 11:41:24,446 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 11:41:24,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:24,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,571 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 11:41:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082056316] [2019-12-18 11:41:24,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,573 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,709 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-18 11:41:24,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:24,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,711 INFO L225 Difference]: With dead ends: 106 [2019-12-18 11:41:24,711 INFO L226 Difference]: Without dead ends: 105 [2019-12-18 11:41:24,711 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 11:41:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-18 11:41:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-18 11:41:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:24,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,715 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:24,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,716 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,919 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-18 11:41:24,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181061580] [2019-12-18 11:41:24,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,971 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 11:41:24,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181061580] [2019-12-18 11:41:24,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511890031] [2019-12-18 11:41:24,971 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 11:41:25,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:25,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,072 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 11:41:25,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880558732] [2019-12-18 11:41:25,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,074 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,248 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 11:41:25,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:25,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,250 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:25,250 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 11:41:25,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 11:41:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-18 11:41:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 11:41:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 11:41:25,253 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 11:41:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,254 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 11:41:25,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 11:41:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:25,255 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,255 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,458 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-18 11:41:25,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121280511] [2019-12-18 11:41:25,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,516 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 11:41:25,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121280511] [2019-12-18 11:41:25,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690879471] [2019-12-18 11:41:25,517 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 11:41:25,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:25,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,645 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 11:41:25,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:25,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826894205] [2019-12-18 11:41:25,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:25,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:25,646 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 11:41:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,834 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:25,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:25,834 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,835 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:25,835 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:25,836 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 11:41:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-18 11:41:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 11:41:25,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 11:41:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,841 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 11:41:25,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 11:41:25,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:25,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,842 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,046 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-18 11:41:26,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280292875] [2019-12-18 11:41:26,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,119 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 11:41:26,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280292875] [2019-12-18 11:41:26,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637114347] [2019-12-18 11:41:26,120 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 11:41:26,168 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:26,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:26,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,259 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 11:41:26,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:26,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095686441] [2019-12-18 11:41:26,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:26,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:26,260 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,435 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-18 11:41:26,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:26,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,436 INFO L225 Difference]: With dead ends: 111 [2019-12-18 11:41:26,436 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:26,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-18 11:41:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:26,441 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,441 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:26,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,442 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,646 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-18 11:41:26,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544795763] [2019-12-18 11:41:26,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,696 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 11:41:26,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544795763] [2019-12-18 11:41:26,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582534802] [2019-12-18 11:41:26,697 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,801 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 11:41:26,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:26,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467787413] [2019-12-18 11:41:26,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:26,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:26,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:26,803 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-18 11:41:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,976 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-18 11:41:26,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:26,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,977 INFO L225 Difference]: With dead ends: 109 [2019-12-18 11:41:26,977 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 11:41:26,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 11:41:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-18 11:41:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 11:41:26,981 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 11:41:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,981 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 11:41:26,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 11:41:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:26,982 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,982 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:27,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,186 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-18 11:41:27,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:27,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391186331] [2019-12-18 11:41:27,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,267 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 11:41:27,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391186331] [2019-12-18 11:41:27,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202723198] [2019-12-18 11:41:27,268 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 11:41:27,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:27,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:27,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:27,420 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 11:41:27,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:27,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:27,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164261901] [2019-12-18 11:41:27,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:27,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:27,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:27,423 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 11:41:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,623 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2019-12-18 11:41:27,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:27,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,624 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:27,624 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:27,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2019-12-18 11:41:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 11:41:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-18 11:41:27,629 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-18 11:41:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,629 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-18 11:41:27,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-18 11:41:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:27,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,631 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:27,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,835 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:27,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-18 11:41:27,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:27,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728722199] [2019-12-18 11:41:27,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,911 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 11:41:27,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728722199] [2019-12-18 11:41:27,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150341886] [2019-12-18 11:41:27,912 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 11:41:28,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:28,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,095 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 11:41:28,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:28,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506956410] [2019-12-18 11:41:28,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:28,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:28,097 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-18 11:41:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,350 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 11:41:28,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:28,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,352 INFO L225 Difference]: With dead ends: 115 [2019-12-18 11:41:28,352 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 11:41:28,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 11:41:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-18 11:41:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 11:41:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 11:41:28,356 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 11:41:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,357 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 11:41:28,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 11:41:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:28,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,357 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:28,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:28,561 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 11:41:28,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:28,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485547853] [2019-12-18 11:41:28,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:28,626 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 11:41:28,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485547853] [2019-12-18 11:41:28,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516662103] [2019-12-18 11:41:28,627 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 11:41:28,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:28,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:28,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:28,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,773 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 11:41:28,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:28,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558326544] [2019-12-18 11:41:28,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:28,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:28,775 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 11:41:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:28,928 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 11:41:28,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:28,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:28,930 INFO L225 Difference]: With dead ends: 107 [2019-12-18 11:41:28,930 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 11:41:28,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 11:41:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 11:41:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 11:41:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 11:41:28,936 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 11:41:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:28,936 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 11:41:28,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 11:41:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:28,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:28,937 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,142 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 11:41:29,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094308809] [2019-12-18 11:41:29,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,219 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 11:41:29,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094308809] [2019-12-18 11:41:29,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172569358] [2019-12-18 11:41:29,220 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:29,263 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:29,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,366 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 11:41:29,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:29,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:29,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686730917] [2019-12-18 11:41:29,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:29,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:29,368 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-18 11:41:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,405 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-18 11:41:29,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:29,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,406 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:29,406 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:29,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-18 11:41:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:29,411 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,411 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:29,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,412 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,613 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-18 11:41:29,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750255914] [2019-12-18 11:41:29,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:29,668 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 11:41:29,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750255914] [2019-12-18 11:41:29,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697823314] [2019-12-18 11:41:29,669 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:29,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:29,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:29,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:29,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:29,832 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 11:41:29,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:29,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:29,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904294897] [2019-12-18 11:41:29,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:29,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:29,834 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,990 INFO L93 Difference]: Finished difference Result 116 states and 249 transitions. [2019-12-18 11:41:29,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:29,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,991 INFO L225 Difference]: With dead ends: 116 [2019-12-18 11:41:29,991 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:29,991 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 11:41:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2019-12-18 11:41:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:29,994 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,995 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:29,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,996 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,199 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-18 11:41:30,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77700789] [2019-12-18 11:41:30,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,276 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 11:41:30,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77700789] [2019-12-18 11:41:30,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691071839] [2019-12-18 11:41:30,277 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 11:41:30,324 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:30,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:30,402 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 11:41:30,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:30,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:30,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216387412] [2019-12-18 11:41:30,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:30,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:30,404 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,520 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-18 11:41:30,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:30,521 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,522 INFO L225 Difference]: With dead ends: 121 [2019-12-18 11:41:30,522 INFO L226 Difference]: Without dead ends: 120 [2019-12-18 11:41:30,522 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 11:41:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-18 11:41:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-18 11:41:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:30,525 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:30,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,526 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:30,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,527 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,730 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-18 11:41:30,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367969697] [2019-12-18 11:41:30,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,790 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 11:41:30,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367969697] [2019-12-18 11:41:30,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218548079] [2019-12-18 11:41:30,791 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 11:41:30,833 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:30,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,614 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 11:41:31,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471023431] [2019-12-18 11:41:31,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,616 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:31,805 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 11:41:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:31,941 INFO L93 Difference]: Finished difference Result 126 states and 265 transitions. [2019-12-18 11:41:31,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:31,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:31,943 INFO L225 Difference]: With dead ends: 126 [2019-12-18 11:41:31,944 INFO L226 Difference]: Without dead ends: 125 [2019-12-18 11:41:31,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-18 11:41:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2019-12-18 11:41:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:31,949 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:31,949 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:31,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:31,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:31,950 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,154 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-18 11:41:32,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621048267] [2019-12-18 11:41:32,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,217 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 11:41:32,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621048267] [2019-12-18 11:41:32,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067852647] [2019-12-18 11:41:32,218 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 11:41:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,338 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 11:41:32,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920759093] [2019-12-18 11:41:32,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,340 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,456 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-18 11:41:32,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:32,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,457 INFO L225 Difference]: With dead ends: 122 [2019-12-18 11:41:32,457 INFO L226 Difference]: Without dead ends: 121 [2019-12-18 11:41:32,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-18 11:41:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-18 11:41:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:32,462 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,462 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:32,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,463 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,667 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-18 11:41:32,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072634164] [2019-12-18 11:41:32,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,745 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 11:41:32,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072634164] [2019-12-18 11:41:32,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130935671] [2019-12-18 11:41:32,746 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 11:41:32,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:32,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:32,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,888 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 11:41:32,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78575002] [2019-12-18 11:41:32,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,890 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:33,081 INFO L93 Difference]: Finished difference Result 131 states and 279 transitions. [2019-12-18 11:41:33,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:33,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:33,085 INFO L225 Difference]: With dead ends: 131 [2019-12-18 11:41:33,085 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 11:41:33,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 11:41:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2019-12-18 11:41:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-18 11:41:33,089 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-18 11:41:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:33,090 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-18 11:41:33,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-18 11:41:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:33,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:33,091 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:33,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,294 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-18 11:41:33,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:33,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988095626] [2019-12-18 11:41:33,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:33,347 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 11:41:33,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988095626] [2019-12-18 11:41:33,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499017412] [2019-12-18 11:41:33,348 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 11:41:33,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:33,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:33,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:33,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:33,500 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 11:41:33,500 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 [1924278421] [2019-12-18 11:41:33,501 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 97 states and 220 transitions. Second operand 14 states. [2019-12-18 11:41:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:33,871 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2019-12-18 11:41:33,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:33,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:33,872 INFO L225 Difference]: With dead ends: 133 [2019-12-18 11:41:33,872 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 11:41:33,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 11:41:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2019-12-18 11:41:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-18 11:41:33,876 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-18 11:41:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:33,876 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-18 11:41:33,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-18 11:41:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:33,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:33,877 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,077 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-18 11:41:34,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592353978] [2019-12-18 11:41:34,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,141 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 11:41:34,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592353978] [2019-12-18 11:41:34,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672285218] [2019-12-18 11:41:34,142 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 11:41:34,187 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:34,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,322 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 11:41:34,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770261234] [2019-12-18 11:41:34,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:34,323 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-18 11:41:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:34,593 INFO L93 Difference]: Finished difference Result 128 states and 270 transitions. [2019-12-18 11:41:34,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:34,594 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:34,595 INFO L225 Difference]: With dead ends: 128 [2019-12-18 11:41:34,595 INFO L226 Difference]: Without dead ends: 127 [2019-12-18 11:41:34,595 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 11:41:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-18 11:41:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2019-12-18 11:41:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-18 11:41:34,598 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-18 11:41:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:34,599 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-18 11:41:34,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-18 11:41:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:34,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:34,599 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:34,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:34,803 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:34,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-18 11:41:34,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:34,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680992120] [2019-12-18 11:41:34,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:34,885 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 11:41:34,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680992120] [2019-12-18 11:41:34,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655587650] [2019-12-18 11:41:34,886 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 11:41:34,952 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:34,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:34,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:34,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:35,047 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 11:41:35,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:35,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:35,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610131279] [2019-12-18 11:41:35,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:35,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:35,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:35,050 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-18 11:41:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:35,200 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2019-12-18 11:41:35,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:35,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:35,201 INFO L225 Difference]: With dead ends: 121 [2019-12-18 11:41:35,201 INFO L226 Difference]: Without dead ends: 120 [2019-12-18 11:41:35,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-18 11:41:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-18 11:41:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-18 11:41:35,204 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-18 11:41:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:35,205 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-18 11:41:35,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-18 11:41:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:35,205 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:35,206 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:35,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:35,409 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-18 11:41:35,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:35,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975725853] [2019-12-18 11:41:35,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:35,473 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 11:41:35,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975725853] [2019-12-18 11:41:35,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416998809] [2019-12-18 11:41:35,474 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 11:41:35,525 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:35,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:35,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:35,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:35,631 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 11:41:35,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:35,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:35,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432855734] [2019-12-18 11:41:35,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:35,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:35,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:35,633 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-18 11:41:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:35,828 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-18 11:41:35,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:35,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:35,830 INFO L225 Difference]: With dead ends: 136 [2019-12-18 11:41:35,830 INFO L226 Difference]: Without dead ends: 135 [2019-12-18 11:41:35,831 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 11:41:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-18 11:41:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-18 11:41:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:35,835 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:35,835 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:35,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:35,836 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:35,836 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:36,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,039 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:36,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-18 11:41:36,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:36,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498196856] [2019-12-18 11:41:36,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,101 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 11:41:36,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498196856] [2019-12-18 11:41:36,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68883859] [2019-12-18 11:41:36,102 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 11:41:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:36,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:36,248 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 11:41:36,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:36,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:36,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145797954] [2019-12-18 11:41:36,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:36,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:36,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:36,250 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:36,916 INFO L93 Difference]: Finished difference Result 147 states and 307 transitions. [2019-12-18 11:41:36,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:36,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:36,918 INFO L225 Difference]: With dead ends: 147 [2019-12-18 11:41:36,918 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 11:41:36,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=298, Unknown=1, NotChecked=0, Total=462 [2019-12-18 11:41:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 11:41:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 99. [2019-12-18 11:41:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:36,923 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:36,923 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:36,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:36,924 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:36,924 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,127 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-18 11:41:37,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436995897] [2019-12-18 11:41:37,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,198 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 11:41:37,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436995897] [2019-12-18 11:41:37,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947818452] [2019-12-18 11:41:37,198 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 11:41:37,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:37,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:37,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:37,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:37,317 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 11:41:37,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:37,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:37,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726108667] [2019-12-18 11:41:37,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:37,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:37,320 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,599 INFO L93 Difference]: Finished difference Result 145 states and 306 transitions. [2019-12-18 11:41:37,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:37,599 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,601 INFO L225 Difference]: With dead ends: 145 [2019-12-18 11:41:37,601 INFO L226 Difference]: Without dead ends: 143 [2019-12-18 11:41:37,601 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 11:41:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-18 11:41:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-18 11:41:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:37,605 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,606 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:37,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,606 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,607 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,808 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-18 11:41:37,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569981467] [2019-12-18 11:41:37,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,875 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 11:41:37,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569981467] [2019-12-18 11:41:37,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501573326] [2019-12-18 11:41:37,876 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 11:41:37,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:37,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:37,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:37,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,010 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 11:41:38,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491259395] [2019-12-18 11:41:38,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,012 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,213 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-18 11:41:38,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:38,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,214 INFO L225 Difference]: With dead ends: 136 [2019-12-18 11:41:38,214 INFO L226 Difference]: Without dead ends: 135 [2019-12-18 11:41:38,215 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 11:41:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-18 11:41:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-18 11:41:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:38,217 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,217 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:38,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,218 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,419 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-18 11:41:38,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117325187] [2019-12-18 11:41:38,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:38,476 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 11:41:38,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117325187] [2019-12-18 11:41:38,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240194166] [2019-12-18 11:41:38,476 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 11:41:38,525 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:38,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,687 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 11:41:38,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108816724] [2019-12-18 11:41:38,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,689 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,963 INFO L93 Difference]: Finished difference Result 132 states and 283 transitions. [2019-12-18 11:41:38,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:38,964 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,965 INFO L225 Difference]: With dead ends: 132 [2019-12-18 11:41:38,965 INFO L226 Difference]: Without dead ends: 131 [2019-12-18 11:41:38,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-18 11:41:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2019-12-18 11:41:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:38,976 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,977 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:38,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,977 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,180 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-18 11:41:39,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196312457] [2019-12-18 11:41:39,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,249 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 11:41:39,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196312457] [2019-12-18 11:41:39,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977330707] [2019-12-18 11:41:39,250 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 11:41:39,294 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:39,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,369 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 11:41:39,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797864433] [2019-12-18 11:41:39,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,372 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:39,587 INFO L93 Difference]: Finished difference Result 131 states and 282 transitions. [2019-12-18 11:41:39,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:39,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:39,589 INFO L225 Difference]: With dead ends: 131 [2019-12-18 11:41:39,589 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 11:41:39,590 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 11:41:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 11:41:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2019-12-18 11:41:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:39,593 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:39,593 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:39,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:39,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:39,594 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,797 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-18 11:41:39,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328496947] [2019-12-18 11:41:39,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,862 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 11:41:39,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328496947] [2019-12-18 11:41:39,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241354826] [2019-12-18 11:41:39,862 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 11:41:39,923 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:39,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,988 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 11:41:39,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250719795] [2019-12-18 11:41:39,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,990 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,102 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-18 11:41:40,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:40,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,104 INFO L225 Difference]: With dead ends: 129 [2019-12-18 11:41:40,104 INFO L226 Difference]: Without dead ends: 128 [2019-12-18 11:41:40,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-18 11:41:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2019-12-18 11:41:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-18 11:41:40,110 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-18 11:41:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,110 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-18 11:41:40,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-18 11:41:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,111 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:40,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:40,314 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-18 11:41:40,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:40,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099338826] [2019-12-18 11:41:40,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:40,377 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 11:41:40,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099338826] [2019-12-18 11:41:40,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942420898] [2019-12-18 11:41:40,378 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 11:41:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:40,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:40,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:41,062 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 11:41:41,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:41,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:41,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456608026] [2019-12-18 11:41:41,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:41,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=127, Unknown=1, NotChecked=0, Total=182 [2019-12-18 11:41:41,064 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-18 11:41:41,561 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 11:41:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:41,782 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2019-12-18 11:41:41,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:41,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:41,784 INFO L225 Difference]: With dead ends: 144 [2019-12-18 11:41:41,784 INFO L226 Difference]: Without dead ends: 143 [2019-12-18 11:41:41,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=337, Unknown=1, NotChecked=0, Total=506 [2019-12-18 11:41:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-18 11:41:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-18 11:41:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:41,788 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:41,789 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:41,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:41,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:41,790 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,993 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-18 11:41:41,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309691206] [2019-12-18 11:41:41,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,062 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 11:41:42,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309691206] [2019-12-18 11:41:42,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677486251] [2019-12-18 11:41:42,063 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 11:41:42,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:42,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:42,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,204 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 11:41:42,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:42,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119999902] [2019-12-18 11:41:42,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:42,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:42,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:42,206 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,467 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2019-12-18 11:41:42,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:42,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,468 INFO L225 Difference]: With dead ends: 136 [2019-12-18 11:41:42,468 INFO L226 Difference]: Without dead ends: 135 [2019-12-18 11:41:42,468 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 11:41:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-18 11:41:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2019-12-18 11:41:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-18 11:41:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-18 11:41:42,472 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-18 11:41:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,472 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-18 11:41:42,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-18 11:41:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:42,473 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,473 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:42,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,674 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-18 11:41:42,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:42,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367262597] [2019-12-18 11:41:42,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,734 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 11:41:42,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367262597] [2019-12-18 11:41:42,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863394659] [2019-12-18 11:41:42,735 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 11:41:42,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:42,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:42,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,880 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 11:41:42,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:42,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53425682] [2019-12-18 11:41:42,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:42,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:42,882 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 14 states. [2019-12-18 11:41:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:43,242 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-18 11:41:43,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:43,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:43,244 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:43,244 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:43,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2019-12-18 11:41:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:43,248 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:43,248 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:43,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:43,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:43,249 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:43,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,453 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-18 11:41:43,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:43,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96993055] [2019-12-18 11:41:43,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,517 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 11:41:43,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96993055] [2019-12-18 11:41:43,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682498347] [2019-12-18 11:41:43,518 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 11:41:43,564 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:43,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:43,666 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 11:41:43,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:43,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:43,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219151883] [2019-12-18 11:41:43,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:43,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:43,668 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:44,004 INFO L93 Difference]: Finished difference Result 153 states and 317 transitions. [2019-12-18 11:41:44,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:44,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:44,006 INFO L225 Difference]: With dead ends: 153 [2019-12-18 11:41:44,006 INFO L226 Difference]: Without dead ends: 151 [2019-12-18 11:41:44,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-18 11:41:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2019-12-18 11:41:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-18 11:41:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-18 11:41:44,010 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-18 11:41:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:44,010 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-18 11:41:44,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-18 11:41:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:44,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:44,011 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:44,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,211 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:44,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-18 11:41:44,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:44,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438484164] [2019-12-18 11:41:44,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,273 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 11:41:44,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438484164] [2019-12-18 11:41:44,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854008817] [2019-12-18 11:41:44,275 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 11:41:44,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:44,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:44,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:44,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:44,393 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 11:41:44,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:44,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:44,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990261391] [2019-12-18 11:41:44,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:44,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:44,395 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-18 11:41:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:45,116 INFO L93 Difference]: Finished difference Result 156 states and 323 transitions. [2019-12-18 11:41:45,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:45,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:45,118 INFO L225 Difference]: With dead ends: 156 [2019-12-18 11:41:45,118 INFO L226 Difference]: Without dead ends: 154 [2019-12-18 11:41:45,119 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 11:41:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-18 11:41:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-12-18 11:41:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-18 11:41:45,123 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-18 11:41:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:45,123 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-18 11:41:45,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-18 11:41:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:45,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:45,124 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:45,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:45,327 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-18 11:41:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:45,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820272167] [2019-12-18 11:41:45,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:45,387 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 11:41:45,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820272167] [2019-12-18 11:41:45,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058196724] [2019-12-18 11:41:45,388 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 11:41:45,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:45,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:45,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:45,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:45,502 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 11:41:45,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:45,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:45,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374443708] [2019-12-18 11:41:45,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:45,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:45,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:45,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:45,504 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-18 11:41:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:45,804 INFO L93 Difference]: Finished difference Result 129 states and 274 transitions. [2019-12-18 11:41:45,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:45,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:45,805 INFO L225 Difference]: With dead ends: 129 [2019-12-18 11:41:45,805 INFO L226 Difference]: Without dead ends: 128 [2019-12-18 11:41:45,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-18 11:41:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-18 11:41:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:45,809 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:45,809 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:45,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:45,810 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:45,810 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:46,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,011 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-18 11:41:46,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:46,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396787149] [2019-12-18 11:41:46,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,076 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 11:41:46,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396787149] [2019-12-18 11:41:46,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754540854] [2019-12-18 11:41:46,077 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 11:41:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:46,191 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 11:41:46,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:46,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:46,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922362731] [2019-12-18 11:41:46,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:46,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:46,192 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:46,457 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-18 11:41:46,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:46,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:46,459 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:46,459 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:46,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2019-12-18 11:41:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:46,462 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:46,462 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:46,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:46,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:46,463 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:46,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:46,667 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-18 11:41:46,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:46,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623785866] [2019-12-18 11:41:46,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:46,734 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 11:41:46,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623785866] [2019-12-18 11:41:46,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521336628] [2019-12-18 11:41:46,735 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 11:41:46,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:46,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:46,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:46,781 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:46,853 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 11:41:46,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:46,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:46,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470842429] [2019-12-18 11:41:46,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:46,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:46,854 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:47,082 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2019-12-18 11:41:47,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:47,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:47,083 INFO L225 Difference]: With dead ends: 146 [2019-12-18 11:41:47,083 INFO L226 Difference]: Without dead ends: 144 [2019-12-18 11:41:47,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-18 11:41:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 99. [2019-12-18 11:41:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-18 11:41:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-18 11:41:47,088 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-18 11:41:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:47,088 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-18 11:41:47,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-18 11:41:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:47,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:47,089 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,293 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-18 11:41:47,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437704187] [2019-12-18 11:41:47,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:47,355 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 11:41:47,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437704187] [2019-12-18 11:41:47,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863751003] [2019-12-18 11:41:47,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:47,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:47,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:47,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:47,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:47,479 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 11:41:47,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:47,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:47,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768651520] [2019-12-18 11:41:47,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:47,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:47,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:47,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:47,481 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:47,762 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-18 11:41:47,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:41:47,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:47,764 INFO L225 Difference]: With dead ends: 140 [2019-12-18 11:41:47,764 INFO L226 Difference]: Without dead ends: 138 [2019-12-18 11:41:47,764 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 11:41:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-18 11:41:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2019-12-18 11:41:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-18 11:41:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2019-12-18 11:41:47,768 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 12 [2019-12-18 11:41:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:47,768 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2019-12-18 11:41:47,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2019-12-18 11:41:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:47,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:47,769 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:47,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:47,973 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-18 11:41:47,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:47,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361312745] [2019-12-18 11:41:47,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:48,044 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 11:41:48,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361312745] [2019-12-18 11:41:48,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791327152] [2019-12-18 11:41:48,045 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:48,088 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:48,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:48,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:48,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:48,823 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 11:41:48,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:48,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:48,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105208917] [2019-12-18 11:41:48,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:48,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:48,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:48,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=124, Unknown=1, NotChecked=0, Total=182 [2019-12-18 11:41:48,824 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand 14 states. [2019-12-18 11:41:49,892 WARN L192 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-18 11:41:50,076 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:41:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:50,114 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2019-12-18 11:41:50,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:50,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:50,116 INFO L225 Difference]: With dead ends: 143 [2019-12-18 11:41:50,116 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 11:41:50,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=196, Invalid=355, Unknown=1, NotChecked=0, Total=552 [2019-12-18 11:41:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 11:41:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2019-12-18 11:41:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-18 11:41:50,120 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-18 11:41:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:50,120 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-18 11:41:50,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-18 11:41:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:50,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:50,121 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:50,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,322 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 11:41:50,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:50,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506242133] [2019-12-18 11:41:50,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:50,407 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 11:41:50,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506242133] [2019-12-18 11:41:50,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854547022] [2019-12-18 11:41:50,407 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 11:41:50,467 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:50,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:50,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:50,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:50,543 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 11:41:50,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:50,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:50,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209618563] [2019-12-18 11:41:50,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:50,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:50,545 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 16 states. [2019-12-18 11:41:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:50,689 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-18 11:41:50,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:50,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:50,691 INFO L225 Difference]: With dead ends: 122 [2019-12-18 11:41:50,691 INFO L226 Difference]: Without dead ends: 121 [2019-12-18 11:41:50,691 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 11:41:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-18 11:41:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-18 11:41:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-18 11:41:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-18 11:41:50,694 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-18 11:41:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:50,695 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-18 11:41:50,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-18 11:41:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:50,695 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:50,696 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:50,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:50,899 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-18 11:41:50,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:50,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931818967] [2019-12-18 11:41:50,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:50,989 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 11:41:50,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931818967] [2019-12-18 11:41:50,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351699326] [2019-12-18 11:41:50,990 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 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 11:41:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:51,031 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:51,097 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 11:41:51,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:41:51,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-18 11:41:51,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387603587] [2019-12-18 11:41:51,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:41:51,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:41:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:51,098 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-18 11:41:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:51,128 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-18 11:41:51,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:51,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-18 11:41:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:51,129 INFO L225 Difference]: With dead ends: 149 [2019-12-18 11:41:51,129 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 11:41:51,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:51,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 11:41:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-18 11:41:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:41:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-18 11:41:51,134 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-18 11:41:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:51,134 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-18 11:41:51,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:41:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-18 11:41:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:51,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:51,135 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:51,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,338 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:51,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-18 11:41:51,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:51,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869033822] [2019-12-18 11:41:51,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:51,413 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 11:41:51,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869033822] [2019-12-18 11:41:51,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977751316] [2019-12-18 11:41:51,414 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,459 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:51,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:51,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:51,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:51,565 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 11:41:51,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:51,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:51,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971623950] [2019-12-18 11:41:51,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:51,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:51,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:51,567 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-18 11:41:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:51,734 INFO L93 Difference]: Finished difference Result 161 states and 371 transitions. [2019-12-18 11:41:51,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:51,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:51,736 INFO L225 Difference]: With dead ends: 161 [2019-12-18 11:41:51,736 INFO L226 Difference]: Without dead ends: 160 [2019-12-18 11:41:51,736 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 11:41:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-18 11:41:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2019-12-18 11:41:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:41:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-18 11:41:51,748 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-18 11:41:51,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:51,748 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-18 11:41:51,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-18 11:41:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:51,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:51,749 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:51,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:51,950 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-18 11:41:51,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:51,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136522483] [2019-12-18 11:41:51,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,013 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 11:41:52,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136522483] [2019-12-18 11:41:52,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047464861] [2019-12-18 11:41:52,013 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,073 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:52,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:52,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:52,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:52,181 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 11:41:52,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:52,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:52,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224511736] [2019-12-18 11:41:52,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:52,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:52,182 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 16 states. [2019-12-18 11:41:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,337 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-18 11:41:52,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:52,337 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,339 INFO L225 Difference]: With dead ends: 171 [2019-12-18 11:41:52,339 INFO L226 Difference]: Without dead ends: 170 [2019-12-18 11:41:52,339 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 11:41:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-18 11:41:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2019-12-18 11:41:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:41:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-18 11:41:52,344 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-18 11:41:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,344 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-18 11:41:52,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-18 11:41:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,345 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,345 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:52,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,548 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:52,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-18 11:41:52,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:52,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614003021] [2019-12-18 11:41:52,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,620 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 11:41:52,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614003021] [2019-12-18 11:41:52,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111923285] [2019-12-18 11:41:52,620 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:52,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:53,235 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 11:41:53,236 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 11:41:53,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:53,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:53,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91655481] [2019-12-18 11:41:53,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:53,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:53,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:53,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:53,237 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 16 states. [2019-12-18 11:41:53,659 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 11:41:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:53,679 INFO L93 Difference]: Finished difference Result 173 states and 395 transitions. [2019-12-18 11:41:53,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:53,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:53,681 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:41:53,681 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 11:41:53,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 11:41:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2019-12-18 11:41:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:41:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-18 11:41:53,685 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-18 11:41:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:53,685 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-18 11:41:53,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-18 11:41:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:53,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:53,686 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:53,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:53,890 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-18 11:41:53,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:53,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818955195] [2019-12-18 11:41:53,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:53,965 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 11:41:53,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818955195] [2019-12-18 11:41:53,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613344361] [2019-12-18 11:41:53,965 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:54,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:54,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:54,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:54,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:54,094 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 11:41:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:54,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:54,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923778817] [2019-12-18 11:41:54,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:54,097 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 16 states. [2019-12-18 11:41:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:54,255 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-18 11:41:54,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:54,256 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:54,257 INFO L225 Difference]: With dead ends: 176 [2019-12-18 11:41:54,257 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 11:41:54,257 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 11:41:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 11:41:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2019-12-18 11:41:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:41:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-18 11:41:54,262 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-18 11:41:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:54,262 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-18 11:41:54,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-18 11:41:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:54,263 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:54,263 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:54,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:54,466 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:54,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-18 11:41:54,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:54,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590072418] [2019-12-18 11:41:54,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:54,530 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 11:41:54,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590072418] [2019-12-18 11:41:54,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021502640] [2019-12-18 11:41:54,531 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:54,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:54,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:54,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:54,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:56,588 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:41:56,589 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 11:41:56,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:56,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:56,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530362521] [2019-12-18 11:41:56,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:56,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=157, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:41:56,590 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-18 11:41:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:56,813 INFO L93 Difference]: Finished difference Result 189 states and 432 transitions. [2019-12-18 11:41:56,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:56,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:56,815 INFO L225 Difference]: With dead ends: 189 [2019-12-18 11:41:56,815 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:41:56,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=190, Invalid=315, Unknown=1, NotChecked=0, Total=506 [2019-12-18 11:41:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:41:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2019-12-18 11:41:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 11:41:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-18 11:41:56,819 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-18 11:41:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:56,820 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-18 11:41:56,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-18 11:41:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:56,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:56,820 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:57,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:57,021 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-18 11:41:57,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:57,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227137180] [2019-12-18 11:41:57,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:57,092 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 11:41:57,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227137180] [2019-12-18 11:41:57,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318433581] [2019-12-18 11:41:57,093 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:57,135 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:57,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:57,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:57,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:57,786 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 11:41:57,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:57,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:57,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839796568] [2019-12-18 11:41:57,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:57,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:57,787 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 16 states. [2019-12-18 11:41:58,023 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:41:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:58,480 INFO L93 Difference]: Finished difference Result 198 states and 450 transitions. [2019-12-18 11:41:58,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:58,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:58,482 INFO L225 Difference]: With dead ends: 198 [2019-12-18 11:41:58,482 INFO L226 Difference]: Without dead ends: 197 [2019-12-18 11:41:58,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-18 11:41:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2019-12-18 11:41:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:41:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-18 11:41:58,487 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-18 11:41:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:58,487 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-18 11:41:58,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-18 11:41:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:58,488 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:58,488 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:58,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:58,691 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-18 11:41:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:58,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065227029] [2019-12-18 11:41:58,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:58,767 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 11:41:58,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065227029] [2019-12-18 11:41:58,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447930399] [2019-12-18 11:41:58,768 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:58,812 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:58,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:58,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:58,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:59,165 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 11:41:59,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:59,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:59,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487513486] [2019-12-18 11:41:59,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:59,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:59,167 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-18 11:41:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:59,490 INFO L93 Difference]: Finished difference Result 178 states and 406 transitions. [2019-12-18 11:41:59,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:59,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:59,492 INFO L225 Difference]: With dead ends: 178 [2019-12-18 11:41:59,492 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 11:41:59,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 11:41:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2019-12-18 11:41:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 11:41:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 348 transitions. [2019-12-18 11:41:59,498 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 348 transitions. Word has length 13 [2019-12-18 11:41:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:59,498 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 348 transitions. [2019-12-18 11:41:59,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 348 transitions. [2019-12-18 11:41:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:59,498 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:59,499 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:59,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:59,702 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-18 11:41:59,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:59,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59605141] [2019-12-18 11:41:59,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:59,776 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 11:41:59,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59605141] [2019-12-18 11:41:59,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349683994] [2019-12-18 11:41:59,776 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:59,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:59,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:59,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:59,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:59,931 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 11:41:59,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:59,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:59,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366843873] [2019-12-18 11:41:59,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:59,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:59,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:59,933 INFO L87 Difference]: Start difference. First operand 145 states and 348 transitions. Second operand 16 states. [2019-12-18 11:42:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:00,093 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-18 11:42:00,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:00,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:00,095 INFO L225 Difference]: With dead ends: 175 [2019-12-18 11:42:00,095 INFO L226 Difference]: Without dead ends: 174 [2019-12-18 11:42:00,096 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 11:42:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-18 11:42:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2019-12-18 11:42:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-18 11:42:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-18 11:42:00,101 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-18 11:42:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:00,101 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-18 11:42:00,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-18 11:42:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:00,102 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:00,102 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:00,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:00,306 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-18 11:42:00,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:00,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647157650] [2019-12-18 11:42:00,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:00,387 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 11:42:00,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647157650] [2019-12-18 11:42:00,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720504232] [2019-12-18 11:42:00,388 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:00,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:00,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:00,540 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 11:42:00,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:00,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:00,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17951931] [2019-12-18 11:42:00,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:00,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:00,542 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-18 11:42:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:00,826 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-18 11:42:00,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:00,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:00,828 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:00,828 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:00,829 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 11:42:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2019-12-18 11:42:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-18 11:42:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-18 11:42:00,833 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-18 11:42:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:00,833 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-18 11:42:00,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-18 11:42:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:00,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:00,834 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:01,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,038 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-18 11:42:01,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:01,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835083968] [2019-12-18 11:42:01,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,106 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 11:42:01,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835083968] [2019-12-18 11:42:01,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354642890] [2019-12-18 11:42:01,106 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 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 11:42:01,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:01,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:01,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:01,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:01,263 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 11:42:01,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:01,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:01,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526696983] [2019-12-18 11:42:01,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:01,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:01,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:01,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:01,264 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 16 states. [2019-12-18 11:42:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,631 INFO L93 Difference]: Finished difference Result 211 states and 478 transitions. [2019-12-18 11:42:01,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:01,632 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,633 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:42:01,633 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:42:01,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:42:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2019-12-18 11:42:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-18 11:42:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-18 11:42:01,638 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-18 11:42:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,639 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-18 11:42:01,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-18 11:42:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,639 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:01,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,843 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-18 11:42:01,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:01,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271213909] [2019-12-18 11:42:01,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:01,913 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 11:42:01,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271213909] [2019-12-18 11:42:01,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544582523] [2019-12-18 11:42:01,914 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:01,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:42:01,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:01,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 11:42:01,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,034 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 11:42:02,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975919563] [2019-12-18 11:42:02,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,036 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-18 11:42:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:02,297 INFO L93 Difference]: Finished difference Result 207 states and 468 transitions. [2019-12-18 11:42:02,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:02,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:02,299 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:42:02,299 INFO L226 Difference]: Without dead ends: 202 [2019-12-18 11:42:02,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:42:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-18 11:42:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2019-12-18 11:42:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 11:42:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-18 11:42:02,304 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 13 [2019-12-18 11:42:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:02,304 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-18 11:42:02,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-18 11:42:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:02,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:02,305 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:02,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,509 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-18 11:42:02,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:02,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067776653] [2019-12-18 11:42:02,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,579 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 11:42:02,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067776653] [2019-12-18 11:42:02,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358913806] [2019-12-18 11:42:02,580 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:02,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:02,632 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:02,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,759 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 11:42:02,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702271478] [2019-12-18 11:42:02,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,760 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 16 states. [2019-12-18 11:42:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:03,979 INFO L93 Difference]: Finished difference Result 208 states and 476 transitions. [2019-12-18 11:42:03,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:03,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:03,981 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:42:03,981 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:42:03,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:42:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 152. [2019-12-18 11:42:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 371 transitions. [2019-12-18 11:42:03,985 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 371 transitions. Word has length 13 [2019-12-18 11:42:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:03,986 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 371 transitions. [2019-12-18 11:42:03,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 371 transitions. [2019-12-18 11:42:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:03,986 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:03,986 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:04,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:04,187 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-18 11:42:04,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:04,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512960651] [2019-12-18 11:42:04,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:04,256 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 11:42:04,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512960651] [2019-12-18 11:42:04,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880923800] [2019-12-18 11:42:04,257 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:04,300 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:04,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:04,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:04,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:04,498 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 11:42:04,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:04,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:04,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755585357] [2019-12-18 11:42:04,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:04,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:04,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:04,500 INFO L87 Difference]: Start difference. First operand 152 states and 371 transitions. Second operand 16 states. [2019-12-18 11:42:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:05,002 INFO L93 Difference]: Finished difference Result 216 states and 496 transitions. [2019-12-18 11:42:05,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:05,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:05,005 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:42:05,005 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:42:05,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:42:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2019-12-18 11:42:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 11:42:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-18 11:42:05,012 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 13 [2019-12-18 11:42:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:05,012 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-18 11:42:05,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-18 11:42:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:05,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:05,013 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:05,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,214 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-18 11:42:05,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:05,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791315747] [2019-12-18 11:42:05,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:05,327 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 11:42:05,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791315747] [2019-12-18 11:42:05,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892854359] [2019-12-18 11:42:05,328 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,402 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:05,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:05,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:05,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:05,632 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 11:42:05,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:05,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:05,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82298624] [2019-12-18 11:42:05,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:05,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:05,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:05,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:05,634 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 16 states. [2019-12-18 11:42:06,034 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2019-12-18 11:42:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:06,169 INFO L93 Difference]: Finished difference Result 201 states and 460 transitions. [2019-12-18 11:42:06,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:06,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:06,171 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:42:06,171 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 11:42:06,172 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 11:42:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 11:42:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2019-12-18 11:42:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 11:42:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 359 transitions. [2019-12-18 11:42:06,175 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 359 transitions. Word has length 13 [2019-12-18 11:42:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:06,176 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 359 transitions. [2019-12-18 11:42:06,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 359 transitions. [2019-12-18 11:42:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:06,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:06,177 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:06,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,379 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-18 11:42:06,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:06,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088002867] [2019-12-18 11:42:06,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:06,464 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 11:42:06,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088002867] [2019-12-18 11:42:06,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868033987] [2019-12-18 11:42:06,465 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 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 11:42:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:06,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:06,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:06,629 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 11:42:06,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:06,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:06,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34986598] [2019-12-18 11:42:06,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:06,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:06,631 INFO L87 Difference]: Start difference. First operand 149 states and 359 transitions. Second operand 16 states. [2019-12-18 11:42:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:06,770 INFO L93 Difference]: Finished difference Result 175 states and 401 transitions. [2019-12-18 11:42:06,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:06,770 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:06,772 INFO L225 Difference]: With dead ends: 175 [2019-12-18 11:42:06,772 INFO L226 Difference]: Without dead ends: 174 [2019-12-18 11:42:06,772 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 11:42:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-18 11:42:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 154. [2019-12-18 11:42:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-18 11:42:06,776 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-18 11:42:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:06,777 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-18 11:42:06,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-18 11:42:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:06,777 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:06,777 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:06,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,978 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-18 11:42:06,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:06,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897863622] [2019-12-18 11:42:06,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:07,082 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 11:42:07,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897863622] [2019-12-18 11:42:07,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498875065] [2019-12-18 11:42:07,083 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:07,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:07,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:07,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:07,277 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 11:42:07,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:07,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:07,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001152708] [2019-12-18 11:42:07,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:07,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:07,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:07,279 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-18 11:42:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:07,570 INFO L93 Difference]: Finished difference Result 197 states and 450 transitions. [2019-12-18 11:42:07,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:07,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:07,572 INFO L225 Difference]: With dead ends: 197 [2019-12-18 11:42:07,572 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 11:42:07,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 11:42:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2019-12-18 11:42:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:42:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 372 transitions. [2019-12-18 11:42:07,576 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 372 transitions. Word has length 13 [2019-12-18 11:42:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:07,579 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 372 transitions. [2019-12-18 11:42:07,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 372 transitions. [2019-12-18 11:42:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:07,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:07,580 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:07,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,783 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-18 11:42:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:07,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158488362] [2019-12-18 11:42:07,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:07,846 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 11:42:07,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158488362] [2019-12-18 11:42:07,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347411683] [2019-12-18 11:42:07,846 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:07,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:07,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:07,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:07,977 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 11:42:07,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:07,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:07,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326046408] [2019-12-18 11:42:07,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:07,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:07,978 INFO L87 Difference]: Start difference. First operand 153 states and 372 transitions. Second operand 16 states. [2019-12-18 11:42:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:08,244 INFO L93 Difference]: Finished difference Result 219 states and 493 transitions. [2019-12-18 11:42:08,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:08,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:08,247 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:42:08,247 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 11:42:08,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 11:42:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 154. [2019-12-18 11:42:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-18 11:42:08,251 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-18 11:42:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:08,251 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-18 11:42:08,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-18 11:42:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:08,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:08,252 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:08,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:08,454 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:08,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:08,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-18 11:42:08,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:08,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323446653] [2019-12-18 11:42:08,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:08,532 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 11:42:08,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323446653] [2019-12-18 11:42:08,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627276025] [2019-12-18 11:42:08,533 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:08,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:08,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:08,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:08,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:08,672 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 11:42:08,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:08,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:08,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508605805] [2019-12-18 11:42:08,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:08,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:08,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:08,674 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-18 11:42:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:08,983 INFO L93 Difference]: Finished difference Result 207 states and 472 transitions. [2019-12-18 11:42:08,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:08,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:08,985 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:42:08,985 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:42:08,986 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 11:42:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:42:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2019-12-18 11:42:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 368 transitions. [2019-12-18 11:42:08,990 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 368 transitions. Word has length 13 [2019-12-18 11:42:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:08,990 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 368 transitions. [2019-12-18 11:42:08,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 368 transitions. [2019-12-18 11:42:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:08,991 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:08,991 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:09,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:09,194 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:09,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-18 11:42:09,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:09,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256541607] [2019-12-18 11:42:09,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:09,266 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 11:42:09,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256541607] [2019-12-18 11:42:09,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450192661] [2019-12-18 11:42:09,268 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:09,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:09,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:09,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:09,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:09,443 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 11:42:09,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:09,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:09,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265466256] [2019-12-18 11:42:09,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:09,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:09,445 INFO L87 Difference]: Start difference. First operand 152 states and 368 transitions. Second operand 16 states. [2019-12-18 11:42:09,770 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:10,069 INFO L93 Difference]: Finished difference Result 222 states and 496 transitions. [2019-12-18 11:42:10,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:10,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:10,071 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:10,071 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:42:10,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:42:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 154. [2019-12-18 11:42:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-18 11:42:10,075 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-18 11:42:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:10,075 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-18 11:42:10,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-18 11:42:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:10,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:10,076 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:10,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:10,279 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:10,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-18 11:42:10,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:10,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465755825] [2019-12-18 11:42:10,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:10,355 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 11:42:10,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465755825] [2019-12-18 11:42:10,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413496299] [2019-12-18 11:42:10,356 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:10,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:10,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:10,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:10,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:10,939 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_228 Int)) (and (<= c_~j~0 (+ v_~i~0_228 c_~i~0 2)) (<= (div (+ (* v_~i~0_228 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ (* 2 v_~i~0_228) 2)))) is different from true [2019-12-18 11:42:10,940 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 11:42:10,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:10,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:10,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541363366] [2019-12-18 11:42:10,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:10,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=141, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:42:10,941 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-18 11:42:11,353 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2019-12-18 11:42:12,207 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-18 11:42:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:12,985 INFO L93 Difference]: Finished difference Result 234 states and 533 transitions. [2019-12-18 11:42:12,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:12,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:12,987 INFO L225 Difference]: With dead ends: 234 [2019-12-18 11:42:12,987 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 11:42:12,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=418, Unknown=2, NotChecked=48, Total=702 [2019-12-18 11:42:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 11:42:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 156. [2019-12-18 11:42:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 384 transitions. [2019-12-18 11:42:12,992 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 384 transitions. Word has length 13 [2019-12-18 11:42:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:12,992 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 384 transitions. [2019-12-18 11:42:12,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 384 transitions. [2019-12-18 11:42:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:12,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:12,993 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:13,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:13,196 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-18 11:42:13,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:13,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004082175] [2019-12-18 11:42:13,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:13,266 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 11:42:13,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004082175] [2019-12-18 11:42:13,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334432764] [2019-12-18 11:42:13,267 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:13,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:13,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:13,399 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 11:42:13,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:13,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:13,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478631605] [2019-12-18 11:42:13,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:13,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:13,401 INFO L87 Difference]: Start difference. First operand 156 states and 384 transitions. Second operand 16 states. [2019-12-18 11:42:14,055 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:14,615 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:42:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:14,740 INFO L93 Difference]: Finished difference Result 235 states and 531 transitions. [2019-12-18 11:42:14,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:14,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:14,743 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:42:14,743 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 11:42:14,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 11:42:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 155. [2019-12-18 11:42:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 380 transitions. [2019-12-18 11:42:14,748 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 380 transitions. Word has length 13 [2019-12-18 11:42:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:14,748 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 380 transitions. [2019-12-18 11:42:14,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 380 transitions. [2019-12-18 11:42:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:14,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:14,749 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:14,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:14,952 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-18 11:42:14,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:14,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426616338] [2019-12-18 11:42:14,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:15,025 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 11:42:15,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426616338] [2019-12-18 11:42:15,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388732394] [2019-12-18 11:42:15,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:15,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:15,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:15,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:15,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:15,160 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 11:42:15,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:15,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:15,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187236870] [2019-12-18 11:42:15,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:15,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:15,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:15,162 INFO L87 Difference]: Start difference. First operand 155 states and 380 transitions. Second operand 16 states. [2019-12-18 11:42:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:15,446 INFO L93 Difference]: Finished difference Result 213 states and 487 transitions. [2019-12-18 11:42:15,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:15,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:15,449 INFO L225 Difference]: With dead ends: 213 [2019-12-18 11:42:15,449 INFO L226 Difference]: Without dead ends: 212 [2019-12-18 11:42:15,449 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 11:42:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-18 11:42:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 157. [2019-12-18 11:42:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 388 transitions. [2019-12-18 11:42:15,454 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 388 transitions. Word has length 13 [2019-12-18 11:42:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:15,454 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 388 transitions. [2019-12-18 11:42:15,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 388 transitions. [2019-12-18 11:42:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:15,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:15,455 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:15,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:15,656 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-18 11:42:15,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:15,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776102084] [2019-12-18 11:42:15,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:15,731 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 11:42:15,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776102084] [2019-12-18 11:42:15,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278723493] [2019-12-18 11:42:15,731 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:15,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:15,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:15,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:15,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:15,864 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 11:42:15,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:15,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:15,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177440129] [2019-12-18 11:42:15,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:15,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:15,866 INFO L87 Difference]: Start difference. First operand 157 states and 388 transitions. Second operand 16 states. [2019-12-18 11:42:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:16,180 INFO L93 Difference]: Finished difference Result 224 states and 519 transitions. [2019-12-18 11:42:16,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:16,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:16,183 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:42:16,183 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:42:16,183 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 11:42:16,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:42:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2019-12-18 11:42:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 384 transitions. [2019-12-18 11:42:16,187 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 384 transitions. Word has length 13 [2019-12-18 11:42:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:16,187 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 384 transitions. [2019-12-18 11:42:16,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 384 transitions. [2019-12-18 11:42:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:16,188 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:16,188 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:16,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:16,391 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-18 11:42:16,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:16,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466238319] [2019-12-18 11:42:16,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:16,456 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 11:42:16,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466238319] [2019-12-18 11:42:16,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856537230] [2019-12-18 11:42:16,457 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:16,504 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:16,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:16,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:16,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:16,598 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 11:42:16,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:16,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:16,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528658099] [2019-12-18 11:42:16,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:16,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:16,600 INFO L87 Difference]: Start difference. First operand 156 states and 384 transitions. Second operand 16 states. [2019-12-18 11:42:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:16,871 INFO L93 Difference]: Finished difference Result 233 states and 537 transitions. [2019-12-18 11:42:16,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:16,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:16,873 INFO L225 Difference]: With dead ends: 233 [2019-12-18 11:42:16,873 INFO L226 Difference]: Without dead ends: 232 [2019-12-18 11:42:16,874 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 11:42:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-18 11:42:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 157. [2019-12-18 11:42:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 388 transitions. [2019-12-18 11:42:16,877 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 388 transitions. Word has length 13 [2019-12-18 11:42:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:16,877 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 388 transitions. [2019-12-18 11:42:16,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 388 transitions. [2019-12-18 11:42:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:16,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:16,878 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,079 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-18 11:42:17,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12688313] [2019-12-18 11:42:17,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,148 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 11:42:17,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12688313] [2019-12-18 11:42:17,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661742491] [2019-12-18 11:42:17,149 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:17,190 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:17,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:17,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:17,287 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 11:42:17,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:17,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:17,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258585570] [2019-12-18 11:42:17,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:17,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:17,288 INFO L87 Difference]: Start difference. First operand 157 states and 388 transitions. Second operand 16 states. [2019-12-18 11:42:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:17,589 INFO L93 Difference]: Finished difference Result 225 states and 518 transitions. [2019-12-18 11:42:17,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:17,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:17,591 INFO L225 Difference]: With dead ends: 225 [2019-12-18 11:42:17,591 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:42:17,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:42:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2019-12-18 11:42:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-18 11:42:17,596 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-18 11:42:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:17,596 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-18 11:42:17,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-18 11:42:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:17,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:17,597 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,800 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-18 11:42:17,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300695674] [2019-12-18 11:42:17,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,868 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 11:42:17,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300695674] [2019-12-18 11:42:17,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207133868] [2019-12-18 11:42:17,868 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,910 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:42:17,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:17,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:17,999 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 11:42:18,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:18,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:18,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539069271] [2019-12-18 11:42:18,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:18,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:18,001 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-18 11:42:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:18,352 INFO L93 Difference]: Finished difference Result 222 states and 505 transitions. [2019-12-18 11:42:18,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:18,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:18,354 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:42:18,354 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:42:18,355 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 11:42:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:42:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 152. [2019-12-18 11:42:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-18 11:42:18,358 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-18 11:42:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:18,359 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-18 11:42:18,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-18 11:42:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:18,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:18,359 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:18,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:18,560 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-18 11:42:18,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:18,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031714076] [2019-12-18 11:42:18,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:18,624 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 11:42:18,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031714076] [2019-12-18 11:42:18,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502188675] [2019-12-18 11:42:18,625 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:18,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:18,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:18,748 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 11:42:18,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:18,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:18,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582697010] [2019-12-18 11:42:18,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:18,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:18,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:18,750 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-18 11:42:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:19,048 INFO L93 Difference]: Finished difference Result 188 states and 426 transitions. [2019-12-18 11:42:19,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:19,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:19,050 INFO L225 Difference]: With dead ends: 188 [2019-12-18 11:42:19,050 INFO L226 Difference]: Without dead ends: 187 [2019-12-18 11:42:19,051 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 11:42:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-18 11:42:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2019-12-18 11:42:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-18 11:42:19,054 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-18 11:42:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:19,055 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-18 11:42:19,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-18 11:42:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:19,055 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:19,056 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:19,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,259 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-18 11:42:19,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:19,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370934407] [2019-12-18 11:42:19,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:19,342 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 11:42:19,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370934407] [2019-12-18 11:42:19,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764910184] [2019-12-18 11:42:19,343 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:19,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:19,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:19,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:19,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:20,302 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 11:42:20,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:20,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:20,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508384387] [2019-12-18 11:42:20,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:20,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:20,304 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-18 11:42:21,514 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 11:42:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:21,545 INFO L93 Difference]: Finished difference Result 204 states and 457 transitions. [2019-12-18 11:42:21,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:21,545 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:21,546 INFO L225 Difference]: With dead ends: 204 [2019-12-18 11:42:21,546 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 11:42:21,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=228, Invalid=472, Unknown=2, NotChecked=0, Total=702 [2019-12-18 11:42:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 11:42:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2019-12-18 11:42:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 11:42:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 369 transitions. [2019-12-18 11:42:21,550 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 369 transitions. Word has length 13 [2019-12-18 11:42:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:21,550 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 369 transitions. [2019-12-18 11:42:21,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 369 transitions. [2019-12-18 11:42:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:21,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:21,551 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:21,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:21,752 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-18 11:42:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:21,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290971874] [2019-12-18 11:42:21,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:21,818 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 11:42:21,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290971874] [2019-12-18 11:42:21,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90509280] [2019-12-18 11:42:21,819 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 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 11:42:21,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:21,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:21,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:42:21,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:21,945 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 11:42:21,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:21,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:21,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281220281] [2019-12-18 11:42:21,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:21,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:21,946 INFO L87 Difference]: Start difference. First operand 153 states and 369 transitions. Second operand 16 states. [2019-12-18 11:42:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:22,170 INFO L93 Difference]: Finished difference Result 203 states and 459 transitions. [2019-12-18 11:42:22,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:22,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:22,172 INFO L225 Difference]: With dead ends: 203 [2019-12-18 11:42:22,172 INFO L226 Difference]: Without dead ends: 202 [2019-12-18 11:42:22,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:42:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-18 11:42:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2019-12-18 11:42:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-18 11:42:22,176 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-18 11:42:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:22,176 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-18 11:42:22,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-18 11:42:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:22,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:22,177 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:22,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,377 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-18 11:42:22,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:22,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862787107] [2019-12-18 11:42:22,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,452 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 11:42:22,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862787107] [2019-12-18 11:42:22,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370878283] [2019-12-18 11:42:22,453 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,495 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:22,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:22,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:22,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:22,984 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 11:42:22,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:22,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577057909] [2019-12-18 11:42:22,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:22,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:22,985 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-18 11:42:23,512 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 11:42:23,788 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:24,116 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:24,228 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-18 11:42:24,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:24,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:24,231 INFO L225 Difference]: With dead ends: 214 [2019-12-18 11:42:24,231 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 11:42:24,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=505, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:42:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 11:42:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 154. [2019-12-18 11:42:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-18 11:42:24,235 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-18 11:42:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:24,235 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-18 11:42:24,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-18 11:42:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:24,236 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:24,236 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:24,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:24,438 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-18 11:42:24,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:24,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199281657] [2019-12-18 11:42:24,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:24,510 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 11:42:24,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199281657] [2019-12-18 11:42:24,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344299582] [2019-12-18 11:42:24,511 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:24,571 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:24,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:24,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:24,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:25,531 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 11:42:25,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:25,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:25,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166328856] [2019-12-18 11:42:25,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:25,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=170, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:42:25,533 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-18 11:42:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:26,901 INFO L93 Difference]: Finished difference Result 231 states and 518 transitions. [2019-12-18 11:42:26,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:26,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:26,903 INFO L225 Difference]: With dead ends: 231 [2019-12-18 11:42:26,903 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 11:42:26,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=226, Invalid=473, Unknown=3, NotChecked=0, Total=702 [2019-12-18 11:42:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 11:42:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 154. [2019-12-18 11:42:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-18 11:42:26,908 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-18 11:42:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:26,908 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-18 11:42:26,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-18 11:42:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:26,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:26,908 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:27,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:27,110 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-18 11:42:27,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:27,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953515301] [2019-12-18 11:42:27,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:27,184 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 11:42:27,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953515301] [2019-12-18 11:42:27,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935057096] [2019-12-18 11:42:27,184 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:27,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:27,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:27,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:27,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:27,693 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 11:42:27,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:27,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:27,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738589023] [2019-12-18 11:42:27,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:27,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:27,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:27,694 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-18 11:42:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:28,156 INFO L93 Difference]: Finished difference Result 218 states and 495 transitions. [2019-12-18 11:42:28,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:28,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:28,158 INFO L225 Difference]: With dead ends: 218 [2019-12-18 11:42:28,158 INFO L226 Difference]: Without dead ends: 217 [2019-12-18 11:42:28,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=540, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:42:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-18 11:42:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2019-12-18 11:42:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 11:42:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-18 11:42:28,162 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-18 11:42:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:28,162 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-18 11:42:28,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-18 11:42:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:28,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:28,163 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:28,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:28,364 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-18 11:42:28,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:28,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284297138] [2019-12-18 11:42:28,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:28,428 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 11:42:28,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284297138] [2019-12-18 11:42:28,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452450675] [2019-12-18 11:42:28,429 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:28,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:28,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:28,620 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 11:42:28,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:28,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:28,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967945530] [2019-12-18 11:42:28,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:28,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:28,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:28,623 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-18 11:42:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:29,461 INFO L93 Difference]: Finished difference Result 202 states and 455 transitions. [2019-12-18 11:42:29,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:29,462 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:29,464 INFO L225 Difference]: With dead ends: 202 [2019-12-18 11:42:29,464 INFO L226 Difference]: Without dead ends: 201 [2019-12-18 11:42:29,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-18 11:42:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2019-12-18 11:42:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-18 11:42:29,470 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-18 11:42:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:29,471 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-18 11:42:29,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-18 11:42:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:29,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:29,472 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:29,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:29,676 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-18 11:42:29,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:29,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321774184] [2019-12-18 11:42:29,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:29,792 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 11:42:29,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321774184] [2019-12-18 11:42:29,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233573799] [2019-12-18 11:42:29,793 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 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 11:42:29,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:29,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:29,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:29,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:32,040 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 11:42:32,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:32,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:32,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689237940] [2019-12-18 11:42:32,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:32,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:32,041 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-18 11:42:32,581 WARN L192 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:42:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:35,190 INFO L93 Difference]: Finished difference Result 223 states and 500 transitions. [2019-12-18 11:42:35,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:35,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:35,192 INFO L225 Difference]: With dead ends: 223 [2019-12-18 11:42:35,192 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:42:35,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:42:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2019-12-18 11:42:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 11:42:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-18 11:42:35,196 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-18 11:42:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:35,197 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-18 11:42:35,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-18 11:42:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:35,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:35,197 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:35,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,398 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-18 11:42:35,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:35,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723434320] [2019-12-18 11:42:35,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,472 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 11:42:35,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723434320] [2019-12-18 11:42:35,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404238636] [2019-12-18 11:42:35,472 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:35,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:35,517 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:35,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:35,649 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 11:42:35,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:35,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:35,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623520717] [2019-12-18 11:42:35,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:35,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:35,651 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-18 11:42:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:36,183 INFO L93 Difference]: Finished difference Result 246 states and 552 transitions. [2019-12-18 11:42:36,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:36,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:36,186 INFO L225 Difference]: With dead ends: 246 [2019-12-18 11:42:36,186 INFO L226 Difference]: Without dead ends: 244 [2019-12-18 11:42:36,186 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 11:42:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-18 11:42:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 157. [2019-12-18 11:42:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 11:42:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 385 transitions. [2019-12-18 11:42:36,189 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 385 transitions. Word has length 13 [2019-12-18 11:42:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:36,190 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 385 transitions. [2019-12-18 11:42:36,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 385 transitions. [2019-12-18 11:42:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:36,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:36,190 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:36,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,394 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-18 11:42:36,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:36,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860203485] [2019-12-18 11:42:36,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:36,466 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 11:42:36,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860203485] [2019-12-18 11:42:36,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190936103] [2019-12-18 11:42:36,467 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:36,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:36,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:36,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:36,654 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 11:42:36,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:36,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:36,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043933767] [2019-12-18 11:42:36,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:36,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:36,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:36,656 INFO L87 Difference]: Start difference. First operand 157 states and 385 transitions. Second operand 16 states. [2019-12-18 11:42:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:37,273 INFO L93 Difference]: Finished difference Result 232 states and 525 transitions. [2019-12-18 11:42:37,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:37,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:37,275 INFO L225 Difference]: With dead ends: 232 [2019-12-18 11:42:37,276 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:42:37,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:42:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 155. [2019-12-18 11:42:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 11:42:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-18 11:42:37,279 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-18 11:42:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:37,280 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-18 11:42:37,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-18 11:42:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:37,280 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:37,280 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:37,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:37,482 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-18 11:42:37,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:37,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316485993] [2019-12-18 11:42:37,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:37,584 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 11:42:37,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316485993] [2019-12-18 11:42:37,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896531818] [2019-12-18 11:42:37,585 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:37,630 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:37,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:37,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:37,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:37,754 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 11:42:37,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:37,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:37,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168098348] [2019-12-18 11:42:37,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:37,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:37,756 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-18 11:42:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:38,266 INFO L93 Difference]: Finished difference Result 242 states and 541 transitions. [2019-12-18 11:42:38,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:38,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:38,268 INFO L225 Difference]: With dead ends: 242 [2019-12-18 11:42:38,268 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 11:42:38,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 11:42:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 156. [2019-12-18 11:42:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2019-12-18 11:42:38,272 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 13 [2019-12-18 11:42:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:38,272 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2019-12-18 11:42:38,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2019-12-18 11:42:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:38,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:38,273 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:38,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:38,474 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-18 11:42:38,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:38,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962302821] [2019-12-18 11:42:38,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:38,540 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 11:42:38,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962302821] [2019-12-18 11:42:38,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353631320] [2019-12-18 11:42:38,541 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:38,584 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:38,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:38,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:38,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:38,660 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 11:42:38,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:38,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:38,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115236991] [2019-12-18 11:42:38,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:38,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:38,662 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 16 states. [2019-12-18 11:42:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:39,082 INFO L93 Difference]: Finished difference Result 199 states and 461 transitions. [2019-12-18 11:42:39,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:39,083 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:39,085 INFO L225 Difference]: With dead ends: 199 [2019-12-18 11:42:39,085 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:42:39,085 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 11:42:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:42:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2019-12-18 11:42:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 11:42:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-18 11:42:39,091 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-18 11:42:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:39,091 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-18 11:42:39,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-18 11:42:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:39,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:39,092 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:39,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:39,293 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-18 11:42:39,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:39,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965412731] [2019-12-18 11:42:39,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:39,370 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 11:42:39,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965412731] [2019-12-18 11:42:39,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050554018] [2019-12-18 11:42:39,371 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:39,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:39,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:39,500 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 11:42:39,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:39,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:39,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552901677] [2019-12-18 11:42:39,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:39,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:39,502 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-18 11:42:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:39,923 INFO L93 Difference]: Finished difference Result 234 states and 538 transitions. [2019-12-18 11:42:39,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:39,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:39,926 INFO L225 Difference]: With dead ends: 234 [2019-12-18 11:42:39,926 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 11:42:39,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 11:42:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 158. [2019-12-18 11:42:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:42:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-18 11:42:39,931 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-18 11:42:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:39,931 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-18 11:42:39,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-18 11:42:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:39,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:39,932 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:40,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:40,133 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-18 11:42:40,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:40,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221315296] [2019-12-18 11:42:40,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:40,232 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 11:42:40,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221315296] [2019-12-18 11:42:40,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663060624] [2019-12-18 11:42:40,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:40,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:40,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:40,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:40,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:40,796 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 11:42:40,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:40,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:40,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758443332] [2019-12-18 11:42:40,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:40,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:40,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:40,798 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-18 11:42:41,418 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:42:41,952 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 11:42:42,165 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-18 11:42:43,111 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:42:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:43,166 INFO L93 Difference]: Finished difference Result 238 states and 542 transitions. [2019-12-18 11:42:43,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:43,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:43,169 INFO L225 Difference]: With dead ends: 238 [2019-12-18 11:42:43,169 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:42:43,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=264, Invalid=547, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:42:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:42:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-18 11:42:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 11:42:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-18 11:42:43,173 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-18 11:42:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:43,173 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-18 11:42:43,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-18 11:42:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:43,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:43,174 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:43,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:43,375 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-18 11:42:43,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:43,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251106710] [2019-12-18 11:42:43,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:43,456 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 11:42:43,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251106710] [2019-12-18 11:42:43,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619931828] [2019-12-18 11:42:43,457 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:43,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:42:43,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:43,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:43,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:43,589 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 11:42:43,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:43,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:43,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212232984] [2019-12-18 11:42:43,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:43,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:43,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:43,591 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-18 11:42:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:44,034 INFO L93 Difference]: Finished difference Result 245 states and 559 transitions. [2019-12-18 11:42:44,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:44,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:44,037 INFO L225 Difference]: With dead ends: 245 [2019-12-18 11:42:44,038 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:42:44,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:42:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 158. [2019-12-18 11:42:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:42:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-18 11:42:44,042 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-18 11:42:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:44,043 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-18 11:42:44,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-18 11:42:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:44,043 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:44,043 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:44,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:44,247 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-18 11:42:44,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:44,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042948386] [2019-12-18 11:42:44,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:44,319 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 11:42:44,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042948386] [2019-12-18 11:42:44,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901729659] [2019-12-18 11:42:44,320 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:44,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:44,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:44,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:44,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:44,450 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 11:42:44,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:44,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:44,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898173163] [2019-12-18 11:42:44,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:44,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:44,451 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-18 11:42:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:44,844 INFO L93 Difference]: Finished difference Result 245 states and 557 transitions. [2019-12-18 11:42:44,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:44,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:44,846 INFO L225 Difference]: With dead ends: 245 [2019-12-18 11:42:44,846 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 11:42:44,847 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 11:42:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 11:42:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 159. [2019-12-18 11:42:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 11:42:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-18 11:42:44,852 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-18 11:42:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:44,852 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-18 11:42:44,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-18 11:42:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:44,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:44,853 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:45,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:45,055 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:45,055 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-18 11:42:45,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:45,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048244884] [2019-12-18 11:42:45,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:45,129 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 11:42:45,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048244884] [2019-12-18 11:42:45,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349399079] [2019-12-18 11:42:45,130 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:45,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:45,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:45,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:45,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:45,282 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 11:42:45,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:45,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:45,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944979615] [2019-12-18 11:42:45,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:45,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:45,284 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-18 11:42:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:45,607 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2019-12-18 11:42:45,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:45,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:45,609 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:42:45,609 INFO L226 Difference]: Without dead ends: 234 [2019-12-18 11:42:45,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-18 11:42:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 160. [2019-12-18 11:42:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 11:42:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 397 transitions. [2019-12-18 11:42:45,614 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 397 transitions. Word has length 13 [2019-12-18 11:42:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:45,614 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 397 transitions. [2019-12-18 11:42:45,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 397 transitions. [2019-12-18 11:42:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:45,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:45,615 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:45,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:45,818 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-18 11:42:45,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:45,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077734440] [2019-12-18 11:42:45,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:45,893 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 11:42:45,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077734440] [2019-12-18 11:42:45,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260550266] [2019-12-18 11:42:45,894 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:45,938 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:45,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:45,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:45,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:46,031 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 11:42:46,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:46,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:46,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315544389] [2019-12-18 11:42:46,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:46,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:46,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:46,033 INFO L87 Difference]: Start difference. First operand 160 states and 397 transitions. Second operand 16 states. [2019-12-18 11:42:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:46,464 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2019-12-18 11:42:46,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:46,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:46,466 INFO L225 Difference]: With dead ends: 239 [2019-12-18 11:42:46,466 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:42:46,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:42:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-18 11:42:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-18 11:42:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-18 11:42:46,470 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-18 11:42:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:46,470 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-18 11:42:46,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-18 11:42:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:46,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:46,471 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:46,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:46,672 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-18 11:42:46,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:46,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994087105] [2019-12-18 11:42:46,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:46,745 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 11:42:46,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994087105] [2019-12-18 11:42:46,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588851627] [2019-12-18 11:42:46,745 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:46,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:46,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:47,596 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 11:42:47,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:47,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:47,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616922693] [2019-12-18 11:42:47,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:47,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:47,597 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-18 11:42:48,296 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:42:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:48,952 INFO L93 Difference]: Finished difference Result 240 states and 547 transitions. [2019-12-18 11:42:48,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:48,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:48,954 INFO L225 Difference]: With dead ends: 240 [2019-12-18 11:42:48,954 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 11:42:48,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=536, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:42:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 11:42:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 158. [2019-12-18 11:42:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 11:42:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-18 11:42:48,959 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-18 11:42:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:48,959 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-18 11:42:48,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-18 11:42:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:48,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:48,960 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:49,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,163 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-18 11:42:49,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:49,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627764844] [2019-12-18 11:42:49,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:49,241 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 11:42:49,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627764844] [2019-12-18 11:42:49,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821657868] [2019-12-18 11:42:49,241 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:49,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:49,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:49,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:49,873 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_280 Int)) (and (<= c_~j~0 (+ v_~j~0_280 c_~i~0)) (<= c_~i~0 (+ v_~j~0_280 2)) (<= (div (+ (* v_~j~0_280 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-18 11:42:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-18 11:42:49,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:49,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:49,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375827635] [2019-12-18 11:42:49,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:49,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=147, Unknown=1, NotChecked=26, Total=240 [2019-12-18 11:42:49,898 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-18 11:42:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:52,318 INFO L93 Difference]: Finished difference Result 241 states and 542 transitions. [2019-12-18 11:42:52,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:52,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:52,319 INFO L225 Difference]: With dead ends: 241 [2019-12-18 11:42:52,320 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 11:42:52,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=281, Invalid=532, Unknown=3, NotChecked=54, Total=870 [2019-12-18 11:42:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 11:42:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 156. [2019-12-18 11:42:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2019-12-18 11:42:52,325 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 13 [2019-12-18 11:42:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:52,325 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2019-12-18 11:42:52,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2019-12-18 11:42:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:52,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:52,326 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:52,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:52,529 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-18 11:42:52,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:52,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541607851] [2019-12-18 11:42:52,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:52,605 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 11:42:52,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541607851] [2019-12-18 11:42:52,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081261957] [2019-12-18 11:42:52,606 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:52,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:52,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:52,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:52,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:52,748 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 11:42:52,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:52,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:52,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837127674] [2019-12-18 11:42:52,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:52,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:52,750 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 16 states. [2019-12-18 11:42:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:53,044 INFO L93 Difference]: Finished difference Result 179 states and 409 transitions. [2019-12-18 11:42:53,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:53,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:53,046 INFO L225 Difference]: With dead ends: 179 [2019-12-18 11:42:53,046 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 11:42:53,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 11:42:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 156. [2019-12-18 11:42:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 11:42:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 369 transitions. [2019-12-18 11:42:53,050 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 369 transitions. Word has length 13 [2019-12-18 11:42:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:53,050 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 369 transitions. [2019-12-18 11:42:53,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 369 transitions. [2019-12-18 11:42:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:53,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:53,051 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:53,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:53,252 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-18 11:42:53,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:53,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302214027] [2019-12-18 11:42:53,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:53,354 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 11:42:53,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302214027] [2019-12-18 11:42:53,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684463909] [2019-12-18 11:42:53,355 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:53,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:42:53,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:53,464 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 11:42:53,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:42:53,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-18 11:42:53,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127644531] [2019-12-18 11:42:53,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:42:53,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:53,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:42:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:42:53,466 INFO L87 Difference]: Start difference. First operand 156 states and 369 transitions. Second operand 9 states. [2019-12-18 11:42:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:53,494 INFO L93 Difference]: Finished difference Result 206 states and 491 transitions. [2019-12-18 11:42:53,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:42:53,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-18 11:42:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:53,495 INFO L225 Difference]: With dead ends: 206 [2019-12-18 11:42:53,495 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:42:53,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:42:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:42:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2019-12-18 11:42:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-18 11:42:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 476 transitions. [2019-12-18 11:42:53,499 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 476 transitions. Word has length 13 [2019-12-18 11:42:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:53,500 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 476 transitions. [2019-12-18 11:42:53,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:42:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 476 transitions. [2019-12-18 11:42:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:53,500 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:53,501 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:53,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:53,704 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 94 times [2019-12-18 11:42:53,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:53,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539377702] [2019-12-18 11:42:53,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:53,785 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 11:42:53,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539377702] [2019-12-18 11:42:53,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98622320] [2019-12-18 11:42:53,786 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 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 11:42:53,830 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:53,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:53,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:53,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:53,951 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 11:42:53,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:53,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:53,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310508846] [2019-12-18 11:42:53,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:53,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:53,953 INFO L87 Difference]: Start difference. First operand 198 states and 476 transitions. Second operand 18 states. [2019-12-18 11:42:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:54,165 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2019-12-18 11:42:54,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:54,165 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:54,166 INFO L225 Difference]: With dead ends: 215 [2019-12-18 11:42:54,167 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 11:42:54,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 11:42:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2019-12-18 11:42:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-18 11:42:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 474 transitions. [2019-12-18 11:42:54,171 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 474 transitions. Word has length 14 [2019-12-18 11:42:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:54,172 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 474 transitions. [2019-12-18 11:42:54,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 474 transitions. [2019-12-18 11:42:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:54,172 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:54,173 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:54,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:54,376 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 95 times [2019-12-18 11:42:54,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:54,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145597447] [2019-12-18 11:42:54,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:54,451 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 11:42:54,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145597447] [2019-12-18 11:42:54,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844822336] [2019-12-18 11:42:54,452 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 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 11:42:54,497 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:54,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:54,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:54,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:54,615 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 11:42:54,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:54,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:54,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49499032] [2019-12-18 11:42:54,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:54,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:54,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:54,617 INFO L87 Difference]: Start difference. First operand 196 states and 474 transitions. Second operand 18 states. [2019-12-18 11:42:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:54,851 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2019-12-18 11:42:54,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:54,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:54,852 INFO L225 Difference]: With dead ends: 227 [2019-12-18 11:42:54,852 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 11:42:54,853 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 11:42:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 11:42:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 198. [2019-12-18 11:42:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-18 11:42:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 482 transitions. [2019-12-18 11:42:54,856 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 482 transitions. Word has length 14 [2019-12-18 11:42:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:54,856 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 482 transitions. [2019-12-18 11:42:54,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 482 transitions. [2019-12-18 11:42:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:54,857 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:54,857 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:55,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:55,058 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 96 times [2019-12-18 11:42:55,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:55,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362705477] [2019-12-18 11:42:55,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:55,157 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 11:42:55,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362705477] [2019-12-18 11:42:55,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579861753] [2019-12-18 11:42:55,157 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 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 11:42:55,222 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:42:55,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:55,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 11:42:55,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:55,380 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 11:42:55,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:55,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:55,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087020356] [2019-12-18 11:42:55,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:55,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:55,382 INFO L87 Difference]: Start difference. First operand 198 states and 482 transitions. Second operand 18 states. [2019-12-18 11:42:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:55,645 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2019-12-18 11:42:55,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:42:55,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:55,646 INFO L225 Difference]: With dead ends: 225 [2019-12-18 11:42:55,646 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:42:55,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:42:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2019-12-18 11:42:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-18 11:42:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 481 transitions. [2019-12-18 11:42:55,650 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 481 transitions. Word has length 14 [2019-12-18 11:42:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:55,651 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 481 transitions. [2019-12-18 11:42:55,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 481 transitions. [2019-12-18 11:42:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:55,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:55,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:55,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:55,855 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:55,855 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 97 times [2019-12-18 11:42:55,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:55,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201694923] [2019-12-18 11:42:55,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:55,935 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 11:42:55,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201694923] [2019-12-18 11:42:55,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982164927] [2019-12-18 11:42:55,936 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 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 11:42:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:55,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:55,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:56,113 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 11:42:56,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:56,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:56,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241363475] [2019-12-18 11:42:56,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:56,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:56,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:56,115 INFO L87 Difference]: Start difference. First operand 198 states and 481 transitions. Second operand 18 states. [2019-12-18 11:42:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:56,329 INFO L93 Difference]: Finished difference Result 235 states and 552 transitions. [2019-12-18 11:42:56,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:56,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:56,331 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:42:56,331 INFO L226 Difference]: Without dead ends: 234 [2019-12-18 11:42:56,331 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 11:42:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-18 11:42:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2019-12-18 11:42:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-18 11:42:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 489 transitions. [2019-12-18 11:42:56,335 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 489 transitions. Word has length 14 [2019-12-18 11:42:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:56,335 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 489 transitions. [2019-12-18 11:42:56,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 489 transitions. [2019-12-18 11:42:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:56,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:56,336 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:56,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:56,536 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 98 times [2019-12-18 11:42:56,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:56,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913820431] [2019-12-18 11:42:56,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:56,623 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 11:42:56,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913820431] [2019-12-18 11:42:56,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119054093] [2019-12-18 11:42:56,624 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 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 11:42:56,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:56,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:56,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:56,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:57,020 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 11:42:57,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:57,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:57,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025815005] [2019-12-18 11:42:57,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:57,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:57,022 INFO L87 Difference]: Start difference. First operand 200 states and 489 transitions. Second operand 18 states. [2019-12-18 11:42:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:57,319 INFO L93 Difference]: Finished difference Result 250 states and 583 transitions. [2019-12-18 11:42:57,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:42:57,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:57,320 INFO L225 Difference]: With dead ends: 250 [2019-12-18 11:42:57,320 INFO L226 Difference]: Without dead ends: 249 [2019-12-18 11:42:57,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-18 11:42:57,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 200. [2019-12-18 11:42:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-18 11:42:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 489 transitions. [2019-12-18 11:42:57,325 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 489 transitions. Word has length 14 [2019-12-18 11:42:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:57,325 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 489 transitions. [2019-12-18 11:42:57,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 489 transitions. [2019-12-18 11:42:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:57,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:57,326 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:57,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:57,529 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 99 times [2019-12-18 11:42:57,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:57,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666197881] [2019-12-18 11:42:57,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:57,634 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 11:42:57,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666197881] [2019-12-18 11:42:57,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778696089] [2019-12-18 11:42:57,635 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 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 11:42:57,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:57,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:57,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:57,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:57,850 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 11:42:57,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:57,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:57,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104024519] [2019-12-18 11:42:57,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:57,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:57,852 INFO L87 Difference]: Start difference. First operand 200 states and 489 transitions. Second operand 18 states. [2019-12-18 11:42:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:58,571 INFO L93 Difference]: Finished difference Result 260 states and 602 transitions. [2019-12-18 11:42:58,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:58,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:58,573 INFO L225 Difference]: With dead ends: 260 [2019-12-18 11:42:58,573 INFO L226 Difference]: Without dead ends: 259 [2019-12-18 11:42:58,574 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-18 11:42:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 199. [2019-12-18 11:42:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-18 11:42:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-18 11:42:58,578 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-18 11:42:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:58,578 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-18 11:42:58,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-18 11:42:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:58,579 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:58,579 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:58,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:58,782 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:58,783 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 100 times [2019-12-18 11:42:58,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:58,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863902160] [2019-12-18 11:42:58,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:58,860 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 11:42:58,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863902160] [2019-12-18 11:42:58,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610461269] [2019-12-18 11:42:58,860 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 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 11:42:58,911 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:58,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:58,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:58,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:59,017 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 11:42:59,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:59,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:59,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649711975] [2019-12-18 11:42:59,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:59,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:59,019 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 18 states. [2019-12-18 11:42:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:59,237 INFO L93 Difference]: Finished difference Result 238 states and 562 transitions. [2019-12-18 11:42:59,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:59,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:59,239 INFO L225 Difference]: With dead ends: 238 [2019-12-18 11:42:59,239 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 11:42:59,239 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 11:42:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 11:42:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 203. [2019-12-18 11:42:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-18 11:42:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-18 11:42:59,244 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-18 11:42:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:59,244 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-18 11:42:59,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-18 11:42:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:59,244 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:59,244 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:59,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:59,445 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:59,446 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 101 times [2019-12-18 11:42:59,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:59,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114630093] [2019-12-18 11:42:59,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:59,540 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 11:42:59,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114630093] [2019-12-18 11:42:59,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113488358] [2019-12-18 11:42:59,541 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 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 11:42:59,588 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:59,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:59,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:59,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:01,306 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:01,308 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 11:43:01,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:01,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:01,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129297189] [2019-12-18 11:43:01,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:01,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:01,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:01,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=207, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:01,309 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-18 11:43:01,894 WARN L192 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:43:02,504 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:43:02,813 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-18 11:43:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:02,898 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-18 11:43:02,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:02,899 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:02,900 INFO L225 Difference]: With dead ends: 275 [2019-12-18 11:43:02,900 INFO L226 Difference]: Without dead ends: 274 [2019-12-18 11:43:02,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=273, Invalid=482, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-18 11:43:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 203. [2019-12-18 11:43:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-18 11:43:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-18 11:43:02,904 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-18 11:43:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:02,904 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-18 11:43:02,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-18 11:43:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:02,905 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:02,905 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:03,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:03,106 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 102 times [2019-12-18 11:43:03,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:03,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187912724] [2019-12-18 11:43:03,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:03,183 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 11:43:03,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187912724] [2019-12-18 11:43:03,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267471665] [2019-12-18 11:43:03,184 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 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 11:43:03,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:03,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:03,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:03,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:03,751 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_327 Int)) (and (<= c_~i~0 (+ (* 2 v_~j~0_327) 1)) (<= c_~j~0 (+ v_~j~0_327 c_~i~0)) (<= (div (+ (* v_~j~0_327 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 11:43:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-18 11:43:03,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:03,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:03,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785277328] [2019-12-18 11:43:03,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:03,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:03,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:03,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=184, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:43:03,773 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-18 11:43:04,519 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-18 11:43:05,150 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-18 11:43:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:05,260 INFO L93 Difference]: Finished difference Result 300 states and 673 transitions. [2019-12-18 11:43:05,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:05,260 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:05,261 INFO L225 Difference]: With dead ends: 300 [2019-12-18 11:43:05,261 INFO L226 Difference]: Without dead ends: 298 [2019-12-18 11:43:05,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=261, Invalid=498, Unknown=1, NotChecked=52, Total=812 [2019-12-18 11:43:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-18 11:43:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2019-12-18 11:43:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-18 11:43:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-18 11:43:05,267 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-18 11:43:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:05,267 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-18 11:43:05,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-18 11:43:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:05,267 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:05,267 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:05,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:05,468 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:05,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:05,469 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 103 times [2019-12-18 11:43:05,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:05,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604722029] [2019-12-18 11:43:05,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:05,553 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 11:43:05,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604722029] [2019-12-18 11:43:05,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676322587] [2019-12-18 11:43:05,554 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 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 11:43:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:05,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:05,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:07,185 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 11:43:07,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:07,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:07,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221629569] [2019-12-18 11:43:07,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:07,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:07,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:07,187 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 18 states. [2019-12-18 11:43:08,219 WARN L192 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 11:43:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:09,215 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-18 11:43:09,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:09,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:09,217 INFO L225 Difference]: With dead ends: 275 [2019-12-18 11:43:09,217 INFO L226 Difference]: Without dead ends: 269 [2019-12-18 11:43:09,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=321, Invalid=547, Unknown=2, NotChecked=0, Total=870 [2019-12-18 11:43:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-18 11:43:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2019-12-18 11:43:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-18 11:43:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-18 11:43:09,221 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-18 11:43:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:09,221 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-18 11:43:09,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-18 11:43:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:09,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:09,222 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:09,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:09,423 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 104 times [2019-12-18 11:43:09,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:09,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531806941] [2019-12-18 11:43:09,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:09,522 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 11:43:09,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531806941] [2019-12-18 11:43:09,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661377807] [2019-12-18 11:43:09,523 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 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 11:43:09,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:09,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:09,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:09,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:10,289 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_336 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~j~0_336 1)) (<= (div (+ (* v_~j~0_336 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_336) 1)))) is different from true [2019-12-18 11:43:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-18 11:43:10,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:10,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:10,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020036522] [2019-12-18 11:43:10,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:10,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:10,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:10,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=179, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:43:10,320 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-18 11:43:10,846 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-18 11:43:11,627 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-18 11:43:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:13,874 INFO L93 Difference]: Finished difference Result 300 states and 680 transitions. [2019-12-18 11:43:13,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:13,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:13,876 INFO L225 Difference]: With dead ends: 300 [2019-12-18 11:43:13,876 INFO L226 Difference]: Without dead ends: 298 [2019-12-18 11:43:13,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=4, NotChecked=54, Total=870 [2019-12-18 11:43:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-18 11:43:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 206. [2019-12-18 11:43:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-18 11:43:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 511 transitions. [2019-12-18 11:43:13,880 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 511 transitions. Word has length 14 [2019-12-18 11:43:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:13,880 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 511 transitions. [2019-12-18 11:43:13,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 511 transitions. [2019-12-18 11:43:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:13,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:13,881 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:14,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:14,082 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 105 times [2019-12-18 11:43:14,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:14,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126959831] [2019-12-18 11:43:14,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:14,165 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 11:43:14,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126959831] [2019-12-18 11:43:14,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029181472] [2019-12-18 11:43:14,165 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 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 11:43:14,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:14,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:14,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:14,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:14,879 WARN L192 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:43:16,437 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:43:16,438 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 11:43:16,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:16,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:16,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620118239] [2019-12-18 11:43:16,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:16,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:16,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:16,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:16,440 INFO L87 Difference]: Start difference. First operand 206 states and 511 transitions. Second operand 18 states. [2019-12-18 11:43:17,678 WARN L192 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:43:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:17,799 INFO L93 Difference]: Finished difference Result 302 states and 701 transitions. [2019-12-18 11:43:17,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:43:17,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:17,801 INFO L225 Difference]: With dead ends: 302 [2019-12-18 11:43:17,801 INFO L226 Difference]: Without dead ends: 301 [2019-12-18 11:43:17,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=278, Invalid=477, Unknown=1, NotChecked=0, Total=756 [2019-12-18 11:43:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-18 11:43:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2019-12-18 11:43:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-18 11:43:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-18 11:43:17,805 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-18 11:43:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:17,805 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-18 11:43:17,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-18 11:43:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:17,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:17,806 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:18,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:18,007 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 106 times [2019-12-18 11:43:18,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:18,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344501148] [2019-12-18 11:43:18,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:18,095 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 11:43:18,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344501148] [2019-12-18 11:43:18,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668363382] [2019-12-18 11:43:18,095 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 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 11:43:18,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:18,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:18,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:18,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:20,037 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 11:43:20,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:20,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:20,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516078329] [2019-12-18 11:43:20,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:20,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:20,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=200, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:20,039 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-18 11:43:21,537 WARN L192 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:43:22,054 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 11:43:23,332 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 11:43:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:23,394 INFO L93 Difference]: Finished difference Result 266 states and 623 transitions. [2019-12-18 11:43:23,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:43:23,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:23,396 INFO L225 Difference]: With dead ends: 266 [2019-12-18 11:43:23,397 INFO L226 Difference]: Without dead ends: 265 [2019-12-18 11:43:23,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=273, Invalid=480, Unknown=3, NotChecked=0, Total=756 [2019-12-18 11:43:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-18 11:43:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2019-12-18 11:43:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-18 11:43:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 501 transitions. [2019-12-18 11:43:23,401 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 501 transitions. Word has length 14 [2019-12-18 11:43:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:23,401 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 501 transitions. [2019-12-18 11:43:23,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 501 transitions. [2019-12-18 11:43:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:23,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:23,402 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:23,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:23,605 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 107 times [2019-12-18 11:43:23,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:23,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861969049] [2019-12-18 11:43:23,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:23,696 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 11:43:23,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861969049] [2019-12-18 11:43:23,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272961323] [2019-12-18 11:43:23,696 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 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 11:43:23,736 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:23,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:23,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:23,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:23,853 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 11:43:23,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:23,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:23,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525797122] [2019-12-18 11:43:23,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:23,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:23,855 INFO L87 Difference]: Start difference. First operand 203 states and 501 transitions. Second operand 18 states. [2019-12-18 11:43:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:24,064 INFO L93 Difference]: Finished difference Result 236 states and 565 transitions. [2019-12-18 11:43:24,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:43:24,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:24,066 INFO L225 Difference]: With dead ends: 236 [2019-12-18 11:43:24,066 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 11:43:24,066 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 11:43:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 11:43:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2019-12-18 11:43:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:43:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-18 11:43:24,070 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-18 11:43:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:24,070 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-18 11:43:24,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-18 11:43:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:24,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:24,071 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:24,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:24,272 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:24,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 108 times [2019-12-18 11:43:24,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:24,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015264700] [2019-12-18 11:43:24,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:24,370 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 11:43:24,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015264700] [2019-12-18 11:43:24,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708103991] [2019-12-18 11:43:24,371 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 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 11:43:24,417 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:43:24,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:24,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 11:43:24,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:24,511 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 11:43:24,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:24,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:24,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848981972] [2019-12-18 11:43:24,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:24,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:24,513 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-18 11:43:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:24,771 INFO L93 Difference]: Finished difference Result 282 states and 657 transitions. [2019-12-18 11:43:24,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:24,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:24,772 INFO L225 Difference]: With dead ends: 282 [2019-12-18 11:43:24,772 INFO L226 Difference]: Without dead ends: 281 [2019-12-18 11:43:24,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:43:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-18 11:43:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2019-12-18 11:43:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:43:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-18 11:43:24,778 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-18 11:43:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:24,778 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-18 11:43:24,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-18 11:43:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:24,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:24,779 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:24,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:24,982 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 109 times [2019-12-18 11:43:24,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:24,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138311536] [2019-12-18 11:43:24,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:25,105 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 11:43:25,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138311536] [2019-12-18 11:43:25,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351207125] [2019-12-18 11:43:25,106 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 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 11:43:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:25,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:25,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:25,287 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 11:43:25,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:25,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:25,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154401364] [2019-12-18 11:43:25,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:25,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:25,288 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-18 11:43:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:25,739 INFO L93 Difference]: Finished difference Result 310 states and 719 transitions. [2019-12-18 11:43:25,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:25,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:25,741 INFO L225 Difference]: With dead ends: 310 [2019-12-18 11:43:25,741 INFO L226 Difference]: Without dead ends: 309 [2019-12-18 11:43:25,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:43:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-18 11:43:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 209. [2019-12-18 11:43:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-18 11:43:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-18 11:43:25,747 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-18 11:43:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:25,747 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-18 11:43:25,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-18 11:43:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:25,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:25,748 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:25,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,951 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 110 times [2019-12-18 11:43:25,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:25,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759253224] [2019-12-18 11:43:25,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:26,107 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 11:43:26,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759253224] [2019-12-18 11:43:26,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174425886] [2019-12-18 11:43:26,107 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 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 11:43:26,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:26,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:26,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:26,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:26,371 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 11:43:26,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:26,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:26,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294830587] [2019-12-18 11:43:26,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:26,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:26,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:26,373 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 18 states. [2019-12-18 11:43:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:27,043 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-18 11:43:27,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:27,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:27,045 INFO L225 Difference]: With dead ends: 288 [2019-12-18 11:43:27,045 INFO L226 Difference]: Without dead ends: 287 [2019-12-18 11:43:27,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-18 11:43:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 208. [2019-12-18 11:43:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-18 11:43:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-18 11:43:27,049 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-18 11:43:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:27,050 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-18 11:43:27,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-18 11:43:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:27,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:27,050 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:27,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:27,254 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 111 times [2019-12-18 11:43:27,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:27,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123273713] [2019-12-18 11:43:27,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:27,382 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 11:43:27,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123273713] [2019-12-18 11:43:27,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815590062] [2019-12-18 11:43:27,383 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 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 11:43:27,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:27,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:27,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:43:27,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:27,646 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 11:43:27,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:27,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:27,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867148279] [2019-12-18 11:43:27,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:27,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:27,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:27,648 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-18 11:43:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:29,135 INFO L93 Difference]: Finished difference Result 336 states and 770 transitions. [2019-12-18 11:43:29,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:43:29,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:29,137 INFO L225 Difference]: With dead ends: 336 [2019-12-18 11:43:29,137 INFO L226 Difference]: Without dead ends: 326 [2019-12-18 11:43:29,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:43:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-12-18 11:43:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 218. [2019-12-18 11:43:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-18 11:43:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 552 transitions. [2019-12-18 11:43:29,143 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 552 transitions. Word has length 14 [2019-12-18 11:43:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:29,143 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 552 transitions. [2019-12-18 11:43:29,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 552 transitions. [2019-12-18 11:43:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:29,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:29,144 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:29,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:29,347 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 112 times [2019-12-18 11:43:29,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:29,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903631782] [2019-12-18 11:43:29,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:29,430 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 11:43:29,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903631782] [2019-12-18 11:43:29,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204595669] [2019-12-18 11:43:29,430 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 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 11:43:29,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:29,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:29,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:29,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:29,672 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 11:43:29,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:29,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:29,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475221375] [2019-12-18 11:43:29,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:29,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:29,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:29,674 INFO L87 Difference]: Start difference. First operand 218 states and 552 transitions. Second operand 18 states. [2019-12-18 11:43:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:30,215 INFO L93 Difference]: Finished difference Result 333 states and 775 transitions. [2019-12-18 11:43:30,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:43:30,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:30,217 INFO L225 Difference]: With dead ends: 333 [2019-12-18 11:43:30,217 INFO L226 Difference]: Without dead ends: 331 [2019-12-18 11:43:30,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:43:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-18 11:43:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 220. [2019-12-18 11:43:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 11:43:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 560 transitions. [2019-12-18 11:43:30,222 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 560 transitions. Word has length 14 [2019-12-18 11:43:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:30,223 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 560 transitions. [2019-12-18 11:43:30,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 560 transitions. [2019-12-18 11:43:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:30,223 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:30,224 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:30,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:30,427 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:30,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 113 times [2019-12-18 11:43:30,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:30,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34727875] [2019-12-18 11:43:30,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:30,518 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 11:43:30,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34727875] [2019-12-18 11:43:30,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924608503] [2019-12-18 11:43:30,519 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 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 11:43:30,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:43:30,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:30,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:30,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:30,791 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 11:43:30,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:30,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:30,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417344312] [2019-12-18 11:43:30,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:30,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:30,793 INFO L87 Difference]: Start difference. First operand 220 states and 560 transitions. Second operand 18 states. [2019-12-18 11:43:33,509 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-18 11:43:33,672 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 11:43:37,958 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:43:42,185 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:43:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:52,345 INFO L93 Difference]: Finished difference Result 330 states and 765 transitions. [2019-12-18 11:43:52,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:43:52,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:52,347 INFO L225 Difference]: With dead ends: 330 [2019-12-18 11:43:52,347 INFO L226 Difference]: Without dead ends: 328 [2019-12-18 11:43:52,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=338, Invalid=652, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:43:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-18 11:43:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 220. [2019-12-18 11:43:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 11:43:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 560 transitions. [2019-12-18 11:43:52,352 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 560 transitions. Word has length 14 [2019-12-18 11:43:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:52,353 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 560 transitions. [2019-12-18 11:43:52,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 560 transitions. [2019-12-18 11:43:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:52,353 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:52,353 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:52,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:52,554 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 114 times [2019-12-18 11:43:52,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:52,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884517471] [2019-12-18 11:43:52,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:52,671 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 11:43:52,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884517471] [2019-12-18 11:43:52,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915536904] [2019-12-18 11:43:52,671 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 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 11:43:52,713 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:43:52,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:52,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:52,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:52,875 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 11:43:52,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:52,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:52,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574620208] [2019-12-18 11:43:52,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:52,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:52,877 INFO L87 Difference]: Start difference. First operand 220 states and 560 transitions. Second operand 18 states. [2019-12-18 11:43:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:54,096 INFO L93 Difference]: Finished difference Result 287 states and 678 transitions. [2019-12-18 11:43:54,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:43:54,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:54,099 INFO L225 Difference]: With dead ends: 287 [2019-12-18 11:43:54,099 INFO L226 Difference]: Without dead ends: 286 [2019-12-18 11:43:54,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:43:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-18 11:43:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2019-12-18 11:43:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:43:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 568 transitions. [2019-12-18 11:43:54,103 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 568 transitions. Word has length 14 [2019-12-18 11:43:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:54,103 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 568 transitions. [2019-12-18 11:43:54,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 568 transitions. [2019-12-18 11:43:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:54,104 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:54,104 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:54,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:54,305 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 115 times [2019-12-18 11:43:54,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:54,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980537249] [2019-12-18 11:43:54,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:54,385 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 11:43:54,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980537249] [2019-12-18 11:43:54,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767810563] [2019-12-18 11:43:54,386 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 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 11:43:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:54,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:54,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:54,934 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 11:43:54,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:54,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:54,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744432872] [2019-12-18 11:43:54,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:54,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:54,936 INFO L87 Difference]: Start difference. First operand 222 states and 568 transitions. Second operand 18 states. [2019-12-18 11:43:58,762 WARN L192 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:44:00,831 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:44:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:02,970 INFO L93 Difference]: Finished difference Result 322 states and 757 transitions. [2019-12-18 11:44:02,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:02,970 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:02,972 INFO L225 Difference]: With dead ends: 322 [2019-12-18 11:44:02,972 INFO L226 Difference]: Without dead ends: 321 [2019-12-18 11:44:02,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-18 11:44:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 221. [2019-12-18 11:44:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:44:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 564 transitions. [2019-12-18 11:44:02,977 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 564 transitions. Word has length 14 [2019-12-18 11:44:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:02,977 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 564 transitions. [2019-12-18 11:44:02,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 564 transitions. [2019-12-18 11:44:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:02,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:02,977 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:03,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:03,178 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:03,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 116 times [2019-12-18 11:44:03,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:03,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745512223] [2019-12-18 11:44:03,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:03,296 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 11:44:03,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745512223] [2019-12-18 11:44:03,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546170369] [2019-12-18 11:44:03,297 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 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 11:44:03,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:03,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:03,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:03,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:03,523 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 11:44:03,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:03,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:03,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507323282] [2019-12-18 11:44:03,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:03,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:03,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:03,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:03,524 INFO L87 Difference]: Start difference. First operand 221 states and 564 transitions. Second operand 18 states. [2019-12-18 11:44:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:04,010 INFO L93 Difference]: Finished difference Result 329 states and 769 transitions. [2019-12-18 11:44:04,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:04,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:04,012 INFO L225 Difference]: With dead ends: 329 [2019-12-18 11:44:04,012 INFO L226 Difference]: Without dead ends: 328 [2019-12-18 11:44:04,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:44:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-18 11:44:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 222. [2019-12-18 11:44:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:44:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 568 transitions. [2019-12-18 11:44:04,017 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 568 transitions. Word has length 14 [2019-12-18 11:44:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:04,018 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 568 transitions. [2019-12-18 11:44:04,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 568 transitions. [2019-12-18 11:44:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:04,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:04,019 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:04,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:04,221 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 117 times [2019-12-18 11:44:04,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:04,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318007880] [2019-12-18 11:44:04,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:04,305 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 11:44:04,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318007880] [2019-12-18 11:44:04,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138097690] [2019-12-18 11:44:04,306 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 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 11:44:04,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:04,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:04,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:04,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:04,559 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 11:44:04,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:04,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:04,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978654539] [2019-12-18 11:44:04,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:04,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:04,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:04,560 INFO L87 Difference]: Start difference. First operand 222 states and 568 transitions. Second operand 18 states. [2019-12-18 11:44:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:05,916 INFO L93 Difference]: Finished difference Result 320 states and 748 transitions. [2019-12-18 11:44:05,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:05,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:05,917 INFO L225 Difference]: With dead ends: 320 [2019-12-18 11:44:05,917 INFO L226 Difference]: Without dead ends: 313 [2019-12-18 11:44:05,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=590, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-18 11:44:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 219. [2019-12-18 11:44:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-18 11:44:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 553 transitions. [2019-12-18 11:44:05,922 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 553 transitions. Word has length 14 [2019-12-18 11:44:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:05,922 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 553 transitions. [2019-12-18 11:44:05,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 553 transitions. [2019-12-18 11:44:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:05,923 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:05,923 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:06,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:06,124 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 118 times [2019-12-18 11:44:06,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:06,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256373497] [2019-12-18 11:44:06,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:06,203 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 11:44:06,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256373497] [2019-12-18 11:44:06,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563051927] [2019-12-18 11:44:06,203 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 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 11:44:06,245 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:06,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:06,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:06,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:06,422 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 11:44:06,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:06,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:06,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991748149] [2019-12-18 11:44:06,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:06,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:06,423 INFO L87 Difference]: Start difference. First operand 219 states and 553 transitions. Second operand 18 states. [2019-12-18 11:44:10,542 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2019-12-18 11:44:12,605 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:44:15,730 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 11:44:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:17,972 INFO L93 Difference]: Finished difference Result 290 states and 689 transitions. [2019-12-18 11:44:17,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:44:17,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:17,974 INFO L225 Difference]: With dead ends: 290 [2019-12-18 11:44:17,974 INFO L226 Difference]: Without dead ends: 289 [2019-12-18 11:44:17,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:44:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-12-18 11:44:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 216. [2019-12-18 11:44:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:17,978 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:17,978 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:17,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:17,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:17,978 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:18,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:18,179 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 119 times [2019-12-18 11:44:18,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:18,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634471530] [2019-12-18 11:44:18,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:18,262 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 11:44:18,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634471530] [2019-12-18 11:44:18,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817753868] [2019-12-18 11:44:18,262 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:44:18,307 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:18,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:18,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:18,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:18,418 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 11:44:18,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:18,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:18,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442831700] [2019-12-18 11:44:18,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:18,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:18,420 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:18,846 INFO L93 Difference]: Finished difference Result 268 states and 640 transitions. [2019-12-18 11:44:18,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:18,846 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:18,847 INFO L225 Difference]: With dead ends: 268 [2019-12-18 11:44:18,848 INFO L226 Difference]: Without dead ends: 267 [2019-12-18 11:44:18,848 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 11:44:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-18 11:44:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2019-12-18 11:44:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:18,852 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:18,852 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:18,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:18,852 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:18,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:18,852 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:19,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:19,056 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 120 times [2019-12-18 11:44:19,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:19,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203599313] [2019-12-18 11:44:19,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:19,148 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 11:44:19,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203599313] [2019-12-18 11:44:19,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991994216] [2019-12-18 11:44:19,149 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 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 11:44:19,194 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:44:19,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:19,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:19,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:19,574 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 11:44:19,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:19,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:19,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131520586] [2019-12-18 11:44:19,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:19,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:19,575 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:20,103 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2019-12-18 11:44:20,956 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:44:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:21,155 INFO L93 Difference]: Finished difference Result 284 states and 671 transitions. [2019-12-18 11:44:21,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:21,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:21,157 INFO L225 Difference]: With dead ends: 284 [2019-12-18 11:44:21,157 INFO L226 Difference]: Without dead ends: 283 [2019-12-18 11:44:21,158 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 11:44:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2019-12-18 11:44:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 216. [2019-12-18 11:44:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:21,163 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:21,163 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:21,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:21,164 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:21,164 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:21,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:21,367 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 121 times [2019-12-18 11:44:21,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:21,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164626846] [2019-12-18 11:44:21,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:21,454 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 11:44:21,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164626846] [2019-12-18 11:44:21,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230470301] [2019-12-18 11:44:21,454 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:44:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:21,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:21,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:21,621 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 11:44:21,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:21,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:21,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262885416] [2019-12-18 11:44:21,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:21,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:21,623 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:22,031 INFO L93 Difference]: Finished difference Result 282 states and 668 transitions. [2019-12-18 11:44:22,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:22,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:22,033 INFO L225 Difference]: With dead ends: 282 [2019-12-18 11:44:22,033 INFO L226 Difference]: Without dead ends: 281 [2019-12-18 11:44:22,033 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 11:44:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-18 11:44:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2019-12-18 11:44:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:22,038 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:22,038 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:22,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:22,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:22,038 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:22,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:22,239 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 122 times [2019-12-18 11:44:22,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:22,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382178876] [2019-12-18 11:44:22,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:22,325 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 11:44:22,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382178876] [2019-12-18 11:44:22,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914136934] [2019-12-18 11:44:22,325 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 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 11:44:22,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:22,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:22,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:22,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:24,260 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 11:44:24,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:24,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:24,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176680634] [2019-12-18 11:44:24,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:24,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:24,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:24,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=212, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:44:24,261 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:24,734 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-18 11:44:25,270 WARN L192 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2019-12-18 11:44:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:25,833 INFO L93 Difference]: Finished difference Result 331 states and 766 transitions. [2019-12-18 11:44:25,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:25,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:25,835 INFO L225 Difference]: With dead ends: 331 [2019-12-18 11:44:25,835 INFO L226 Difference]: Without dead ends: 329 [2019-12-18 11:44:25,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=287, Invalid=581, Unknown=2, NotChecked=0, Total=870 [2019-12-18 11:44:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-18 11:44:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 216. [2019-12-18 11:44:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:25,839 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:25,839 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:25,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:25,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:25,840 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:26,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:26,041 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:26,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 123 times [2019-12-18 11:44:26,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:26,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151547766] [2019-12-18 11:44:26,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:26,145 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 11:44:26,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151547766] [2019-12-18 11:44:26,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894731090] [2019-12-18 11:44:26,145 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 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 11:44:26,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:44:26,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:26,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:26,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:26,312 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 11:44:26,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:26,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:26,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246168774] [2019-12-18 11:44:26,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:26,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:26,314 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:27,276 WARN L192 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:44:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:29,052 INFO L93 Difference]: Finished difference Result 314 states and 732 transitions. [2019-12-18 11:44:29,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:44:29,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:29,054 INFO L225 Difference]: With dead ends: 314 [2019-12-18 11:44:29,054 INFO L226 Difference]: Without dead ends: 313 [2019-12-18 11:44:29,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=333, Invalid=657, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:44:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-18 11:44:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 214. [2019-12-18 11:44:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:44:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-18 11:44:29,058 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-18 11:44:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:29,059 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-18 11:44:29,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-18 11:44:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:29,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:29,059 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:29,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:29,260 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 124 times [2019-12-18 11:44:29,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:29,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081599869] [2019-12-18 11:44:29,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:29,336 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 11:44:29,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081599869] [2019-12-18 11:44:29,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653798042] [2019-12-18 11:44:29,337 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 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 11:44:29,380 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:29,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:29,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:29,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:29,883 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_421 Int)) (and (<= c_~i~0 (+ v_~i~0_421 c_~j~0)) (<= c_~j~0 (+ v_~i~0_421 2)) (<= (div (+ (* v_~i~0_421 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-18 11:44:29,932 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 11:44:29,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:29,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:29,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128560180] [2019-12-18 11:44:29,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:29,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=192, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:44:29,933 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-18 11:44:30,890 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:44:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:31,541 INFO L93 Difference]: Finished difference Result 302 states and 695 transitions. [2019-12-18 11:44:31,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:31,542 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:31,544 INFO L225 Difference]: With dead ends: 302 [2019-12-18 11:44:31,544 INFO L226 Difference]: Without dead ends: 300 [2019-12-18 11:44:31,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=336, Invalid=658, Unknown=2, NotChecked=60, Total=1056 [2019-12-18 11:44:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-18 11:44:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 217. [2019-12-18 11:44:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-18 11:44:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-18 11:44:31,549 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-18 11:44:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:31,549 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-18 11:44:31,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-18 11:44:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:31,550 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:31,550 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:31,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:31,753 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 125 times [2019-12-18 11:44:31,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:31,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437372679] [2019-12-18 11:44:31,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:31,851 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 11:44:31,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437372679] [2019-12-18 11:44:31,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459924850] [2019-12-18 11:44:31,852 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 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 11:44:31,895 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:31,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:31,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:31,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:32,674 WARN L192 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:44:36,887 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:44:36,888 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 11:44:36,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:36,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:36,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245247214] [2019-12-18 11:44:36,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:36,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:36,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:36,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:36,890 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 18 states. [2019-12-18 11:44:37,667 WARN L192 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-18 11:44:42,273 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:44:46,999 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:44:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:51,176 INFO L93 Difference]: Finished difference Result 319 states and 750 transitions. [2019-12-18 11:44:51,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:51,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:51,178 INFO L225 Difference]: With dead ends: 319 [2019-12-18 11:44:51,178 INFO L226 Difference]: Without dead ends: 318 [2019-12-18 11:44:51,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=328, Invalid=661, Unknown=3, NotChecked=0, Total=992 [2019-12-18 11:44:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-12-18 11:44:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 216. [2019-12-18 11:44:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-18 11:44:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-18 11:44:51,183 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-18 11:44:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:51,183 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-18 11:44:51,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-18 11:44:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:51,184 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:51,184 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:51,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:51,385 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 126 times [2019-12-18 11:44:51,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:51,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377886052] [2019-12-18 11:44:51,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:51,472 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 11:44:51,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377886052] [2019-12-18 11:44:51,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302130684] [2019-12-18 11:44:51,473 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 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 11:44:51,522 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:44:51,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:51,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:51,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:51,856 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 11:44:51,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:51,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:51,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650849229] [2019-12-18 11:44:51,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:51,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:51,857 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-18 11:44:52,520 WARN L192 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:44:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:55,526 INFO L93 Difference]: Finished difference Result 352 states and 825 transitions. [2019-12-18 11:44:55,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:44:55,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:55,528 INFO L225 Difference]: With dead ends: 352 [2019-12-18 11:44:55,528 INFO L226 Difference]: Without dead ends: 350 [2019-12-18 11:44:55,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-12-18 11:44:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2019-12-18 11:44:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-18 11:44:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-18 11:44:55,533 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-18 11:44:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:55,533 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-18 11:44:55,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-18 11:44:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:55,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:55,534 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:55,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:55,734 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:55,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 127 times [2019-12-18 11:44:55,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:55,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615910122] [2019-12-18 11:44:55,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:55,820 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 11:44:55,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615910122] [2019-12-18 11:44:55,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921948237] [2019-12-18 11:44:55,821 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 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 11:44:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:55,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:55,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:56,309 WARN L192 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 11:44:56,782 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_434 Int)) (and (<= c_~j~0 (+ v_~i~0_434 c_~i~0 2)) (<= (div (+ (* v_~i~0_434 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ (* 2 v_~i~0_434) 2)))) is different from true [2019-12-18 11:44:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-18 11:44:56,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:56,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:56,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652235885] [2019-12-18 11:44:56,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:56,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=188, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:44:56,830 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-18 11:44:57,394 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 13 [2019-12-18 11:44:58,133 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-12-18 11:44:58,431 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:45:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:01,723 INFO L93 Difference]: Finished difference Result 346 states and 805 transitions. [2019-12-18 11:45:01,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 11:45:01,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:01,725 INFO L225 Difference]: With dead ends: 346 [2019-12-18 11:45:01,725 INFO L226 Difference]: Without dead ends: 344 [2019-12-18 11:45:01,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=377, Invalid=742, Unknown=7, NotChecked=64, Total=1190 [2019-12-18 11:45:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-12-18 11:45:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 221. [2019-12-18 11:45:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:45:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-18 11:45:01,731 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-18 11:45:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:01,731 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-18 11:45:01,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-18 11:45:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:01,731 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:01,731 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:01,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:01,932 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 128 times [2019-12-18 11:45:01,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:01,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049498620] [2019-12-18 11:45:01,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:02,023 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 11:45:02,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049498620] [2019-12-18 11:45:02,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086015521] [2019-12-18 11:45:02,024 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 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 11:45:02,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:02,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:02,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:02,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:02,197 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 11:45:02,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:02,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:02,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314817341] [2019-12-18 11:45:02,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:02,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:02,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:02,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:02,198 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-18 11:45:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:03,519 INFO L93 Difference]: Finished difference Result 338 states and 792 transitions. [2019-12-18 11:45:03,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:03,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:03,520 INFO L225 Difference]: With dead ends: 338 [2019-12-18 11:45:03,520 INFO L226 Difference]: Without dead ends: 336 [2019-12-18 11:45:03,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-18 11:45:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 223. [2019-12-18 11:45:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-18 11:45:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-18 11:45:03,525 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-18 11:45:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:03,525 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-18 11:45:03,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-18 11:45:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:03,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:03,526 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:03,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:03,727 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 129 times [2019-12-18 11:45:03,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:03,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71607295] [2019-12-18 11:45:03,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:03,812 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 11:45:03,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71607295] [2019-12-18 11:45:03,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601924582] [2019-12-18 11:45:03,813 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:45:03,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:45:03,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:03,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:45:03,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:04,280 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-18 11:45:04,281 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 11:45:04,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:04,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:04,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068358585] [2019-12-18 11:45:04,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:04,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:04,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:04,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:04,282 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-18 11:45:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:06,098 INFO L93 Difference]: Finished difference Result 343 states and 813 transitions. [2019-12-18 11:45:06,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 11:45:06,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:06,099 INFO L225 Difference]: With dead ends: 343 [2019-12-18 11:45:06,099 INFO L226 Difference]: Without dead ends: 341 [2019-12-18 11:45:06,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=424, Invalid=907, Unknown=1, NotChecked=0, Total=1332 [2019-12-18 11:45:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-12-18 11:45:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 221. [2019-12-18 11:45:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:45:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-18 11:45:06,105 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-18 11:45:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:06,105 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-18 11:45:06,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-18 11:45:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:06,105 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:06,105 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:06,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:06,306 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 130 times [2019-12-18 11:45:06,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:06,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142815325] [2019-12-18 11:45:06,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:06,387 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 11:45:06,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142815325] [2019-12-18 11:45:06,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017618182] [2019-12-18 11:45:06,388 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 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 11:45:06,440 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:06,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:06,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:06,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:06,537 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 11:45:06,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:06,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:06,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299959012] [2019-12-18 11:45:06,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:06,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:06,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:06,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:06,538 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-18 11:45:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:06,905 INFO L93 Difference]: Finished difference Result 276 states and 660 transitions. [2019-12-18 11:45:06,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:06,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:06,907 INFO L225 Difference]: With dead ends: 276 [2019-12-18 11:45:06,907 INFO L226 Difference]: Without dead ends: 275 [2019-12-18 11:45:06,907 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 11:45:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-18 11:45:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 222. [2019-12-18 11:45:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:45:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:45:06,911 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:45:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:06,912 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:45:06,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:45:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:06,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:06,912 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:07,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:07,113 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 131 times [2019-12-18 11:45:07,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:07,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386260558] [2019-12-18 11:45:07,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:07,205 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 11:45:07,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386260558] [2019-12-18 11:45:07,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45215270] [2019-12-18 11:45:07,206 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 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 11:45:07,258 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:45:07,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:07,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:07,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:07,367 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 11:45:07,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:07,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:07,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289244114] [2019-12-18 11:45:07,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:07,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:07,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:07,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:07,369 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:45:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:07,811 INFO L93 Difference]: Finished difference Result 326 states and 768 transitions. [2019-12-18 11:45:07,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:45:07,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:07,812 INFO L225 Difference]: With dead ends: 326 [2019-12-18 11:45:07,812 INFO L226 Difference]: Without dead ends: 325 [2019-12-18 11:45:07,813 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 11:45:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-12-18 11:45:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 221. [2019-12-18 11:45:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:45:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-18 11:45:07,818 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-18 11:45:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:07,818 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-18 11:45:07,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-18 11:45:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:07,818 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:07,818 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:08,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:08,019 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 132 times [2019-12-18 11:45:08,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:08,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014342846] [2019-12-18 11:45:08,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:08,106 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 11:45:08,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014342846] [2019-12-18 11:45:08,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20874370] [2019-12-18 11:45:08,107 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:45:08,150 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:08,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:08,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:08,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:08,266 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 11:45:08,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:08,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:08,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758413909] [2019-12-18 11:45:08,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:08,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:08,268 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-18 11:45:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:08,765 INFO L93 Difference]: Finished difference Result 335 states and 798 transitions. [2019-12-18 11:45:08,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:08,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:08,766 INFO L225 Difference]: With dead ends: 335 [2019-12-18 11:45:08,766 INFO L226 Difference]: Without dead ends: 333 [2019-12-18 11:45:08,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:45:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-12-18 11:45:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 222. [2019-12-18 11:45:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:45:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:45:08,771 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:45:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:08,771 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:45:08,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:45:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:08,771 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:08,772 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:08,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:08,972 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:08,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 133 times [2019-12-18 11:45:08,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:08,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196825447] [2019-12-18 11:45:08,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:09,058 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 11:45:09,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196825447] [2019-12-18 11:45:09,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413388271] [2019-12-18 11:45:09,059 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 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 11:45:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:09,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:09,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:09,194 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 11:45:09,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:09,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:09,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088629694] [2019-12-18 11:45:09,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:09,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:09,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:09,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:09,196 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:45:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:09,617 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-18 11:45:09,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:09,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:09,618 INFO L225 Difference]: With dead ends: 341 [2019-12-18 11:45:09,619 INFO L226 Difference]: Without dead ends: 340 [2019-12-18 11:45:09,619 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 11:45:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2019-12-18 11:45:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 222. [2019-12-18 11:45:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:45:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:45:09,623 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:45:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:09,623 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:45:09,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:45:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:09,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:09,624 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:09,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:09,825 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 134 times [2019-12-18 11:45:09,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:09,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830467307] [2019-12-18 11:45:09,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:09,922 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 11:45:09,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830467307] [2019-12-18 11:45:09,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734293639] [2019-12-18 11:45:09,922 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 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 11:45:10,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:10,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:10,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:10,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:10,202 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 11:45:10,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:10,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:10,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673548998] [2019-12-18 11:45:10,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:10,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:10,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:10,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:10,204 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:45:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:10,708 INFO L93 Difference]: Finished difference Result 339 states and 804 transitions. [2019-12-18 11:45:10,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:45:10,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:10,710 INFO L225 Difference]: With dead ends: 339 [2019-12-18 11:45:10,710 INFO L226 Difference]: Without dead ends: 338 [2019-12-18 11:45:10,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:45:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-12-18 11:45:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 222. [2019-12-18 11:45:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-18 11:45:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-18 11:45:10,718 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-18 11:45:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:10,719 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-18 11:45:10,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-18 11:45:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:10,720 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:10,720 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:10,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:10,921 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 135 times [2019-12-18 11:45:10,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:10,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284505156] [2019-12-18 11:45:10,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:11,045 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 11:45:11,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284505156] [2019-12-18 11:45:11,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607645471] [2019-12-18 11:45:11,046 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 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 11:45:11,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:11,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:11,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:11,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:11,258 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 11:45:11,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:11,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:11,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846512018] [2019-12-18 11:45:11,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:11,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:11,260 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-18 11:45:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:11,893 INFO L93 Difference]: Finished difference Result 334 states and 793 transitions. [2019-12-18 11:45:11,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:11,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:11,895 INFO L225 Difference]: With dead ends: 334 [2019-12-18 11:45:11,895 INFO L226 Difference]: Without dead ends: 332 [2019-12-18 11:45:11,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-18 11:45:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 220. [2019-12-18 11:45:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 11:45:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 559 transitions. [2019-12-18 11:45:11,903 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 559 transitions. Word has length 14 [2019-12-18 11:45:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:11,903 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 559 transitions. [2019-12-18 11:45:11,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 559 transitions. [2019-12-18 11:45:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:11,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:11,904 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:12,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:12,109 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 136 times [2019-12-18 11:45:12,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:12,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99335770] [2019-12-18 11:45:12,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:12,208 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 11:45:12,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99335770] [2019-12-18 11:45:12,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273994326] [2019-12-18 11:45:12,208 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 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 11:45:12,254 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:12,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:12,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:12,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:12,828 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 11:45:12,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:12,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:12,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458859901] [2019-12-18 11:45:12,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:12,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:12,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:12,829 INFO L87 Difference]: Start difference. First operand 220 states and 559 transitions. Second operand 18 states. [2019-12-18 11:45:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:13,808 INFO L93 Difference]: Finished difference Result 329 states and 779 transitions. [2019-12-18 11:45:13,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:13,809 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:13,809 INFO L225 Difference]: With dead ends: 329 [2019-12-18 11:45:13,810 INFO L226 Difference]: Without dead ends: 328 [2019-12-18 11:45:13,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=359, Invalid=696, Unknown=1, NotChecked=0, Total=1056 [2019-12-18 11:45:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-18 11:45:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 218. [2019-12-18 11:45:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-18 11:45:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-18 11:45:13,814 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-18 11:45:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:13,815 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-18 11:45:13,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-18 11:45:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:13,815 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:13,815 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:14,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:14,016 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 137 times [2019-12-18 11:45:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:14,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63601990] [2019-12-18 11:45:14,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:14,096 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 11:45:14,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63601990] [2019-12-18 11:45:14,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444291009] [2019-12-18 11:45:14,097 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 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 11:45:14,138 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:45:14,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:14,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:14,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:14,244 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 11:45:14,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:14,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:14,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110087033] [2019-12-18 11:45:14,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:14,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:14,246 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 18 states. [2019-12-18 11:45:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:14,565 INFO L93 Difference]: Finished difference Result 237 states and 572 transitions. [2019-12-18 11:45:14,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:45:14,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:14,567 INFO L225 Difference]: With dead ends: 237 [2019-12-18 11:45:14,567 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:45:14,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:45:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:45:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2019-12-18 11:45:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-18 11:45:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 534 transitions. [2019-12-18 11:45:14,572 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 534 transitions. Word has length 14 [2019-12-18 11:45:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:14,573 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 534 transitions. [2019-12-18 11:45:14,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 534 transitions. [2019-12-18 11:45:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:14,573 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:14,573 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:14,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:14,776 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -591198760, now seen corresponding path program 138 times [2019-12-18 11:45:14,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:14,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517818454] [2019-12-18 11:45:14,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:14,857 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 11:45:14,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517818454] [2019-12-18 11:45:14,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643364898] [2019-12-18 11:45:14,858 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 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 11:45:14,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:45:14,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:14,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:14,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:15,019 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 11:45:15,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:15,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:15,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818791281] [2019-12-18 11:45:15,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:15,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:15,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:15,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:15,021 INFO L87 Difference]: Start difference. First operand 214 states and 534 transitions. Second operand 18 states. [2019-12-18 11:45:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:15,394 INFO L93 Difference]: Finished difference Result 243 states and 585 transitions. [2019-12-18 11:45:15,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:45:15,394 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:15,395 INFO L225 Difference]: With dead ends: 243 [2019-12-18 11:45:15,395 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 11:45:15,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:45:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 11:45:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 210. [2019-12-18 11:45:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:45:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:45:15,399 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:45:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:15,399 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:45:15,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:45:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:15,400 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:15,400 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:15,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:15,602 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:15,602 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 139 times [2019-12-18 11:45:15,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:15,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683151003] [2019-12-18 11:45:15,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:15,683 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 11:45:15,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683151003] [2019-12-18 11:45:15,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884339255] [2019-12-18 11:45:15,684 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:15,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:15,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:16,534 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 11:45:16,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:16,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:16,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297690670] [2019-12-18 11:45:16,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:16,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:16,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:16,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=224, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:16,536 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:17,069 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2019-12-18 11:45:17,650 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-18 11:45:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:18,633 INFO L93 Difference]: Finished difference Result 267 states and 633 transitions. [2019-12-18 11:45:18,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:45:18,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:18,634 INFO L225 Difference]: With dead ends: 267 [2019-12-18 11:45:18,634 INFO L226 Difference]: Without dead ends: 264 [2019-12-18 11:45:18,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=294, Invalid=635, Unknown=1, NotChecked=0, Total=930 [2019-12-18 11:45:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-18 11:45:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 211. [2019-12-18 11:45:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-18 11:45:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-18 11:45:18,638 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-18 11:45:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:18,638 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-18 11:45:18,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-18 11:45:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:18,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:18,639 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:18,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:18,843 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 140 times [2019-12-18 11:45:18,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:18,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096335255] [2019-12-18 11:45:18,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:18,929 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 11:45:18,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096335255] [2019-12-18 11:45:18,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504501247] [2019-12-18 11:45:18,929 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:18,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:18,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:18,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:18,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:19,133 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 11:45:19,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:19,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:19,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774449007] [2019-12-18 11:45:19,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:19,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:19,135 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 18 states. [2019-12-18 11:45:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:19,583 INFO L93 Difference]: Finished difference Result 264 states and 627 transitions. [2019-12-18 11:45:19,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:19,584 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:19,585 INFO L225 Difference]: With dead ends: 264 [2019-12-18 11:45:19,585 INFO L226 Difference]: Without dead ends: 263 [2019-12-18 11:45:19,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-18 11:45:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2019-12-18 11:45:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:45:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:45:19,588 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:45:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:19,588 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:45:19,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:45:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:19,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:19,589 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:19,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:19,790 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:19,790 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 141 times [2019-12-18 11:45:19,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:19,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416628544] [2019-12-18 11:45:19,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:19,870 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 11:45:19,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416628544] [2019-12-18 11:45:19,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872923342] [2019-12-18 11:45:19,871 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:19,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:45:19,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:19,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:19,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:21,261 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 11:45:21,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:21,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:21,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75274252] [2019-12-18 11:45:21,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:21,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:21,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:21,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=222, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:45:21,263 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:23,177 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-18 11:45:23,507 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:45:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:23,756 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2019-12-18 11:45:23,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:23,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:23,758 INFO L225 Difference]: With dead ends: 269 [2019-12-18 11:45:23,758 INFO L226 Difference]: Without dead ends: 265 [2019-12-18 11:45:23,758 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=317, Invalid=670, Unknown=5, NotChecked=0, Total=992 [2019-12-18 11:45:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-18 11:45:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2019-12-18 11:45:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:45:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-18 11:45:23,762 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-18 11:45:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:23,762 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-18 11:45:23,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-18 11:45:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:23,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:23,763 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:23,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:23,964 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 142 times [2019-12-18 11:45:23,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:23,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649251687] [2019-12-18 11:45:23,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:24,051 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 11:45:24,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649251687] [2019-12-18 11:45:24,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598102850] [2019-12-18 11:45:24,052 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:24,094 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:24,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:24,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:24,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:25,094 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 11:45:25,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:25,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:25,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167851453] [2019-12-18 11:45:25,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:25,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:25,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:25,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=223, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:45:25,096 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-18 11:45:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:25,804 INFO L93 Difference]: Finished difference Result 302 states and 698 transitions. [2019-12-18 11:45:25,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:25,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:25,805 INFO L225 Difference]: With dead ends: 302 [2019-12-18 11:45:25,805 INFO L226 Difference]: Without dead ends: 300 [2019-12-18 11:45:25,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=677, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:45:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-18 11:45:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 212. [2019-12-18 11:45:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:45:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-18 11:45:25,810 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-18 11:45:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:25,811 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-18 11:45:25,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-18 11:45:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:25,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:25,811 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:26,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:26,012 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 143 times [2019-12-18 11:45:26,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:26,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488399575] [2019-12-18 11:45:26,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:26,142 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 11:45:26,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488399575] [2019-12-18 11:45:26,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932914774] [2019-12-18 11:45:26,143 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:26,217 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:26,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:26,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:26,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:26,450 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 11:45:26,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:26,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:26,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917225668] [2019-12-18 11:45:26,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:26,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:26,452 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-18 11:45:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:27,375 INFO L93 Difference]: Finished difference Result 287 states and 672 transitions. [2019-12-18 11:45:27,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:27,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:27,377 INFO L225 Difference]: With dead ends: 287 [2019-12-18 11:45:27,377 INFO L226 Difference]: Without dead ends: 286 [2019-12-18 11:45:27,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-18 11:45:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 210. [2019-12-18 11:45:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-18 11:45:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-18 11:45:27,385 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-18 11:45:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:27,385 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-18 11:45:27,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-18 11:45:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:27,386 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:27,386 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:27,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:27,591 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash -595816210, now seen corresponding path program 144 times [2019-12-18 11:45:27,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:27,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643297510] [2019-12-18 11:45:27,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:27,723 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 11:45:27,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643297510] [2019-12-18 11:45:27,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897470113] [2019-12-18 11:45:27,724 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:27,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:45:27,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:27,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:27,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:28,736 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 11:45:28,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:28,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:28,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133200236] [2019-12-18 11:45:28,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:28,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:28,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:28,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=223, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:45:28,738 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-18 11:45:29,215 WARN L192 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2019-12-18 11:45:31,505 WARN L192 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:45:32,112 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:45:34,447 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:45:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:34,838 INFO L93 Difference]: Finished difference Result 279 states and 650 transitions. [2019-12-18 11:45:34,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 11:45:34,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:34,840 INFO L225 Difference]: With dead ends: 279 [2019-12-18 11:45:34,840 INFO L226 Difference]: Without dead ends: 274 [2019-12-18 11:45:34,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=369, Invalid=814, Unknown=7, NotChecked=0, Total=1190 [2019-12-18 11:45:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-18 11:45:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 213. [2019-12-18 11:45:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-18 11:45:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-18 11:45:34,845 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-18 11:45:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:34,845 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-18 11:45:34,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-18 11:45:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:34,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:34,845 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:35,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:35,046 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:35,047 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 145 times [2019-12-18 11:45:35,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:35,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283578336] [2019-12-18 11:45:35,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:35,132 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 11:45:35,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283578336] [2019-12-18 11:45:35,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297414040] [2019-12-18 11:45:35,133 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:35,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:35,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:41,640 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 11:45:41,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:41,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:41,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868829770] [2019-12-18 11:45:41,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:41,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:41,642 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 18 states. [2019-12-18 11:45:42,252 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 11:45:47,058 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 11:45:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:47,129 INFO L93 Difference]: Finished difference Result 300 states and 693 transitions. [2019-12-18 11:45:47,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:47,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:47,131 INFO L225 Difference]: With dead ends: 300 [2019-12-18 11:45:47,131 INFO L226 Difference]: Without dead ends: 299 [2019-12-18 11:45:47,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=316, Invalid=675, Unknown=1, NotChecked=0, Total=992 [2019-12-18 11:45:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-12-18 11:45:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 212. [2019-12-18 11:45:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-18 11:45:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-18 11:45:47,136 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-18 11:45:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:47,136 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-18 11:45:47,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-18 11:45:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:47,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:47,136 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:47,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:47,337 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:47,338 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 146 times [2019-12-18 11:45:47,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:47,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845326249] [2019-12-18 11:45:47,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:47,433 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 11:45:47,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845326249] [2019-12-18 11:45:47,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485257026] [2019-12-18 11:45:47,434 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:47,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:47,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:47,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:47,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:48,790 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 11:45:48,791 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 11:45:48,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:48,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:48,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539571875] [2019-12-18 11:45:48,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:48,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:48,792 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-18 11:45:49,401 WARN L192 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 11:45:50,655 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 Received shutdown request... [2019-12-18 11:45:52,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:45:53,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:53,191 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 11:45:53,197 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 11:45:53,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:45:53 BasicIcfg [2019-12-18 11:45:53,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:45:53,198 INFO L168 Benchmark]: Toolchain (without parser) took 282586.20 ms. Allocated memory was 146.3 MB in the beginning and 179.3 MB in the end (delta: 33.0 MB). Free memory was 102.0 MB in the beginning and 136.1 MB in the end (delta: -34.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:45:53,199 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 11:45:53,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.99 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.6 MB in the beginning and 163.5 MB in the end (delta: -61.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:53,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.77 ms. Allocated memory is still 203.4 MB. Free memory was 163.5 MB in the beginning and 160.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:53,199 INFO L168 Benchmark]: Boogie Preprocessor took 29.96 ms. Allocated memory is still 203.4 MB. Free memory was 160.9 MB in the beginning and 159.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:53,200 INFO L168 Benchmark]: RCFGBuilder took 447.48 ms. Allocated memory is still 203.4 MB. Free memory was 159.7 MB in the beginning and 139.9 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:53,200 INFO L168 Benchmark]: TraceAbstraction took 281309.78 ms. Allocated memory was 203.4 MB in the beginning and 179.3 MB in the end (delta: -24.1 MB). Free memory was 139.9 MB in the beginning and 136.1 MB in the end (delta: 3.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:45:53,202 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 722.99 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.6 MB in the beginning and 163.5 MB in the end (delta: -61.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 70.77 ms. Allocated memory is still 203.4 MB. Free memory was 163.5 MB in the beginning and 160.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.96 ms. Allocated memory is still 203.4 MB. Free memory was 160.9 MB in the beginning and 159.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 447.48 ms. Allocated memory is still 203.4 MB. Free memory was 159.7 MB in the beginning and 139.9 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 281309.78 ms. Allocated memory was 203.4 MB in the beginning and 179.3 MB in the end (delta: -24.1 MB). Free memory was 139.9 MB in the beginning and 136.1 MB in the end (delta: 3.7 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 constructing difference of abstraction (212states) and FLOYD_HOARE automaton (currently 16 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (67 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 281.1s, OverallIterations: 161, TraceHistogramMax: 7, AutomataDifference: 168.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1538 SDtfs, 21787 SDslu, 12792 SDs, 0 SdLazy, 7120 SolverSat, 3956 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 48.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4363 GetRequests, 772 SyntacticMatches, 15 SemanticMatches, 3576 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 20386 ImplicationChecksByTransitivity, 183.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 160 MinimizatonAttempts, 8203 StatesRemovedByMinimization, 157 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 69.0s InterpolantComputationTime, 4001 NumberOfCodeBlocks, 4001 NumberOfCodeBlocksAsserted, 522 NumberOfCheckSat, 3684 ConstructedInterpolants, 149 QuantifiedInterpolants, 426419 SizeOfPredicates, 6 NumberOfNonLiveVariables, 14422 ConjunctsInSsa, 1703 ConjunctsInUnsatCore, 317 InterpolantComputations, 7 PerfectInterpolantSequences, 42/2324 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