/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 23:31:15,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 23:31:15,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 23:31:15,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 23:31:15,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 23:31:15,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 23:31:15,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 23:31:15,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 23:31:15,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 23:31:15,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 23:31:15,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 23:31:15,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 23:31:15,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 23:31:15,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 23:31:15,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 23:31:15,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 23:31:15,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 23:31:15,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 23:31:15,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 23:31:15,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 23:31:15,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 23:31:15,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 23:31:15,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 23:31:15,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 23:31:15,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 23:31:15,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 23:31:15,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 23:31:15,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 23:31:15,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 23:31:15,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 23:31:15,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 23:31:15,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 23:31:15,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 23:31:15,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 23:31:15,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 23:31:15,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 23:31:15,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 23:31:15,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 23:31:15,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 23:31:15,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 23:31:15,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 23:31:15,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2019-12-18 23:31:15,426 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 23:31:15,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 23:31:15,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 23:31:15,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 23:31:15,431 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 23:31:15,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 23:31:15,431 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 23:31:15,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 23:31:15,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 23:31:15,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 23:31:15,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 23:31:15,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 23:31:15,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 23:31:15,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 23:31:15,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 23:31:15,433 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 23:31:15,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 23:31:15,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 23:31:15,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 23:31:15,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 23:31:15,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 23:31:15,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 23:31:15,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 23:31:15,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 23:31:15,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 23:31:15,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 23:31:15,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 23:31:15,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-18 23:31:15,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 23:31:15,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 23:31:15,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 23:31:15,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 23:31:15,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 23:31:15,739 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 23:31:15,740 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 23:31:15,740 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-18 23:31:15,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ddaf07aa/37a0ed298e5a42f2ba11dd0f8586dbba/FLAG577a45e8c [2019-12-18 23:31:16,295 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 23:31:16,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-18 23:31:16,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ddaf07aa/37a0ed298e5a42f2ba11dd0f8586dbba/FLAG577a45e8c [2019-12-18 23:31:16,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ddaf07aa/37a0ed298e5a42f2ba11dd0f8586dbba [2019-12-18 23:31:16,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 23:31:16,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 23:31:16,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 23:31:16,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 23:31:16,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 23:31:16,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:31:16" (1/1) ... [2019-12-18 23:31:16,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b291f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:16, skipping insertion in model container [2019-12-18 23:31:16,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:31:16" (1/1) ... [2019-12-18 23:31:16,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 23:31:16,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 23:31:17,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:31:17,303 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 23:31:17,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:31:17,467 INFO L208 MainTranslator]: Completed translation [2019-12-18 23:31:17,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17 WrapperNode [2019-12-18 23:31:17,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 23:31:17,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 23:31:17,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 23:31:17,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 23:31:17,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 23:31:17,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 23:31:17,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 23:31:17,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 23:31:17,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (1/1) ... [2019-12-18 23:31:17,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 23:31:17,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 23:31:17,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 23:31:17,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 23:31:17,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (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 23:31:17,592 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 23:31:17,592 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 23:31:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 23:31:17,593 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 23:31:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 23:31:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 23:31:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 23:31:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 23:31:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 23:31:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 23:31:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 23:31:17,596 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 23:31:17,967 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 23:31:17,968 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 23:31:17,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:31:17 BoogieIcfgContainer [2019-12-18 23:31:17,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 23:31:17,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 23:31:17,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 23:31:17,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 23:31:17,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:31:16" (1/3) ... [2019-12-18 23:31:17,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bab766a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:31:17, skipping insertion in model container [2019-12-18 23:31:17,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:17" (2/3) ... [2019-12-18 23:31:17,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bab766a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:31:17, skipping insertion in model container [2019-12-18 23:31:17,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:31:17" (3/3) ... [2019-12-18 23:31:17,978 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2019-12-18 23:31:17,989 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 23:31:17,989 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 23:31:17,996 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 23:31:17,997 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 23:31:18,023 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,024 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,024 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,024 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,024 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,025 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,025 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,025 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,025 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,026 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,026 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,026 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,026 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,027 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,027 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,027 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,028 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,028 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,028 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,028 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,028 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,029 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,029 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,029 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,030 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,030 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,030 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,030 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,031 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,031 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,035 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,036 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,036 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,036 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,036 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,037 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,047 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,047 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,048 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,048 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,048 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,048 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:18,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 23:31:18,084 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 23:31:18,084 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 23:31:18,084 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 23:31:18,084 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 23:31:18,084 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 23:31:18,084 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 23:31:18,085 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 23:31:18,085 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 23:31:18,094 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 53 transitions [2019-12-18 23:31:18,177 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1244 states. [2019-12-18 23:31:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states. [2019-12-18 23:31:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 23:31:18,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:18,190 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:18,191 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash -54944204, now seen corresponding path program 1 times [2019-12-18 23:31:18,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:18,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412016039] [2019-12-18 23:31:18,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:18,585 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 23:31:18,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412016039] [2019-12-18 23:31:18,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:18,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:31:18,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612153698] [2019-12-18 23:31:18,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:31:18,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:31:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:31:18,613 INFO L87 Difference]: Start difference. First operand 1244 states. Second operand 5 states. [2019-12-18 23:31:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:18,817 INFO L93 Difference]: Finished difference Result 2093 states and 6041 transitions. [2019-12-18 23:31:18,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:31:18,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-18 23:31:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:18,846 INFO L225 Difference]: With dead ends: 2093 [2019-12-18 23:31:18,846 INFO L226 Difference]: Without dead ends: 572 [2019-12-18 23:31:18,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:31:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-12-18 23:31:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 460. [2019-12-18 23:31:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-12-18 23:31:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1179 transitions. [2019-12-18 23:31:18,936 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1179 transitions. Word has length 20 [2019-12-18 23:31:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:18,937 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 1179 transitions. [2019-12-18 23:31:18,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:31:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1179 transitions. [2019-12-18 23:31:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-18 23:31:18,938 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:18,939 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:18,939 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:18,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1539658704, now seen corresponding path program 1 times [2019-12-18 23:31:18,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:18,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460617238] [2019-12-18 23:31:18,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:19,111 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 23:31:19,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460617238] [2019-12-18 23:31:19,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:19,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:31:19,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620272494] [2019-12-18 23:31:19,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:31:19,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:31:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:31:19,115 INFO L87 Difference]: Start difference. First operand 460 states and 1179 transitions. Second operand 6 states. [2019-12-18 23:31:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:19,279 INFO L93 Difference]: Finished difference Result 908 states and 2257 transitions. [2019-12-18 23:31:19,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 23:31:19,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-18 23:31:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:19,285 INFO L225 Difference]: With dead ends: 908 [2019-12-18 23:31:19,285 INFO L226 Difference]: Without dead ends: 673 [2019-12-18 23:31:19,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:31:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-12-18 23:31:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 554. [2019-12-18 23:31:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-12-18 23:31:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1367 transitions. [2019-12-18 23:31:19,316 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1367 transitions. Word has length 24 [2019-12-18 23:31:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:19,316 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 1367 transitions. [2019-12-18 23:31:19,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:31:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1367 transitions. [2019-12-18 23:31:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 23:31:19,319 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:19,319 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:19,319 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -391152653, now seen corresponding path program 1 times [2019-12-18 23:31:19,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:19,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760035622] [2019-12-18 23:31:19,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:19,491 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 23:31:19,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760035622] [2019-12-18 23:31:19,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995172478] [2019-12-18 23:31:19,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:19,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:31:19,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:19,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,676 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 23:31:19,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:19,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-18 23:31:19,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130535064] [2019-12-18 23:31:19,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:31:19,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:31:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:31:19,681 INFO L87 Difference]: Start difference. First operand 554 states and 1367 transitions. Second operand 10 states. [2019-12-18 23:31:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:19,838 INFO L93 Difference]: Finished difference Result 1051 states and 2564 transitions. [2019-12-18 23:31:19,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:31:19,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-12-18 23:31:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:19,845 INFO L225 Difference]: With dead ends: 1051 [2019-12-18 23:31:19,845 INFO L226 Difference]: Without dead ends: 795 [2019-12-18 23:31:19,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2019-12-18 23:31:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 653. [2019-12-18 23:31:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-12-18 23:31:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1575 transitions. [2019-12-18 23:31:19,876 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1575 transitions. Word has length 28 [2019-12-18 23:31:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:19,876 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1575 transitions. [2019-12-18 23:31:19,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:31:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1575 transitions. [2019-12-18 23:31:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-18 23:31:19,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:19,903 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:20,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:20,104 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1122021942, now seen corresponding path program 2 times [2019-12-18 23:31:20,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:20,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155002433] [2019-12-18 23:31:20,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:20,298 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 23:31:20,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155002433] [2019-12-18 23:31:20,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693943347] [2019-12-18 23:31:20,299 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 23:31:20,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:20,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:20,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:31:20,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:20,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:20,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:20,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:20,459 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 23:31:20,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:20,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 23:31:20,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411399191] [2019-12-18 23:31:20,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:31:20,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:20,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:31:20,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:20,462 INFO L87 Difference]: Start difference. First operand 653 states and 1575 transitions. Second operand 12 states. [2019-12-18 23:31:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:20,681 INFO L93 Difference]: Finished difference Result 1187 states and 2864 transitions. [2019-12-18 23:31:20,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 23:31:20,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-18 23:31:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:20,689 INFO L225 Difference]: With dead ends: 1187 [2019-12-18 23:31:20,690 INFO L226 Difference]: Without dead ends: 915 [2019-12-18 23:31:20,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2019-12-18 23:31:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2019-12-18 23:31:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2019-12-18 23:31:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1693 transitions. [2019-12-18 23:31:20,716 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1693 transitions. Word has length 32 [2019-12-18 23:31:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:20,716 INFO L462 AbstractCegarLoop]: Abstraction has 713 states and 1693 transitions. [2019-12-18 23:31:20,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:31:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1693 transitions. [2019-12-18 23:31:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-18 23:31:20,718 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:20,718 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:20,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:20,935 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash 569065911, now seen corresponding path program 1 times [2019-12-18 23:31:20,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:20,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936477248] [2019-12-18 23:31:20,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:21,069 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 23:31:21,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936477248] [2019-12-18 23:31:21,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096704893] [2019-12-18 23:31:21,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:31:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:21,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:31:21,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:21,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,249 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 23:31:21,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:21,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 23:31:21,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555970189] [2019-12-18 23:31:21,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:31:21,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:31:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:21,252 INFO L87 Difference]: Start difference. First operand 713 states and 1693 transitions. Second operand 12 states. [2019-12-18 23:31:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:21,524 INFO L93 Difference]: Finished difference Result 1303 states and 3068 transitions. [2019-12-18 23:31:21,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 23:31:21,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-18 23:31:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:21,532 INFO L225 Difference]: With dead ends: 1303 [2019-12-18 23:31:21,532 INFO L226 Difference]: Without dead ends: 1096 [2019-12-18 23:31:21,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:31:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2019-12-18 23:31:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 812. [2019-12-18 23:31:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-12-18 23:31:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1908 transitions. [2019-12-18 23:31:21,562 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1908 transitions. Word has length 32 [2019-12-18 23:31:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:21,565 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1908 transitions. [2019-12-18 23:31:21,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:31:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1908 transitions. [2019-12-18 23:31:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:21,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:21,569 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:21,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:21,773 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash -129917318, now seen corresponding path program 2 times [2019-12-18 23:31:21,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:21,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201965253] [2019-12-18 23:31:21,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:21,935 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 23:31:21,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201965253] [2019-12-18 23:31:21,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711845940] [2019-12-18 23:31:21,936 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 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 23:31:21,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:21,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:21,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:21,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:22,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:22,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:22,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:22,184 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 23:31:22,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:22,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:22,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320170202] [2019-12-18 23:31:22,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:22,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:22,189 INFO L87 Difference]: Start difference. First operand 812 states and 1908 transitions. Second operand 14 states. [2019-12-18 23:31:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:22,636 INFO L93 Difference]: Finished difference Result 1488 states and 3466 transitions. [2019-12-18 23:31:22,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:31:22,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:22,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:22,645 INFO L225 Difference]: With dead ends: 1488 [2019-12-18 23:31:22,645 INFO L226 Difference]: Without dead ends: 1216 [2019-12-18 23:31:22,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:31:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-12-18 23:31:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 829. [2019-12-18 23:31:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829 states. [2019-12-18 23:31:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1930 transitions. [2019-12-18 23:31:22,673 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1930 transitions. Word has length 36 [2019-12-18 23:31:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:22,674 INFO L462 AbstractCegarLoop]: Abstraction has 829 states and 1930 transitions. [2019-12-18 23:31:22,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1930 transitions. [2019-12-18 23:31:22,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:22,676 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:22,676 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:22,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:22,879 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1266196844, now seen corresponding path program 1 times [2019-12-18 23:31:22,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:22,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699417409] [2019-12-18 23:31:22,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:23,018 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 23:31:23,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699417409] [2019-12-18 23:31:23,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104421501] [2019-12-18 23:31:23,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:23,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:23,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:23,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,261 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 23:31:23,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:23,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:23,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029196749] [2019-12-18 23:31:23,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:23,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:23,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:23,271 INFO L87 Difference]: Start difference. First operand 829 states and 1930 transitions. Second operand 14 states. [2019-12-18 23:31:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:23,617 INFO L93 Difference]: Finished difference Result 1644 states and 3750 transitions. [2019-12-18 23:31:23,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 23:31:23,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:23,626 INFO L225 Difference]: With dead ends: 1644 [2019-12-18 23:31:23,643 INFO L226 Difference]: Without dead ends: 1437 [2019-12-18 23:31:23,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-12-18 23:31:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2019-12-18 23:31:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 894. [2019-12-18 23:31:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-12-18 23:31:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2072 transitions. [2019-12-18 23:31:23,674 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2072 transitions. Word has length 36 [2019-12-18 23:31:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:23,676 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 2072 transitions. [2019-12-18 23:31:23,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2072 transitions. [2019-12-18 23:31:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:23,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:23,680 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:23,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:23,892 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2019356946, now seen corresponding path program 2 times [2019-12-18 23:31:23,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:23,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446442493] [2019-12-18 23:31:23,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:24,036 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 23:31:24,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446442493] [2019-12-18 23:31:24,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22794990] [2019-12-18 23:31:24,037 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 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 23:31:24,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:24,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:24,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:24,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:24,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:24,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:24,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:24,269 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 23:31:24,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:24,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:24,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241314059] [2019-12-18 23:31:24,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:24,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:24,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:24,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:24,272 INFO L87 Difference]: Start difference. First operand 894 states and 2072 transitions. Second operand 14 states. [2019-12-18 23:31:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:24,621 INFO L93 Difference]: Finished difference Result 1655 states and 3760 transitions. [2019-12-18 23:31:24,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:31:24,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:24,632 INFO L225 Difference]: With dead ends: 1655 [2019-12-18 23:31:24,633 INFO L226 Difference]: Without dead ends: 1490 [2019-12-18 23:31:24,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:31:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2019-12-18 23:31:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 912. [2019-12-18 23:31:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 912 states. [2019-12-18 23:31:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2102 transitions. [2019-12-18 23:31:24,666 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2102 transitions. Word has length 36 [2019-12-18 23:31:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:24,666 INFO L462 AbstractCegarLoop]: Abstraction has 912 states and 2102 transitions. [2019-12-18 23:31:24,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2102 transitions. [2019-12-18 23:31:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:24,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:24,668 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:24,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:24,875 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash -825892419, now seen corresponding path program 3 times [2019-12-18 23:31:24,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:24,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247573270] [2019-12-18 23:31:24,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:25,044 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 23:31:25,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247573270] [2019-12-18 23:31:25,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917309769] [2019-12-18 23:31:25,045 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:31:25,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:31:25,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:25,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:25,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:25,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,533 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 23:31:25,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:25,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:25,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802813203] [2019-12-18 23:31:25,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:25,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:25,536 INFO L87 Difference]: Start difference. First operand 912 states and 2102 transitions. Second operand 16 states. [2019-12-18 23:31:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:26,203 INFO L93 Difference]: Finished difference Result 1767 states and 4025 transitions. [2019-12-18 23:31:26,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 23:31:26,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:26,214 INFO L225 Difference]: With dead ends: 1767 [2019-12-18 23:31:26,215 INFO L226 Difference]: Without dead ends: 1495 [2019-12-18 23:31:26,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:31:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2019-12-18 23:31:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 940. [2019-12-18 23:31:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2019-12-18 23:31:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2162 transitions. [2019-12-18 23:31:26,245 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2162 transitions. Word has length 40 [2019-12-18 23:31:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:26,246 INFO L462 AbstractCegarLoop]: Abstraction has 940 states and 2162 transitions. [2019-12-18 23:31:26,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2162 transitions. [2019-12-18 23:31:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:26,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:26,248 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:26,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:26,457 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1962171945, now seen corresponding path program 3 times [2019-12-18 23:31:26,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:26,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91622261] [2019-12-18 23:31:26,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:26,611 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 23:31:26,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91622261] [2019-12-18 23:31:26,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164085130] [2019-12-18 23:31:26,612 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 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 23:31:26,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:26,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:26,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:26,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:26,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,903 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 23:31:26,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:26,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:26,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242310826] [2019-12-18 23:31:26,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:26,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:26,906 INFO L87 Difference]: Start difference. First operand 940 states and 2162 transitions. Second operand 16 states. [2019-12-18 23:31:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:27,371 INFO L93 Difference]: Finished difference Result 1815 states and 4080 transitions. [2019-12-18 23:31:27,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:27,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:27,383 INFO L225 Difference]: With dead ends: 1815 [2019-12-18 23:31:27,383 INFO L226 Difference]: Without dead ends: 1650 [2019-12-18 23:31:27,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:31:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2019-12-18 23:31:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 968. [2019-12-18 23:31:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2019-12-18 23:31:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2229 transitions. [2019-12-18 23:31:27,422 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2229 transitions. Word has length 40 [2019-12-18 23:31:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:27,423 INFO L462 AbstractCegarLoop]: Abstraction has 968 states and 2229 transitions. [2019-12-18 23:31:27,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2229 transitions. [2019-12-18 23:31:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:27,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:27,425 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:27,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:27,630 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1579635249, now seen corresponding path program 4 times [2019-12-18 23:31:27,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:27,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730029594] [2019-12-18 23:31:27,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:27,768 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 23:31:27,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730029594] [2019-12-18 23:31:27,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807993286] [2019-12-18 23:31:27,769 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 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 23:31:27,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:27,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:27,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:27,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:27,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:27,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:27,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:27,940 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 23:31:27,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:27,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:27,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637959059] [2019-12-18 23:31:27,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:27,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:27,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:27,942 INFO L87 Difference]: Start difference. First operand 968 states and 2229 transitions. Second operand 16 states. [2019-12-18 23:31:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:28,443 INFO L93 Difference]: Finished difference Result 1982 states and 4425 transitions. [2019-12-18 23:31:28,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:31:28,444 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:28,451 INFO L225 Difference]: With dead ends: 1982 [2019-12-18 23:31:28,452 INFO L226 Difference]: Without dead ends: 1817 [2019-12-18 23:31:28,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:31:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2019-12-18 23:31:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 986. [2019-12-18 23:31:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 986 states. [2019-12-18 23:31:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2292 transitions. [2019-12-18 23:31:28,481 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2292 transitions. Word has length 40 [2019-12-18 23:31:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:28,481 INFO L462 AbstractCegarLoop]: Abstraction has 986 states and 2292 transitions. [2019-12-18 23:31:28,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2292 transitions. [2019-12-18 23:31:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:28,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:28,483 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:28,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:28,687 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash 962120459, now seen corresponding path program 1 times [2019-12-18 23:31:28,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:28,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076676528] [2019-12-18 23:31:28,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:28,809 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 23:31:28,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076676528] [2019-12-18 23:31:28,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916800726] [2019-12-18 23:31:28,810 INFO L94 rtionOrderModulation]: Keeping assertion order 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 23:31:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:28,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:28,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:28,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,970 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 23:31:28,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:28,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:28,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167183751] [2019-12-18 23:31:28,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:28,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:28,971 INFO L87 Difference]: Start difference. First operand 986 states and 2292 transitions. Second operand 16 states. [2019-12-18 23:31:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:29,295 INFO L93 Difference]: Finished difference Result 1793 states and 4072 transitions. [2019-12-18 23:31:29,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 23:31:29,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:29,304 INFO L225 Difference]: With dead ends: 1793 [2019-12-18 23:31:29,304 INFO L226 Difference]: Without dead ends: 1586 [2019-12-18 23:31:29,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:31:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2019-12-18 23:31:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1031. [2019-12-18 23:31:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-12-18 23:31:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2381 transitions. [2019-12-18 23:31:29,335 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2381 transitions. Word has length 40 [2019-12-18 23:31:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:29,335 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 2381 transitions. [2019-12-18 23:31:29,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2381 transitions. [2019-12-18 23:31:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:29,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:29,338 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:29,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:29,550 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1748392641, now seen corresponding path program 5 times [2019-12-18 23:31:29,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:29,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96822101] [2019-12-18 23:31:29,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:29,706 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 23:31:29,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96822101] [2019-12-18 23:31:29,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097484346] [2019-12-18 23:31:29,707 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 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 23:31:29,801 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:31:29,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:29,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:29,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:29,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:29,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:29,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:29,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:29,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:29,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75352558] [2019-12-18 23:31:29,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:29,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:29,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:29,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:29,950 INFO L87 Difference]: Start difference. First operand 1031 states and 2381 transitions. Second operand 16 states. [2019-12-18 23:31:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:30,491 INFO L93 Difference]: Finished difference Result 1956 states and 4369 transitions. [2019-12-18 23:31:30,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 23:31:30,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:30,501 INFO L225 Difference]: With dead ends: 1956 [2019-12-18 23:31:30,502 INFO L226 Difference]: Without dead ends: 1791 [2019-12-18 23:31:30,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:31:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2019-12-18 23:31:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1065. [2019-12-18 23:31:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-12-18 23:31:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2451 transitions. [2019-12-18 23:31:30,531 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2451 transitions. Word has length 40 [2019-12-18 23:31:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:30,531 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 2451 transitions. [2019-12-18 23:31:30,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2451 transitions. [2019-12-18 23:31:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:30,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:30,533 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:30,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:30,737 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 862358426, now seen corresponding path program 6 times [2019-12-18 23:31:30,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:30,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136920746] [2019-12-18 23:31:30,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:30,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136920746] [2019-12-18 23:31:30,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371484034] [2019-12-18 23:31:30,901 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:31:30,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:30,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:30,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:30,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:31,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:31,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:31,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:31,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:31,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:31,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606371608] [2019-12-18 23:31:31,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:31,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=236, Unknown=2, NotChecked=0, Total=306 [2019-12-18 23:31:31,915 INFO L87 Difference]: Start difference. First operand 1065 states and 2451 transitions. Second operand 18 states. [2019-12-18 23:31:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:34,838 INFO L93 Difference]: Finished difference Result 2211 states and 4932 transitions. [2019-12-18 23:31:34,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:34,838 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:34,852 INFO L225 Difference]: With dead ends: 2211 [2019-12-18 23:31:34,852 INFO L226 Difference]: Without dead ends: 1939 [2019-12-18 23:31:34,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=233, Invalid=882, Unknown=7, NotChecked=0, Total=1122 [2019-12-18 23:31:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2019-12-18 23:31:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1136. [2019-12-18 23:31:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1136 states. [2019-12-18 23:31:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 2629 transitions. [2019-12-18 23:31:34,882 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 2629 transitions. Word has length 44 [2019-12-18 23:31:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:34,882 INFO L462 AbstractCegarLoop]: Abstraction has 1136 states and 2629 transitions. [2019-12-18 23:31:34,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 2629 transitions. [2019-12-18 23:31:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:34,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:34,884 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:35,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:35,095 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash -667242828, now seen corresponding path program 7 times [2019-12-18 23:31:35,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:35,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521452914] [2019-12-18 23:31:35,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:35,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521452914] [2019-12-18 23:31:35,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695031822] [2019-12-18 23:31:35,257 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 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 23:31:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:35,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:35,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:35,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:35,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:35,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:35,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089423059] [2019-12-18 23:31:35,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:35,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:35,482 INFO L87 Difference]: Start difference. First operand 1136 states and 2629 transitions. Second operand 18 states. [2019-12-18 23:31:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:36,149 INFO L93 Difference]: Finished difference Result 2268 states and 5009 transitions. [2019-12-18 23:31:36,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:36,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:36,155 INFO L225 Difference]: With dead ends: 2268 [2019-12-18 23:31:36,155 INFO L226 Difference]: Without dead ends: 2103 [2019-12-18 23:31:36,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2019-12-18 23:31:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1184. [2019-12-18 23:31:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-12-18 23:31:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2749 transitions. [2019-12-18 23:31:36,186 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2749 transitions. Word has length 44 [2019-12-18 23:31:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:36,187 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 2749 transitions. [2019-12-18 23:31:36,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2749 transitions. [2019-12-18 23:31:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:36,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:36,189 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:36,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:36,394 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 109198324, now seen corresponding path program 8 times [2019-12-18 23:31:36,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:36,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147323430] [2019-12-18 23:31:36,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:36,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147323430] [2019-12-18 23:31:36,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777244556] [2019-12-18 23:31:36,584 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 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 23:31:36,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:36,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:36,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:36,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:36,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:36,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:36,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:36,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617261066] [2019-12-18 23:31:36,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:36,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:36,881 INFO L87 Difference]: Start difference. First operand 1184 states and 2749 transitions. Second operand 18 states. [2019-12-18 23:31:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:38,042 INFO L93 Difference]: Finished difference Result 2267 states and 5027 transitions. [2019-12-18 23:31:38,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:31:38,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:38,056 INFO L225 Difference]: With dead ends: 2267 [2019-12-18 23:31:38,056 INFO L226 Difference]: Without dead ends: 2102 [2019-12-18 23:31:38,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 23:31:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2019-12-18 23:31:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1184. [2019-12-18 23:31:38,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-12-18 23:31:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2749 transitions. [2019-12-18 23:31:38,089 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2749 transitions. Word has length 44 [2019-12-18 23:31:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:38,089 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 2749 transitions. [2019-12-18 23:31:38,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2749 transitions. [2019-12-18 23:31:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:38,091 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:38,092 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:38,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:38,295 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1990741044, now seen corresponding path program 9 times [2019-12-18 23:31:38,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:38,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542814255] [2019-12-18 23:31:38,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:38,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542814255] [2019-12-18 23:31:38,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177624070] [2019-12-18 23:31:38,488 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 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 23:31:38,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:31:38,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:38,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:38,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:38,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:38,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:38,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:38,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:38,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:38,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686967604] [2019-12-18 23:31:38,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:38,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:38,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:38,688 INFO L87 Difference]: Start difference. First operand 1184 states and 2749 transitions. Second operand 18 states. [2019-12-18 23:31:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:39,281 INFO L93 Difference]: Finished difference Result 2240 states and 4982 transitions. [2019-12-18 23:31:39,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:39,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:39,286 INFO L225 Difference]: With dead ends: 2240 [2019-12-18 23:31:39,287 INFO L226 Difference]: Without dead ends: 2075 [2019-12-18 23:31:39,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2019-12-18 23:31:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1184. [2019-12-18 23:31:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-12-18 23:31:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2749 transitions. [2019-12-18 23:31:39,332 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2749 transitions. Word has length 44 [2019-12-18 23:31:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:39,332 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 2749 transitions. [2019-12-18 23:31:39,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2749 transitions. [2019-12-18 23:31:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:39,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:39,336 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:39,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:39,540 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash 268124686, now seen corresponding path program 10 times [2019-12-18 23:31:39,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:39,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390431150] [2019-12-18 23:31:39,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:39,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390431150] [2019-12-18 23:31:39,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534204836] [2019-12-18 23:31:39,708 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:31:39,772 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:39,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:39,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:39,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:40,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:40,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:40,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:40,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:40,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:40,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207277870] [2019-12-18 23:31:40,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:40,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=237, Unknown=1, NotChecked=0, Total=306 [2019-12-18 23:31:40,852 INFO L87 Difference]: Start difference. First operand 1184 states and 2749 transitions. Second operand 18 states. [2019-12-18 23:31:42,473 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 23:31:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:44,688 INFO L93 Difference]: Finished difference Result 2392 states and 5309 transitions. [2019-12-18 23:31:44,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:44,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:44,694 INFO L225 Difference]: With dead ends: 2392 [2019-12-18 23:31:44,694 INFO L226 Difference]: Without dead ends: 2227 [2019-12-18 23:31:44,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=247, Invalid=872, Unknown=3, NotChecked=0, Total=1122 [2019-12-18 23:31:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2019-12-18 23:31:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1200. [2019-12-18 23:31:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-12-18 23:31:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2789 transitions. [2019-12-18 23:31:44,725 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2789 transitions. Word has length 44 [2019-12-18 23:31:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:44,725 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 2789 transitions. [2019-12-18 23:31:44,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2789 transitions. [2019-12-18 23:31:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:44,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:44,728 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:44,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:44,929 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1525850638, now seen corresponding path program 11 times [2019-12-18 23:31:44,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:44,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564142580] [2019-12-18 23:31:44,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:45,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564142580] [2019-12-18 23:31:45,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111621384] [2019-12-18 23:31:45,103 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:31:45,156 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:31:45,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:45,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:45,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:45,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:45,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:45,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:45,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:45,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:45,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297376077] [2019-12-18 23:31:45,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:45,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:45,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:45,308 INFO L87 Difference]: Start difference. First operand 1200 states and 2789 transitions. Second operand 18 states. [2019-12-18 23:31:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:46,069 INFO L93 Difference]: Finished difference Result 2670 states and 5930 transitions. [2019-12-18 23:31:46,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:31:46,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:46,075 INFO L225 Difference]: With dead ends: 2670 [2019-12-18 23:31:46,075 INFO L226 Difference]: Without dead ends: 2398 [2019-12-18 23:31:46,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:31:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2019-12-18 23:31:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1248. [2019-12-18 23:31:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1248 states. [2019-12-18 23:31:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2902 transitions. [2019-12-18 23:31:46,108 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2902 transitions. Word has length 44 [2019-12-18 23:31:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:46,108 INFO L462 AbstractCegarLoop]: Abstraction has 1248 states and 2902 transitions. [2019-12-18 23:31:46,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2902 transitions. [2019-12-18 23:31:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:46,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:46,111 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:46,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:46,315 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1982844476, now seen corresponding path program 12 times [2019-12-18 23:31:46,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:46,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273127823] [2019-12-18 23:31:46,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:46,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273127823] [2019-12-18 23:31:46,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400731557] [2019-12-18 23:31:46,448 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 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 23:31:46,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:46,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:46,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:31:46,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:46,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:46,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:46,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-12-18 23:31:46,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070925405] [2019-12-18 23:31:46,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:31:46,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:31:46,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:31:46,647 INFO L87 Difference]: Start difference. First operand 1248 states and 2902 transitions. Second operand 19 states. [2019-12-18 23:31:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:47,113 INFO L93 Difference]: Finished difference Result 2365 states and 5257 transitions. [2019-12-18 23:31:47,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:31:47,114 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-12-18 23:31:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:47,116 INFO L225 Difference]: With dead ends: 2365 [2019-12-18 23:31:47,116 INFO L226 Difference]: Without dead ends: 2200 [2019-12-18 23:31:47,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2019-12-18 23:31:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2019-12-18 23:31:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1280. [2019-12-18 23:31:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-12-18 23:31:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2982 transitions. [2019-12-18 23:31:47,146 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2982 transitions. Word has length 44 [2019-12-18 23:31:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:47,146 INFO L462 AbstractCegarLoop]: Abstraction has 1280 states and 2982 transitions. [2019-12-18 23:31:47,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:31:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2982 transitions. [2019-12-18 23:31:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:47,148 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:47,149 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:47,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:47,352 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1731685888, now seen corresponding path program 4 times [2019-12-18 23:31:47,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:47,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644773984] [2019-12-18 23:31:47,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:47,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644773984] [2019-12-18 23:31:47,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84038070] [2019-12-18 23:31:47,508 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 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 23:31:47,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:47,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:47,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:47,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:47,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:47,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:47,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:47,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:47,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:47,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164264064] [2019-12-18 23:31:47,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:47,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:47,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:47,719 INFO L87 Difference]: Start difference. First operand 1280 states and 2982 transitions. Second operand 18 states. [2019-12-18 23:31:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:48,491 INFO L93 Difference]: Finished difference Result 2617 states and 5870 transitions. [2019-12-18 23:31:48,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:31:48,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:48,499 INFO L225 Difference]: With dead ends: 2617 [2019-12-18 23:31:48,499 INFO L226 Difference]: Without dead ends: 2287 [2019-12-18 23:31:48,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:31:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2019-12-18 23:31:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1368. [2019-12-18 23:31:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1368 states. [2019-12-18 23:31:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 3182 transitions. [2019-12-18 23:31:48,528 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 3182 transitions. Word has length 44 [2019-12-18 23:31:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:48,528 INFO L462 AbstractCegarLoop]: Abstraction has 1368 states and 3182 transitions. [2019-12-18 23:31:48,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 3182 transitions. [2019-12-18 23:31:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:48,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:48,531 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:48,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:48,735 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -592962072, now seen corresponding path program 2 times [2019-12-18 23:31:48,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:48,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862690378] [2019-12-18 23:31:48,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:48,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862690378] [2019-12-18 23:31:48,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633958416] [2019-12-18 23:31:48,887 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 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 23:31:48,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:48,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:48,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:48,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:49,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:49,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:49,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:49,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:49,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:49,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309772363] [2019-12-18 23:31:49,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:49,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:49,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:49,065 INFO L87 Difference]: Start difference. First operand 1368 states and 3182 transitions. Second operand 18 states. [2019-12-18 23:31:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:49,526 INFO L93 Difference]: Finished difference Result 2290 states and 5174 transitions. [2019-12-18 23:31:49,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:49,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:49,528 INFO L225 Difference]: With dead ends: 2290 [2019-12-18 23:31:49,529 INFO L226 Difference]: Without dead ends: 2083 [2019-12-18 23:31:49,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2019-12-18 23:31:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2019-12-18 23:31:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1431. [2019-12-18 23:31:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1431 states. [2019-12-18 23:31:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 3301 transitions. [2019-12-18 23:31:49,554 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 3301 transitions. Word has length 44 [2019-12-18 23:31:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:49,554 INFO L462 AbstractCegarLoop]: Abstraction has 1431 states and 3301 transitions. [2019-12-18 23:31:49,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 3301 transitions. [2019-12-18 23:31:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:49,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:49,557 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:49,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:49,760 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1039455820, now seen corresponding path program 13 times [2019-12-18 23:31:49,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:49,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626307363] [2019-12-18 23:31:49,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:49,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626307363] [2019-12-18 23:31:49,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319358571] [2019-12-18 23:31:49,900 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 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 23:31:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:49,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:49,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:50,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:50,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:50,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:50,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:50,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:50,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004515958] [2019-12-18 23:31:50,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:50,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:50,076 INFO L87 Difference]: Start difference. First operand 1431 states and 3301 transitions. Second operand 18 states. [2019-12-18 23:31:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:50,649 INFO L93 Difference]: Finished difference Result 2489 states and 5531 transitions. [2019-12-18 23:31:50,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:50,650 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:50,653 INFO L225 Difference]: With dead ends: 2489 [2019-12-18 23:31:50,653 INFO L226 Difference]: Without dead ends: 2324 [2019-12-18 23:31:50,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:31:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2019-12-18 23:31:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1449. [2019-12-18 23:31:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1449 states. [2019-12-18 23:31:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 3331 transitions. [2019-12-18 23:31:50,677 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 3331 transitions. Word has length 44 [2019-12-18 23:31:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:50,677 INFO L462 AbstractCegarLoop]: Abstraction has 1449 states and 3331 transitions. [2019-12-18 23:31:50,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 3331 transitions. [2019-12-18 23:31:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:50,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:50,680 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:50,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:50,883 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash -354704754, now seen corresponding path program 14 times [2019-12-18 23:31:50,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:50,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126694062] [2019-12-18 23:31:50,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:51,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126694062] [2019-12-18 23:31:51,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148593909] [2019-12-18 23:31:51,037 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 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 23:31:51,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:51,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:51,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:51,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:51,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:51,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:51,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:51,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:51,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:51,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237947479] [2019-12-18 23:31:51,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:51,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:51,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:51,404 INFO L87 Difference]: Start difference. First operand 1449 states and 3331 transitions. Second operand 18 states. [2019-12-18 23:31:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:53,073 INFO L93 Difference]: Finished difference Result 2694 states and 5933 transitions. [2019-12-18 23:31:53,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:53,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:53,077 INFO L225 Difference]: With dead ends: 2694 [2019-12-18 23:31:53,077 INFO L226 Difference]: Without dead ends: 2529 [2019-12-18 23:31:53,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=257, Invalid=931, Unknown=2, NotChecked=0, Total=1190 [2019-12-18 23:31:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2019-12-18 23:31:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1449. [2019-12-18 23:31:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1449 states. [2019-12-18 23:31:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 3331 transitions. [2019-12-18 23:31:53,100 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 3331 transitions. Word has length 44 [2019-12-18 23:31:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:53,101 INFO L462 AbstractCegarLoop]: Abstraction has 1449 states and 3331 transitions. [2019-12-18 23:31:53,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 3331 transitions. [2019-12-18 23:31:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:53,102 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:53,102 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:53,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:53,305 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:53,305 INFO L82 PathProgramCache]: Analyzing trace with hash 723714702, now seen corresponding path program 15 times [2019-12-18 23:31:53,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:53,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568313842] [2019-12-18 23:31:53,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:53,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568313842] [2019-12-18 23:31:53,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991350318] [2019-12-18 23:31:53,463 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 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 23:31:53,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:53,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:53,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:53,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:53,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:53,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:53,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:53,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:53,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:53,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343281523] [2019-12-18 23:31:53,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:53,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:53,636 INFO L87 Difference]: Start difference. First operand 1449 states and 3331 transitions. Second operand 18 states. [2019-12-18 23:31:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:54,275 INFO L93 Difference]: Finished difference Result 2787 states and 6168 transitions. [2019-12-18 23:31:54,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:31:54,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:54,279 INFO L225 Difference]: With dead ends: 2787 [2019-12-18 23:31:54,279 INFO L226 Difference]: Without dead ends: 2622 [2019-12-18 23:31:54,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 23:31:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2019-12-18 23:31:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1417. [2019-12-18 23:31:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1417 states. [2019-12-18 23:31:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 3251 transitions. [2019-12-18 23:31:54,302 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 3251 transitions. Word has length 44 [2019-12-18 23:31:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:54,302 INFO L462 AbstractCegarLoop]: Abstraction has 1417 states and 3251 transitions. [2019-12-18 23:31:54,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 3251 transitions. [2019-12-18 23:31:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:54,304 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:54,304 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:54,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:54,507 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash -998901656, now seen corresponding path program 16 times [2019-12-18 23:31:54,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:54,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098460136] [2019-12-18 23:31:54,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:54,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098460136] [2019-12-18 23:31:54,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371140804] [2019-12-18 23:31:54,648 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 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 23:31:54,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:54,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:54,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:54,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:54,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:54,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:54,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:54,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:54,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:54,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616894050] [2019-12-18 23:31:54,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:54,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:54,808 INFO L87 Difference]: Start difference. First operand 1417 states and 3251 transitions. Second operand 18 states. [2019-12-18 23:31:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:55,294 INFO L93 Difference]: Finished difference Result 2612 states and 5823 transitions. [2019-12-18 23:31:55,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:31:55,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:55,298 INFO L225 Difference]: With dead ends: 2612 [2019-12-18 23:31:55,298 INFO L226 Difference]: Without dead ends: 2447 [2019-12-18 23:31:55,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:31:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2019-12-18 23:31:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1385. [2019-12-18 23:31:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2019-12-18 23:31:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 3171 transitions. [2019-12-18 23:31:55,325 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 3171 transitions. Word has length 44 [2019-12-18 23:31:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:55,325 INFO L462 AbstractCegarLoop]: Abstraction has 1385 states and 3171 transitions. [2019-12-18 23:31:55,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 3171 transitions. [2019-12-18 23:31:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:55,327 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:55,327 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:55,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:55,531 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1581973769, now seen corresponding path program 17 times [2019-12-18 23:31:55,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:55,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140891790] [2019-12-18 23:31:55,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:55,692 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 23:31:55,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140891790] [2019-12-18 23:31:55,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803163320] [2019-12-18 23:31:55,692 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 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 23:31:55,742 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:31:55,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:55,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:31:55,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:56,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:56,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:56,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:56,900 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 23:31:56,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:56,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:31:56,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911451040] [2019-12-18 23:31:56,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:31:56,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:31:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:31:56,901 INFO L87 Difference]: Start difference. First operand 1385 states and 3171 transitions. Second operand 20 states. [2019-12-18 23:31:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:58,557 INFO L93 Difference]: Finished difference Result 2781 states and 6111 transitions. [2019-12-18 23:31:58,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:31:58,558 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:31:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:58,562 INFO L225 Difference]: With dead ends: 2781 [2019-12-18 23:31:58,562 INFO L226 Difference]: Without dead ends: 2616 [2019-12-18 23:31:58,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=287, Invalid=1043, Unknown=2, NotChecked=0, Total=1332 [2019-12-18 23:31:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2019-12-18 23:31:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1433. [2019-12-18 23:31:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2019-12-18 23:31:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3291 transitions. [2019-12-18 23:31:58,587 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3291 transitions. Word has length 48 [2019-12-18 23:31:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:58,587 INFO L462 AbstractCegarLoop]: Abstraction has 1433 states and 3291 transitions. [2019-12-18 23:31:58,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:31:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3291 transitions. [2019-12-18 23:31:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:58,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:58,590 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:58,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:58,793 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 917083741, now seen corresponding path program 18 times [2019-12-18 23:31:58,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:58,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728610588] [2019-12-18 23:31:58,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:58,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728610588] [2019-12-18 23:31:58,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760649313] [2019-12-18 23:31:58,967 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 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 23:31:59,014 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:31:59,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:59,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:31:59,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:01,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:01,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:01,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:01,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:01,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:01,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277244581] [2019-12-18 23:32:01,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:01,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=297, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:32:01,841 INFO L87 Difference]: Start difference. First operand 1433 states and 3291 transitions. Second operand 20 states. [2019-12-18 23:32:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:07,206 INFO L93 Difference]: Finished difference Result 2870 states and 6293 transitions. [2019-12-18 23:32:07,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:32:07,207 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:07,210 INFO L225 Difference]: With dead ends: 2870 [2019-12-18 23:32:07,211 INFO L226 Difference]: Without dead ends: 2705 [2019-12-18 23:32:07,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=302, Invalid=1096, Unknown=8, NotChecked=0, Total=1406 [2019-12-18 23:32:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2019-12-18 23:32:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1449. [2019-12-18 23:32:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1449 states. [2019-12-18 23:32:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 3331 transitions. [2019-12-18 23:32:07,240 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 3331 transitions. Word has length 48 [2019-12-18 23:32:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:07,240 INFO L462 AbstractCegarLoop]: Abstraction has 1449 states and 3331 transitions. [2019-12-18 23:32:07,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 3331 transitions. [2019-12-18 23:32:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:07,242 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:07,243 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:07,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:07,447 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash -805532617, now seen corresponding path program 19 times [2019-12-18 23:32:07,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:07,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013750954] [2019-12-18 23:32:07,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:07,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013750954] [2019-12-18 23:32:07,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176617910] [2019-12-18 23:32:07,716 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:32:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:07,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:07,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:10,979 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_87 Int)) (and (<= c_~j~0 (+ c_~i~0 (* 2 v_~j~0_87) 1)) (<= (div (+ (* v_~j~0_87 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 3 v_~j~0_87) 2)))) is different from true [2019-12-18 23:32:10,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:10,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:10,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:10,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:10,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:10,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609281708] [2019-12-18 23:32:10,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:10,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=4, NotChecked=34, Total=380 [2019-12-18 23:32:10,992 INFO L87 Difference]: Start difference. First operand 1449 states and 3331 transitions. Second operand 20 states. [2019-12-18 23:32:12,173 WARN L192 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-18 23:32:13,978 WARN L192 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2019-12-18 23:32:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:16,674 INFO L93 Difference]: Finished difference Result 2556 states and 5637 transitions. [2019-12-18 23:32:16,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:32:16,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:16,677 INFO L225 Difference]: With dead ends: 2556 [2019-12-18 23:32:16,677 INFO L226 Difference]: Without dead ends: 2449 [2019-12-18 23:32:16,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=311, Invalid=1020, Unknown=5, NotChecked=70, Total=1406 [2019-12-18 23:32:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2019-12-18 23:32:16,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1482. [2019-12-18 23:32:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2019-12-18 23:32:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 3414 transitions. [2019-12-18 23:32:16,705 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 3414 transitions. Word has length 48 [2019-12-18 23:32:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:16,706 INFO L462 AbstractCegarLoop]: Abstraction has 1482 states and 3414 transitions. [2019-12-18 23:32:16,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 3414 transitions. [2019-12-18 23:32:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:16,708 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:16,709 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:16,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:16,912 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1076010103, now seen corresponding path program 20 times [2019-12-18 23:32:16,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:16,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170746253] [2019-12-18 23:32:16,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:17,170 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 23:32:17,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170746253] [2019-12-18 23:32:17,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055093595] [2019-12-18 23:32:17,171 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 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 23:32:17,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:32:17,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:17,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:17,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:17,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:17,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:17,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:17,546 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 23:32:17,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:17,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:17,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703342650] [2019-12-18 23:32:17,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:17,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:17,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:17,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:17,549 INFO L87 Difference]: Start difference. First operand 1482 states and 3414 transitions. Second operand 20 states. [2019-12-18 23:32:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:18,489 INFO L93 Difference]: Finished difference Result 2883 states and 6316 transitions. [2019-12-18 23:32:18,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:32:18,490 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:18,493 INFO L225 Difference]: With dead ends: 2883 [2019-12-18 23:32:18,493 INFO L226 Difference]: Without dead ends: 2718 [2019-12-18 23:32:18,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:32:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2019-12-18 23:32:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 1498. [2019-12-18 23:32:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1498 states. [2019-12-18 23:32:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 3454 transitions. [2019-12-18 23:32:18,523 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 3454 transitions. Word has length 48 [2019-12-18 23:32:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:18,523 INFO L462 AbstractCegarLoop]: Abstraction has 1498 states and 3454 transitions. [2019-12-18 23:32:18,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 3454 transitions. [2019-12-18 23:32:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:18,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:18,526 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:18,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:18,729 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash -646606255, now seen corresponding path program 21 times [2019-12-18 23:32:18,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:18,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024731136] [2019-12-18 23:32:18,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:18,880 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 23:32:18,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024731136] [2019-12-18 23:32:18,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173913562] [2019-12-18 23:32:18,881 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 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 23:32:18,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:32:18,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:18,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:18,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:19,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:19,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:19,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:19,191 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 23:32:19,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:19,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:19,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966367983] [2019-12-18 23:32:19,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:19,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:19,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:19,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:19,193 INFO L87 Difference]: Start difference. First operand 1498 states and 3454 transitions. Second operand 20 states. [2019-12-18 23:32:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:20,546 INFO L93 Difference]: Finished difference Result 3076 states and 6731 transitions. [2019-12-18 23:32:20,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:32:20,546 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:20,551 INFO L225 Difference]: With dead ends: 3076 [2019-12-18 23:32:20,551 INFO L226 Difference]: Without dead ends: 2911 [2019-12-18 23:32:20,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:32:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-12-18 23:32:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1530. [2019-12-18 23:32:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1530 states. [2019-12-18 23:32:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 3534 transitions. [2019-12-18 23:32:20,600 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 3534 transitions. Word has length 48 [2019-12-18 23:32:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:20,600 INFO L462 AbstractCegarLoop]: Abstraction has 1530 states and 3534 transitions. [2019-12-18 23:32:20,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 3534 transitions. [2019-12-18 23:32:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:20,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:20,605 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:20,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:20,809 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash 611119697, now seen corresponding path program 22 times [2019-12-18 23:32:20,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:20,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424299920] [2019-12-18 23:32:20,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:20,997 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 23:32:20,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424299920] [2019-12-18 23:32:20,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494510239] [2019-12-18 23:32:20,997 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 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 23:32:21,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:32:21,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:21,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:21,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:25,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:25,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:25,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:25,435 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 23:32:25,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:25,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:25,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525447519] [2019-12-18 23:32:25,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:25,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:25,437 INFO L87 Difference]: Start difference. First operand 1530 states and 3534 transitions. Second operand 20 states. [2019-12-18 23:32:32,182 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2019-12-18 23:32:36,264 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 23:32:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:38,797 INFO L93 Difference]: Finished difference Result 2863 states and 6329 transitions. [2019-12-18 23:32:38,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:32:38,797 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:38,801 INFO L225 Difference]: With dead ends: 2863 [2019-12-18 23:32:38,801 INFO L226 Difference]: Without dead ends: 2698 [2019-12-18 23:32:38,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=326, Invalid=1155, Unknown=1, NotChecked=0, Total=1482 [2019-12-18 23:32:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2019-12-18 23:32:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1546. [2019-12-18 23:32:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2019-12-18 23:32:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3574 transitions. [2019-12-18 23:32:38,821 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3574 transitions. Word has length 48 [2019-12-18 23:32:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:38,821 INFO L462 AbstractCegarLoop]: Abstraction has 1546 states and 3574 transitions. [2019-12-18 23:32:38,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3574 transitions. [2019-12-18 23:32:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:38,823 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:38,823 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:39,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:39,027 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:39,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1184790089, now seen corresponding path program 23 times [2019-12-18 23:32:39,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:39,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232140756] [2019-12-18 23:32:39,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:39,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232140756] [2019-12-18 23:32:39,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149319504] [2019-12-18 23:32:39,257 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 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 23:32:39,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:32:39,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:39,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:39,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:39,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:39,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:39,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:39,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:39,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:39,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3034170] [2019-12-18 23:32:39,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:39,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:39,781 INFO L87 Difference]: Start difference. First operand 1546 states and 3574 transitions. Second operand 20 states. [2019-12-18 23:32:40,504 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2019-12-18 23:32:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:41,454 INFO L93 Difference]: Finished difference Result 2887 states and 6362 transitions. [2019-12-18 23:32:41,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:32:41,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:41,458 INFO L225 Difference]: With dead ends: 2887 [2019-12-18 23:32:41,458 INFO L226 Difference]: Without dead ends: 2722 [2019-12-18 23:32:41,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:32:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2019-12-18 23:32:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1514. [2019-12-18 23:32:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-12-18 23:32:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 3494 transitions. [2019-12-18 23:32:41,480 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 3494 transitions. Word has length 48 [2019-12-18 23:32:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:41,480 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 3494 transitions. [2019-12-18 23:32:41,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 3494 transitions. [2019-12-18 23:32:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:41,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:41,483 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:41,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:41,686 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:41,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1507693013, now seen corresponding path program 24 times [2019-12-18 23:32:41,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:41,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877081948] [2019-12-18 23:32:41,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:41,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877081948] [2019-12-18 23:32:41,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302067431] [2019-12-18 23:32:41,847 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 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 23:32:41,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-18 23:32:41,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:41,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:41,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:42,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:42,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:42,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:42,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:42,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:42,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032231320] [2019-12-18 23:32:42,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:42,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:42,047 INFO L87 Difference]: Start difference. First operand 1514 states and 3494 transitions. Second operand 20 states. [2019-12-18 23:32:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:42,732 INFO L93 Difference]: Finished difference Result 2688 states and 5979 transitions. [2019-12-18 23:32:42,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:32:42,733 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:42,735 INFO L225 Difference]: With dead ends: 2688 [2019-12-18 23:32:42,735 INFO L226 Difference]: Without dead ends: 2481 [2019-12-18 23:32:42,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:32:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2019-12-18 23:32:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1547. [2019-12-18 23:32:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1547 states. [2019-12-18 23:32:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 3556 transitions. [2019-12-18 23:32:42,756 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 3556 transitions. Word has length 48 [2019-12-18 23:32:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:42,757 INFO L462 AbstractCegarLoop]: Abstraction has 1547 states and 3556 transitions. [2019-12-18 23:32:42,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 3556 transitions. [2019-12-18 23:32:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:42,758 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:42,758 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:42,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:42,959 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1954186761, now seen corresponding path program 25 times [2019-12-18 23:32:42,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:42,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928906778] [2019-12-18 23:32:42,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:43,126 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 23:32:43,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928906778] [2019-12-18 23:32:43,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935890121] [2019-12-18 23:32:43,127 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 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 23:32:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:43,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:43,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:43,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:43,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:43,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:43,347 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 23:32:43,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:43,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:43,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953302152] [2019-12-18 23:32:43,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:43,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:43,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:43,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:43,349 INFO L87 Difference]: Start difference. First operand 1547 states and 3556 transitions. Second operand 20 states. [2019-12-18 23:32:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:44,107 INFO L93 Difference]: Finished difference Result 3069 states and 6746 transitions. [2019-12-18 23:32:44,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:32:44,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:44,110 INFO L225 Difference]: With dead ends: 3069 [2019-12-18 23:32:44,111 INFO L226 Difference]: Without dead ends: 2904 [2019-12-18 23:32:44,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:32:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2019-12-18 23:32:44,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1565. [2019-12-18 23:32:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2019-12-18 23:32:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 3619 transitions. [2019-12-18 23:32:44,134 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 3619 transitions. Word has length 48 [2019-12-18 23:32:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:44,134 INFO L462 AbstractCegarLoop]: Abstraction has 1565 states and 3619 transitions. [2019-12-18 23:32:44,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 3619 transitions. [2019-12-18 23:32:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:44,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:44,136 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:44,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:44,336 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash 526474091, now seen corresponding path program 26 times [2019-12-18 23:32:44,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:44,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015099472] [2019-12-18 23:32:44,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:44,523 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 23:32:44,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015099472] [2019-12-18 23:32:44,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142717800] [2019-12-18 23:32:44,524 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 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 23:32:44,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:32:44,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:44,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:44,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:45,292 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 23:32:55,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:55,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:55,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:55,590 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 23:32:55,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:55,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:55,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426416002] [2019-12-18 23:32:55,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:55,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:55,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=298, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:32:55,592 INFO L87 Difference]: Start difference. First operand 1565 states and 3619 transitions. Second operand 20 states. [2019-12-18 23:32:56,692 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2019-12-18 23:32:59,231 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 23:32:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:59,648 INFO L93 Difference]: Finished difference Result 3201 states and 7046 transitions. [2019-12-18 23:32:59,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:32:59,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:59,653 INFO L225 Difference]: With dead ends: 3201 [2019-12-18 23:32:59,653 INFO L226 Difference]: Without dead ends: 3036 [2019-12-18 23:32:59,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=376, Invalid=1344, Unknown=2, NotChecked=0, Total=1722 [2019-12-18 23:32:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2019-12-18 23:32:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 1597. [2019-12-18 23:32:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1597 states. [2019-12-18 23:32:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 3699 transitions. [2019-12-18 23:32:59,675 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 3699 transitions. Word has length 48 [2019-12-18 23:32:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:59,675 INFO L462 AbstractCegarLoop]: Abstraction has 1597 states and 3699 transitions. [2019-12-18 23:32:59,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 3699 transitions. [2019-12-18 23:32:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:59,677 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:59,677 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:59,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:59,879 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1269435695, now seen corresponding path program 27 times [2019-12-18 23:32:59,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:59,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999915840] [2019-12-18 23:32:59,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:00,074 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 23:33:00,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999915840] [2019-12-18 23:33:00,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358892404] [2019-12-18 23:33:00,074 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 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 23:33:00,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:33:00,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:00,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:00,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:01,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:01,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:01,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:01,547 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 23:33:01,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:01,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:01,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235325221] [2019-12-18 23:33:01,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:01,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:01,549 INFO L87 Difference]: Start difference. First operand 1597 states and 3699 transitions. Second operand 20 states. [2019-12-18 23:33:04,290 WARN L192 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-18 23:33:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:05,794 INFO L93 Difference]: Finished difference Result 3142 states and 6921 transitions. [2019-12-18 23:33:05,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:33:05,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:05,799 INFO L225 Difference]: With dead ends: 3142 [2019-12-18 23:33:05,800 INFO L226 Difference]: Without dead ends: 2977 [2019-12-18 23:33:05,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=346, Invalid=1290, Unknown=4, NotChecked=0, Total=1640 [2019-12-18 23:33:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2019-12-18 23:33:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1597. [2019-12-18 23:33:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1597 states. [2019-12-18 23:33:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 3699 transitions. [2019-12-18 23:33:05,839 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 3699 transitions. Word has length 48 [2019-12-18 23:33:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:05,840 INFO L462 AbstractCegarLoop]: Abstraction has 1597 states and 3699 transitions. [2019-12-18 23:33:05,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 3699 transitions. [2019-12-18 23:33:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:05,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:05,843 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:06,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:06,047 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1302915243, now seen corresponding path program 28 times [2019-12-18 23:33:06,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:06,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006764256] [2019-12-18 23:33:06,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:06,228 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 23:33:06,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006764256] [2019-12-18 23:33:06,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027053943] [2019-12-18 23:33:06,229 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 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 23:33:06,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:06,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:06,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:06,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:08,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:08,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:08,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:08,036 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 23:33:08,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:08,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:08,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700891343] [2019-12-18 23:33:08,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:08,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=297, Unknown=2, NotChecked=0, Total=380 [2019-12-18 23:33:08,037 INFO L87 Difference]: Start difference. First operand 1597 states and 3699 transitions. Second operand 20 states. [2019-12-18 23:33:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:09,034 INFO L93 Difference]: Finished difference Result 3198 states and 7041 transitions. [2019-12-18 23:33:09,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:09,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:09,038 INFO L225 Difference]: With dead ends: 3198 [2019-12-18 23:33:09,038 INFO L226 Difference]: Without dead ends: 3033 [2019-12-18 23:33:09,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=379, Invalid=1341, Unknown=2, NotChecked=0, Total=1722 [2019-12-18 23:33:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2019-12-18 23:33:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 1593. [2019-12-18 23:33:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2019-12-18 23:33:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 3686 transitions. [2019-12-18 23:33:09,060 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 3686 transitions. Word has length 48 [2019-12-18 23:33:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:09,060 INFO L462 AbstractCegarLoop]: Abstraction has 1593 states and 3686 transitions. [2019-12-18 23:33:09,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 3686 transitions. [2019-12-18 23:33:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:09,062 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:09,062 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:09,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:09,263 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1604893547, now seen corresponding path program 29 times [2019-12-18 23:33:09,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:09,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157558880] [2019-12-18 23:33:09,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:09,432 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 23:33:09,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157558880] [2019-12-18 23:33:09,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053854516] [2019-12-18 23:33:09,433 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 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 23:33:09,481 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:33:09,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:09,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:09,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:09,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:09,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:09,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:09,639 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 23:33:09,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:09,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:09,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683692854] [2019-12-18 23:33:09,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:09,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:09,640 INFO L87 Difference]: Start difference. First operand 1593 states and 3686 transitions. Second operand 20 states. [2019-12-18 23:33:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:10,666 INFO L93 Difference]: Finished difference Result 3460 states and 7571 transitions. [2019-12-18 23:33:10,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:33:10,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:10,670 INFO L225 Difference]: With dead ends: 3460 [2019-12-18 23:33:10,670 INFO L226 Difference]: Without dead ends: 3295 [2019-12-18 23:33:10,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1695, Unknown=0, NotChecked=0, Total=2162 [2019-12-18 23:33:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2019-12-18 23:33:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 1689. [2019-12-18 23:33:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2019-12-18 23:33:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 3926 transitions. [2019-12-18 23:33:10,716 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 3926 transitions. Word has length 48 [2019-12-18 23:33:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:10,716 INFO L462 AbstractCegarLoop]: Abstraction has 1689 states and 3926 transitions. [2019-12-18 23:33:10,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 3926 transitions. [2019-12-18 23:33:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:10,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:10,719 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:10,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:10,922 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash -191016239, now seen corresponding path program 30 times [2019-12-18 23:33:10,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:10,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185786770] [2019-12-18 23:33:10,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:11,117 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 23:33:11,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185786770] [2019-12-18 23:33:11,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464712253] [2019-12-18 23:33:11,118 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 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 23:33:11,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:33:11,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:11,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:11,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:11,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:11,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:11,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:11,316 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 23:33:11,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:11,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684352454] [2019-12-18 23:33:11,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:11,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:11,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:11,317 INFO L87 Difference]: Start difference. First operand 1689 states and 3926 transitions. Second operand 20 states. [2019-12-18 23:33:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:12,319 INFO L93 Difference]: Finished difference Result 3432 states and 7551 transitions. [2019-12-18 23:33:12,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-18 23:33:12,320 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:12,324 INFO L225 Difference]: With dead ends: 3432 [2019-12-18 23:33:12,324 INFO L226 Difference]: Without dead ends: 3267 [2019-12-18 23:33:12,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=485, Invalid=1771, Unknown=0, NotChecked=0, Total=2256 [2019-12-18 23:33:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2019-12-18 23:33:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1673. [2019-12-18 23:33:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1673 states. [2019-12-18 23:33:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 3886 transitions. [2019-12-18 23:33:12,357 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 3886 transitions. Word has length 48 [2019-12-18 23:33:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:12,358 INFO L462 AbstractCegarLoop]: Abstraction has 1673 states and 3886 transitions. [2019-12-18 23:33:12,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 3886 transitions. [2019-12-18 23:33:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:12,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:12,360 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:12,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:12,564 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:12,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1913632597, now seen corresponding path program 31 times [2019-12-18 23:33:12,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:12,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198625019] [2019-12-18 23:33:12,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:12,714 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 23:33:12,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198625019] [2019-12-18 23:33:12,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414395902] [2019-12-18 23:33:12,715 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 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 23:33:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:12,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:12,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:12,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:12,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:12,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:12,923 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 23:33:12,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:12,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:12,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82714105] [2019-12-18 23:33:12,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:12,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:12,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:12,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:12,924 INFO L87 Difference]: Start difference. First operand 1673 states and 3886 transitions. Second operand 20 states. [2019-12-18 23:33:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:13,727 INFO L93 Difference]: Finished difference Result 3292 states and 7291 transitions. [2019-12-18 23:33:13,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:13,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:13,731 INFO L225 Difference]: With dead ends: 3292 [2019-12-18 23:33:13,732 INFO L226 Difference]: Without dead ends: 3127 [2019-12-18 23:33:13,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=1337, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:33:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2019-12-18 23:33:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 1592. [2019-12-18 23:33:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2019-12-18 23:33:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 3683 transitions. [2019-12-18 23:33:13,756 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 3683 transitions. Word has length 48 [2019-12-18 23:33:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:13,756 INFO L462 AbstractCegarLoop]: Abstraction has 1592 states and 3683 transitions. [2019-12-18 23:33:13,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 3683 transitions. [2019-12-18 23:33:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:13,758 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:13,758 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:13,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:13,959 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash -655906645, now seen corresponding path program 32 times [2019-12-18 23:33:13,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:13,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591322809] [2019-12-18 23:33:13,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:14,192 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 23:33:14,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591322809] [2019-12-18 23:33:14,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739880820] [2019-12-18 23:33:14,193 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:33:14,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:33:14,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:14,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:14,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:16,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:16,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:16,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:16,605 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 23:33:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:16,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:16,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195938559] [2019-12-18 23:33:16,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:16,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:33:16,606 INFO L87 Difference]: Start difference. First operand 1592 states and 3683 transitions. Second operand 20 states. [2019-12-18 23:33:18,410 WARN L192 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2019-12-18 23:33:19,662 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-18 23:33:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:20,012 INFO L93 Difference]: Finished difference Result 3407 states and 7435 transitions. [2019-12-18 23:33:20,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:33:20,012 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:20,017 INFO L225 Difference]: With dead ends: 3407 [2019-12-18 23:33:20,017 INFO L226 Difference]: Without dead ends: 3242 [2019-12-18 23:33:20,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=471, Invalid=1689, Unknown=2, NotChecked=0, Total=2162 [2019-12-18 23:33:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2019-12-18 23:33:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 1588. [2019-12-18 23:33:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2019-12-18 23:33:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 3670 transitions. [2019-12-18 23:33:20,039 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 3670 transitions. Word has length 48 [2019-12-18 23:33:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:20,039 INFO L462 AbstractCegarLoop]: Abstraction has 1588 states and 3670 transitions. [2019-12-18 23:33:20,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 3670 transitions. [2019-12-18 23:33:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:20,041 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:20,041 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:20,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:20,242 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1966471619, now seen corresponding path program 5 times [2019-12-18 23:33:20,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:20,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412774540] [2019-12-18 23:33:20,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:20,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412774540] [2019-12-18 23:33:20,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180723576] [2019-12-18 23:33:20,452 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 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 23:33:20,498 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-18 23:33:20,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:20,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:20,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:20,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:20,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:20,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:20,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:20,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:20,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657195014] [2019-12-18 23:33:20,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:20,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:20,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:20,642 INFO L87 Difference]: Start difference. First operand 1588 states and 3670 transitions. Second operand 20 states. [2019-12-18 23:33:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:21,642 INFO L93 Difference]: Finished difference Result 3155 states and 7008 transitions. [2019-12-18 23:33:21,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-18 23:33:21,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:21,645 INFO L225 Difference]: With dead ends: 3155 [2019-12-18 23:33:21,646 INFO L226 Difference]: Without dead ends: 2825 [2019-12-18 23:33:21,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=466, Invalid=1790, Unknown=0, NotChecked=0, Total=2256 [2019-12-18 23:33:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2019-12-18 23:33:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1687. [2019-12-18 23:33:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2019-12-18 23:33:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 3875 transitions. [2019-12-18 23:33:21,677 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 3875 transitions. Word has length 48 [2019-12-18 23:33:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:21,677 INFO L462 AbstractCegarLoop]: Abstraction has 1687 states and 3875 transitions. [2019-12-18 23:33:21,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 3875 transitions. [2019-12-18 23:33:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:21,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:21,680 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:21,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:21,883 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1696420267, now seen corresponding path program 33 times [2019-12-18 23:33:21,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:21,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151019204] [2019-12-18 23:33:21,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:22,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151019204] [2019-12-18 23:33:22,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906169979] [2019-12-18 23:33:22,081 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 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 23:33:22,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:33:22,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:22,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:22,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:22,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:22,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:22,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:22,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:22,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:22,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282072124] [2019-12-18 23:33:22,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:22,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:22,463 INFO L87 Difference]: Start difference. First operand 1687 states and 3875 transitions. Second operand 20 states. [2019-12-18 23:33:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:23,163 INFO L93 Difference]: Finished difference Result 2901 states and 6431 transitions. [2019-12-18 23:33:23,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:33:23,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:23,168 INFO L225 Difference]: With dead ends: 2901 [2019-12-18 23:33:23,168 INFO L226 Difference]: Without dead ends: 2736 [2019-12-18 23:33:23,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:33:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2019-12-18 23:33:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 1705. [2019-12-18 23:33:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2019-12-18 23:33:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 3905 transitions. [2019-12-18 23:33:23,188 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 3905 transitions. Word has length 48 [2019-12-18 23:33:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:23,188 INFO L462 AbstractCegarLoop]: Abstraction has 1705 states and 3905 transitions. [2019-12-18 23:33:23,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 3905 transitions. [2019-12-18 23:33:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:23,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:23,190 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:23,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:23,392 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash -26196091, now seen corresponding path program 34 times [2019-12-18 23:33:23,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:23,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255194554] [2019-12-18 23:33:23,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:23,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255194554] [2019-12-18 23:33:23,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554541415] [2019-12-18 23:33:23,547 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 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 23:33:23,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:23,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:23,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:23,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:25,059 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 23:33:25,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:25,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:25,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:25,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:25,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:25,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812534099] [2019-12-18 23:33:25,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:25,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=300, Unknown=3, NotChecked=0, Total=380 [2019-12-18 23:33:25,863 INFO L87 Difference]: Start difference. First operand 1705 states and 3905 transitions. Second operand 20 states. [2019-12-18 23:33:29,837 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 23:33:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:29,902 INFO L93 Difference]: Finished difference Result 3118 states and 6846 transitions. [2019-12-18 23:33:29,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:33:29,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:29,907 INFO L225 Difference]: With dead ends: 3118 [2019-12-18 23:33:29,907 INFO L226 Difference]: Without dead ends: 2953 [2019-12-18 23:33:29,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=274, Invalid=1054, Unknown=4, NotChecked=0, Total=1332 [2019-12-18 23:33:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2019-12-18 23:33:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1701. [2019-12-18 23:33:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2019-12-18 23:33:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3892 transitions. [2019-12-18 23:33:29,929 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3892 transitions. Word has length 48 [2019-12-18 23:33:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:29,929 INFO L462 AbstractCegarLoop]: Abstraction has 1701 states and 3892 transitions. [2019-12-18 23:33:29,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3892 transitions. [2019-12-18 23:33:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:29,931 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:29,931 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:30,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:30,132 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1863455569, now seen corresponding path program 35 times [2019-12-18 23:33:30,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:30,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812474112] [2019-12-18 23:33:30,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:30,366 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 23:33:30,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812474112] [2019-12-18 23:33:30,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244519033] [2019-12-18 23:33:30,366 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 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 23:33:30,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:33:30,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:30,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:30,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:30,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:30,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:30,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:30,844 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 23:33:30,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:30,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:30,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8515560] [2019-12-18 23:33:30,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:30,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:30,846 INFO L87 Difference]: Start difference. First operand 1701 states and 3892 transitions. Second operand 20 states. [2019-12-18 23:33:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:32,924 INFO L93 Difference]: Finished difference Result 3376 states and 7330 transitions. [2019-12-18 23:33:32,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:33:32,924 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:32,929 INFO L225 Difference]: With dead ends: 3376 [2019-12-18 23:33:32,929 INFO L226 Difference]: Without dead ends: 3211 [2019-12-18 23:33:32,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=362, Invalid=1358, Unknown=2, NotChecked=0, Total=1722 [2019-12-18 23:33:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2019-12-18 23:33:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 1685. [2019-12-18 23:33:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1685 states. [2019-12-18 23:33:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 3852 transitions. [2019-12-18 23:33:32,952 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 3852 transitions. Word has length 48 [2019-12-18 23:33:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:32,952 INFO L462 AbstractCegarLoop]: Abstraction has 1685 states and 3852 transitions. [2019-12-18 23:33:32,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 3852 transitions. [2019-12-18 23:33:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:32,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:32,954 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:33,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:33,157 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 277173445, now seen corresponding path program 36 times [2019-12-18 23:33:33,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:33,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180545152] [2019-12-18 23:33:33,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:33,306 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 23:33:33,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180545152] [2019-12-18 23:33:33,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245438385] [2019-12-18 23:33:33,307 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 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 23:33:33,354 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:33:33,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:33,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:33,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:33,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:33,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:33,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:33,517 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 23:33:33,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:33,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:33,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151488740] [2019-12-18 23:33:33,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:33,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:33,518 INFO L87 Difference]: Start difference. First operand 1685 states and 3852 transitions. Second operand 20 states. [2019-12-18 23:33:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:34,304 INFO L93 Difference]: Finished difference Result 3393 states and 7458 transitions. [2019-12-18 23:33:34,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:34,305 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:34,308 INFO L225 Difference]: With dead ends: 3393 [2019-12-18 23:33:34,309 INFO L226 Difference]: Without dead ends: 3228 [2019-12-18 23:33:34,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=396, Invalid=1410, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:33:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2019-12-18 23:33:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 1717. [2019-12-18 23:33:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2019-12-18 23:33:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3932 transitions. [2019-12-18 23:33:34,334 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3932 transitions. Word has length 48 [2019-12-18 23:33:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:34,334 INFO L462 AbstractCegarLoop]: Abstraction has 1717 states and 3932 transitions. [2019-12-18 23:33:34,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3932 transitions. [2019-12-18 23:33:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:34,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:34,336 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:34,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:34,538 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1518736341, now seen corresponding path program 37 times [2019-12-18 23:33:34,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:34,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046235158] [2019-12-18 23:33:34,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:34,695 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 23:33:34,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046235158] [2019-12-18 23:33:34,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977130403] [2019-12-18 23:33:34,696 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 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 23:33:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:34,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:34,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:34,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:34,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:34,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:34,921 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 23:33:34,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:34,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:34,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599218483] [2019-12-18 23:33:34,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:34,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:34,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:34,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:34,923 INFO L87 Difference]: Start difference. First operand 1717 states and 3932 transitions. Second operand 20 states. [2019-12-18 23:33:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:35,665 INFO L93 Difference]: Finished difference Result 3529 states and 7778 transitions. [2019-12-18 23:33:35,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:33:35,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:35,670 INFO L225 Difference]: With dead ends: 3529 [2019-12-18 23:33:35,671 INFO L226 Difference]: Without dead ends: 3364 [2019-12-18 23:33:35,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:33:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2019-12-18 23:33:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1701. [2019-12-18 23:33:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2019-12-18 23:33:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3892 transitions. [2019-12-18 23:33:35,703 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3892 transitions. Word has length 48 [2019-12-18 23:33:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:35,703 INFO L462 AbstractCegarLoop]: Abstraction has 1701 states and 3892 transitions. [2019-12-18 23:33:35,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3892 transitions. [2019-12-18 23:33:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:35,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:35,705 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:35,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:35,909 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1053614597, now seen corresponding path program 38 times [2019-12-18 23:33:35,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:35,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239896255] [2019-12-18 23:33:35,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:36,073 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 23:33:36,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239896255] [2019-12-18 23:33:36,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76198389] [2019-12-18 23:33:36,073 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 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 23:33:36,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:33:36,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:36,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:36,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:38,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:38,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:38,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:38,093 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 23:33:38,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:38,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:38,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663365396] [2019-12-18 23:33:38,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:38,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:38,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:38,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=295, Unknown=4, NotChecked=0, Total=380 [2019-12-18 23:33:38,094 INFO L87 Difference]: Start difference. First operand 1701 states and 3892 transitions. Second operand 20 states. [2019-12-18 23:33:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:49,614 INFO L93 Difference]: Finished difference Result 3457 states and 7618 transitions. [2019-12-18 23:33:49,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:33:49,615 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:49,619 INFO L225 Difference]: With dead ends: 3457 [2019-12-18 23:33:49,620 INFO L226 Difference]: Without dead ends: 3292 [2019-12-18 23:33:49,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=424, Invalid=1456, Unknown=12, NotChecked=0, Total=1892 [2019-12-18 23:33:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3292 states. [2019-12-18 23:33:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3292 to 1669. [2019-12-18 23:33:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2019-12-18 23:33:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3812 transitions. [2019-12-18 23:33:49,642 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3812 transitions. Word has length 48 [2019-12-18 23:33:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:49,643 INFO L462 AbstractCegarLoop]: Abstraction has 1669 states and 3812 transitions. [2019-12-18 23:33:49,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3812 transitions. [2019-12-18 23:33:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:49,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:49,644 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:49,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:49,845 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash 909099153, now seen corresponding path program 39 times [2019-12-18 23:33:49,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:49,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576727486] [2019-12-18 23:33:49,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:50,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576727486] [2019-12-18 23:33:50,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190912112] [2019-12-18 23:33:50,011 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 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 23:33:50,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:33:50,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:50,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:50,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:51,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:51,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:51,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:51,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:51,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:51,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978346216] [2019-12-18 23:33:51,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:51,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=301, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:33:51,738 INFO L87 Difference]: Start difference. First operand 1669 states and 3812 transitions. Second operand 20 states. [2019-12-18 23:34:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:03,256 INFO L93 Difference]: Finished difference Result 3517 states and 7645 transitions. [2019-12-18 23:34:03,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:34:03,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:34:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:03,260 INFO L225 Difference]: With dead ends: 3517 [2019-12-18 23:34:03,260 INFO L226 Difference]: Without dead ends: 3352 [2019-12-18 23:34:03,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=469, Invalid=1688, Unknown=5, NotChecked=0, Total=2162 [2019-12-18 23:34:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2019-12-18 23:34:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 1637. [2019-12-18 23:34:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1637 states. [2019-12-18 23:34:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 3732 transitions. [2019-12-18 23:34:03,282 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 3732 transitions. Word has length 48 [2019-12-18 23:34:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:03,282 INFO L462 AbstractCegarLoop]: Abstraction has 1637 states and 3732 transitions. [2019-12-18 23:34:03,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:34:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 3732 transitions. [2019-12-18 23:34:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:03,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:03,284 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:03,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:03,487 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:03,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1833927724, now seen corresponding path program 40 times [2019-12-18 23:34:03,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:03,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160287127] [2019-12-18 23:34:03,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:03,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160287127] [2019-12-18 23:34:03,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590143272] [2019-12-18 23:34:03,724 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 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 23:34:03,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:34:03,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:03,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:03,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:05,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:05,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:05,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:05,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:05,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:05,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405246870] [2019-12-18 23:34:05,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:05,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=368, Unknown=1, NotChecked=0, Total=462 [2019-12-18 23:34:05,672 INFO L87 Difference]: Start difference. First operand 1637 states and 3732 transitions. Second operand 22 states. [2019-12-18 23:34:09,124 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-18 23:34:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:10,525 INFO L93 Difference]: Finished difference Result 3551 states and 7748 transitions. [2019-12-18 23:34:10,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:34:10,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:10,529 INFO L225 Difference]: With dead ends: 3551 [2019-12-18 23:34:10,530 INFO L226 Difference]: Without dead ends: 3386 [2019-12-18 23:34:10,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=397, Invalid=1491, Unknown=4, NotChecked=0, Total=1892 [2019-12-18 23:34:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2019-12-18 23:34:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 1689. [2019-12-18 23:34:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2019-12-18 23:34:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 3865 transitions. [2019-12-18 23:34:10,571 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 3865 transitions. Word has length 52 [2019-12-18 23:34:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:10,571 INFO L462 AbstractCegarLoop]: Abstraction has 1689 states and 3865 transitions. [2019-12-18 23:34:10,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 3865 transitions. [2019-12-18 23:34:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:10,573 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:10,573 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:10,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:10,774 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1057486572, now seen corresponding path program 41 times [2019-12-18 23:34:10,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:10,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209970390] [2019-12-18 23:34:10,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:11,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209970390] [2019-12-18 23:34:11,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323424609] [2019-12-18 23:34:11,057 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 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 23:34:11,129 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:34:11,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:11,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:11,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:15,337 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 23:34:18,281 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 23:34:18,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:18,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:18,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:18,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:18,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:18,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098378827] [2019-12-18 23:34:18,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:18,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=360, Unknown=3, NotChecked=0, Total=462 [2019-12-18 23:34:18,294 INFO L87 Difference]: Start difference. First operand 1689 states and 3865 transitions. Second operand 22 states. [2019-12-18 23:34:20,298 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2019-12-18 23:34:20,934 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2019-12-18 23:34:22,381 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-18 23:34:24,136 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2019-12-18 23:34:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:26,256 INFO L93 Difference]: Finished difference Result 3663 states and 7948 transitions. [2019-12-18 23:34:26,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:34:26,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:26,261 INFO L225 Difference]: With dead ends: 3663 [2019-12-18 23:34:26,261 INFO L226 Difference]: Without dead ends: 3498 [2019-12-18 23:34:26,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=386, Invalid=1412, Unknown=8, NotChecked=0, Total=1806 [2019-12-18 23:34:26,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2019-12-18 23:34:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 1753. [2019-12-18 23:34:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1753 states. [2019-12-18 23:34:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4025 transitions. [2019-12-18 23:34:26,286 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4025 transitions. Word has length 52 [2019-12-18 23:34:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:26,286 INFO L462 AbstractCegarLoop]: Abstraction has 1753 states and 4025 transitions. [2019-12-18 23:34:26,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4025 transitions. [2019-12-18 23:34:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:26,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:26,288 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:26,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:26,489 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 200239380, now seen corresponding path program 42 times [2019-12-18 23:34:26,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:26,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687503861] [2019-12-18 23:34:26,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:26,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687503861] [2019-12-18 23:34:26,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882498560] [2019-12-18 23:34:26,666 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 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 23:34:26,716 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:34:26,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:26,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:26,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:29,299 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_180 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_180) 1)) (<= (div (+ (* v_~j~0_180 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~j~0_180 (* 2 c_~j~0) 1)))) is different from true [2019-12-18 23:34:38,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:38,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:38,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-18 23:34:38,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:38,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:38,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389049537] [2019-12-18 23:34:38,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:38,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=322, Unknown=6, NotChecked=38, Total=462 [2019-12-18 23:34:38,449 INFO L87 Difference]: Start difference. First operand 1753 states and 4025 transitions. Second operand 22 states. [2019-12-18 23:34:49,668 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2019-12-18 23:35:18,870 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-12-18 23:35:25,041 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 23:35:26,413 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2019-12-18 23:35:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:35:27,577 INFO L93 Difference]: Finished difference Result 3510 states and 7692 transitions. [2019-12-18 23:35:27,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:35:27,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:35:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:35:27,583 INFO L225 Difference]: With dead ends: 3510 [2019-12-18 23:35:27,583 INFO L226 Difference]: Without dead ends: 3345 [2019-12-18 23:35:27,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=419, Invalid=1546, Unknown=19, NotChecked=86, Total=2070 [2019-12-18 23:35:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2019-12-18 23:35:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 1803. [2019-12-18 23:35:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2019-12-18 23:35:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4151 transitions. [2019-12-18 23:35:27,606 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4151 transitions. Word has length 52 [2019-12-18 23:35:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:35:27,606 INFO L462 AbstractCegarLoop]: Abstraction has 1803 states and 4151 transitions. [2019-12-18 23:35:27,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:35:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4151 transitions. [2019-12-18 23:35:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:35:27,608 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:35:27,608 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:35:27,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:27,809 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:35:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:35:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1237670150, now seen corresponding path program 6 times [2019-12-18 23:35:27,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:35:27,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291754200] [2019-12-18 23:35:27,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:35:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:28,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291754200] [2019-12-18 23:35:28,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247177324] [2019-12-18 23:35:28,087 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 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 23:35:28,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-18 23:35:28,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:35:28,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:35:28,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:35:31,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:31,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:31,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:31,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:35:31,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:35:31,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554544763] [2019-12-18 23:35:31,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:35:31,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:35:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:35:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=364, Unknown=2, NotChecked=0, Total=462 [2019-12-18 23:35:31,853 INFO L87 Difference]: Start difference. First operand 1803 states and 4151 transitions. Second operand 22 states. [2019-12-18 23:35:32,553 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2019-12-18 23:35:35,865 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-18 23:35:36,418 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-18 23:35:36,894 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 23:35:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:35:37,250 INFO L93 Difference]: Finished difference Result 3478 states and 7636 transitions. [2019-12-18 23:35:37,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:35:37,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:35:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:35:37,255 INFO L225 Difference]: With dead ends: 3478 [2019-12-18 23:35:37,256 INFO L226 Difference]: Without dead ends: 3313 [2019-12-18 23:35:37,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=475, Invalid=1778, Unknown=3, NotChecked=0, Total=2256 [2019-12-18 23:35:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2019-12-18 23:35:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 1782. [2019-12-18 23:35:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2019-12-18 23:35:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 4109 transitions. [2019-12-18 23:35:37,278 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 4109 transitions. Word has length 52 [2019-12-18 23:35:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:35:37,278 INFO L462 AbstractCegarLoop]: Abstraction has 1782 states and 4109 transitions. [2019-12-18 23:35:37,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:35:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 4109 transitions. [2019-12-18 23:35:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:35:37,280 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:35:37,280 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:35:37,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:37,481 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:35:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:35:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1142132178, now seen corresponding path program 43 times [2019-12-18 23:35:37,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:35:37,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241416360] [2019-12-18 23:35:37,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:35:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:37,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241416360] [2019-12-18 23:35:37,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636793988] [2019-12-18 23:35:37,651 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 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 23:35:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:37,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:35:37,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:35:37,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:37,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:37,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:38,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:35:38,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:35:38,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156739200] [2019-12-18 23:35:38,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:35:38,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:35:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:35:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:35:38,005 INFO L87 Difference]: Start difference. First operand 1782 states and 4109 transitions. Second operand 22 states. [2019-12-18 23:35:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:35:39,156 INFO L93 Difference]: Finished difference Result 3858 states and 8449 transitions. [2019-12-18 23:35:39,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:35:39,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:35:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:35:39,161 INFO L225 Difference]: With dead ends: 3858 [2019-12-18 23:35:39,161 INFO L226 Difference]: Without dead ends: 3693 [2019-12-18 23:35:39,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:35:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2019-12-18 23:35:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 1814. [2019-12-18 23:35:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2019-12-18 23:35:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4189 transitions. [2019-12-18 23:35:39,186 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4189 transitions. Word has length 52 [2019-12-18 23:35:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:35:39,186 INFO L462 AbstractCegarLoop]: Abstraction has 1814 states and 4189 transitions. [2019-12-18 23:35:39,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:35:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4189 transitions. [2019-12-18 23:35:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:35:39,188 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:35:39,188 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:35:39,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:39,389 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:35:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:35:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 115593774, now seen corresponding path program 44 times [2019-12-18 23:35:39,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:35:39,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530684230] [2019-12-18 23:35:39,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:35:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:39,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530684230] [2019-12-18 23:35:39,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458386343] [2019-12-18 23:35:39,574 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 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 23:35:39,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:35:39,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:35:39,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:35:39,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:35:44,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:44,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:44,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:44,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:35:44,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:35:44,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456942912] [2019-12-18 23:35:44,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:35:44,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:35:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:35:44,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:35:44,359 INFO L87 Difference]: Start difference. First operand 1814 states and 4189 transitions. Second operand 22 states. Received shutdown request... [2019-12-18 23:35:48,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 23:35:48,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:48,693 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 23:35:48,699 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 23:35:48,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:35:48 BasicIcfg [2019-12-18 23:35:48,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 23:35:48,701 INFO L168 Benchmark]: Toolchain (without parser) took 272061.65 ms. Allocated memory was 145.8 MB in the beginning and 422.6 MB in the end (delta: 276.8 MB). Free memory was 101.6 MB in the beginning and 113.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 265.1 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,701 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 827.94 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 101.2 MB in the beginning and 164.8 MB in the end (delta: -63.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.78 ms. Allocated memory is still 205.5 MB. Free memory was 164.8 MB in the beginning and 162.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,702 INFO L168 Benchmark]: Boogie Preprocessor took 28.31 ms. Allocated memory is still 205.5 MB. Free memory was 162.8 MB in the beginning and 160.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,702 INFO L168 Benchmark]: RCFGBuilder took 428.55 ms. Allocated memory is still 205.5 MB. Free memory was 160.8 MB in the beginning and 141.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,703 INFO L168 Benchmark]: TraceAbstraction took 270728.29 ms. Allocated memory was 205.5 MB in the beginning and 422.6 MB in the end (delta: 217.1 MB). Free memory was 141.0 MB in the beginning and 113.3 MB in the end (delta: 27.7 MB). Peak memory consumption was 244.7 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:48,705 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 827.94 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 101.2 MB in the beginning and 164.8 MB in the end (delta: -63.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.78 ms. Allocated memory is still 205.5 MB. Free memory was 164.8 MB in the beginning and 162.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.31 ms. Allocated memory is still 205.5 MB. Free memory was 162.8 MB in the beginning and 160.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.55 ms. Allocated memory is still 205.5 MB. Free memory was 160.8 MB in the beginning and 141.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 270728.29 ms. Allocated memory was 205.5 MB in the beginning and 422.6 MB in the end (delta: 217.1 MB). Free memory was 141.0 MB in the beginning and 113.3 MB in the end (delta: 27.7 MB). Peak memory consumption was 244.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (1814states) and FLOYD_HOARE automaton (currently 6 states, 22 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 270.6s, OverallIterations: 56, TraceHistogramMax: 7, AutomataDifference: 172.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4784 SDtfs, 50670 SDslu, 51126 SDs, 0 SdLazy, 9336 SolverSat, 3463 SolverUnsat, 65 SolverUnknown, 0 SolverNotchecked, 70.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3993 GetRequests, 2101 SyntacticMatches, 4 SemanticMatches, 1887 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 15655 ImplicationChecksByTransitivity, 173.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1814occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 55 MinimizatonAttempts, 59278 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 80.9s InterpolantComputationTime, 4916 NumberOfCodeBlocks, 4916 NumberOfCodeBlocksAsserted, 209 NumberOfCheckSat, 4806 ConstructedInterpolants, 146 QuantifiedInterpolants, 2540975 SizeOfPredicates, 216 NumberOfNonLiveVariables, 6432 ConjunctsInSsa, 722 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2154 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