/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-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:07:13,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:07:13,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:07:13,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:07:13,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:07:13,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:07:13,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:07:13,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:07:13,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:07:13,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:07:13,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:07:13,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:07:13,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:07:13,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:07:13,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:07:13,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:07:13,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:07:13,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:07:13,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:07:13,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:07:13,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:07:13,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:07:13,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:07:13,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:07:13,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:07:13,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:07:13,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:07:13,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:07:13,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:07:13,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:07:13,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:07:13,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:07:13,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:07:13,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:07:13,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:07:13,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:07:13,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:07:13,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:07:13,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:07:13,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:07:13,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:07:13,550 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-SemanticLbe-MCR.epf [2019-12-27 15:07:13,571 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:07:13,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:07:13,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:07:13,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:07:13,573 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:07:13,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:07:13,573 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:07:13,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:07:13,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:07:13,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:07:13,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:07:13,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:07:13,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:07:13,575 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:07:13,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:07:13,575 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:07:13,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:07:13,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:07:13,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:07:13,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:07:13,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:07:13,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:13,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:07:13,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:07:13,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:07:13,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:07:13,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:07:13,578 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:07:13,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:07:13,578 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:07:13,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:07:13,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:07:13,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:07:13,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:07:13,887 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:07:13,888 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:07:13,889 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-27 15:07:13,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/094d3fc82/24dfa799991042a48d602e738effd902/FLAGe87d0efb5 [2019-12-27 15:07:14,446 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:07:14,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-27 15:07:14,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/094d3fc82/24dfa799991042a48d602e738effd902/FLAGe87d0efb5 [2019-12-27 15:07:14,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/094d3fc82/24dfa799991042a48d602e738effd902 [2019-12-27 15:07:14,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:07:14,767 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:07:14,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:14,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:07:14,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:07:14,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:14" (1/1) ... [2019-12-27 15:07:14,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a34fe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:14, skipping insertion in model container [2019-12-27 15:07:14,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:14" (1/1) ... [2019-12-27 15:07:14,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:07:14,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:07:15,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:15,281 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:07:15,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:15,410 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:07:15,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15 WrapperNode [2019-12-27 15:07:15,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:15,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:15,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:07:15,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:07:15,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:15,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:07:15,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:07:15,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:07:15,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:07:15,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:07:15,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:07:15,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:07:15,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (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 [2019-12-27 15:07:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:07:15,542 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:07:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:07:15,543 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:07:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:07:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:07:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:07:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:07:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:07:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:07:15,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:07:15,545 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 15:07:15,907 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:07:15,907 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:07:15,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:15 BoogieIcfgContainer [2019-12-27 15:07:15,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:07:15,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:07:15,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:07:15,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:07:15,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:07:14" (1/3) ... [2019-12-27 15:07:15,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab0965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:15, skipping insertion in model container [2019-12-27 15:07:15,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15" (2/3) ... [2019-12-27 15:07:15,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab0965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:15, skipping insertion in model container [2019-12-27 15:07:15,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:15" (3/3) ... [2019-12-27 15:07:15,917 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2019-12-27 15:07:15,925 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:07:15,926 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:07:15,931 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:07:15,932 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:07:15,954 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,954 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,954 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,955 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,955 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,955 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,955 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,956 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,956 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,956 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,957 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,957 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,957 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,957 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,958 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,958 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,958 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,959 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,959 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,959 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,959 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,960 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,960 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,961 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,961 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,961 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,961 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,961 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,962 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,962 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,966 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,966 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,966 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,967 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,967 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,967 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,975 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,975 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,976 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,976 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,976 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,976 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:15,993 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:07:16,014 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:07:16,014 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:07:16,014 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:07:16,015 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:07:16,015 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:07:16,015 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:07:16,015 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:07:16,015 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:07:16,029 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 15:07:16,031 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:16,072 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:16,072 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:16,079 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:16,083 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:16,102 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:16,102 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:16,104 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:16,107 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 15:07:16,109 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:07:17,280 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 15:07:17,411 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-27 15:07:17,411 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 15:07:17,415 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:07:17,425 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:07:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:07:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:07:17,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,435 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:07:17,435 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-27 15:07:17,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925504755] [2019-12-27 15:07:17,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925504755] [2019-12-27 15:07:17,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:17,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:07:17,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1181249792] [2019-12-27 15:07:17,694 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,700 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,714 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:07:17,714 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,718 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:07:17,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:07:17,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:17,738 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:07:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,776 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 15:07:17,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:07:17,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:07:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,801 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:17,804 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:07:17,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:07:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:07:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:07:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 15:07:17,857 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 15:07:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,865 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 15:07:17,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:07:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 15:07:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:17,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,867 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,868 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-27 15:07:17,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097455509] [2019-12-27 15:07:17,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097455509] [2019-12-27 15:07:17,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:17,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:17,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1893778409] [2019-12-27 15:07:17,963 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,965 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,969 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:07:17,972 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,973 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:17,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:17,979 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 15:07:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,026 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-27 15:07:18,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:18,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,030 INFO L225 Difference]: With dead ends: 46 [2019-12-27 15:07:18,030 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 15:07:18,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 15:07:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-27 15:07:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 15:07:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-27 15:07:18,047 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-27 15:07:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,047 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-27 15:07:18,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-27 15:07:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:18,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,049 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,050 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-27 15:07:18,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591135775] [2019-12-27 15:07:18,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591135775] [2019-12-27 15:07:18,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:18,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:18,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1151589416] [2019-12-27 15:07:18,135 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,136 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,137 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 15:07:18,138 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,138 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:18,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:18,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:18,139 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-27 15:07:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,168 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 15:07:18,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:18,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,170 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:07:18,170 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:07:18,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:07:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 15:07:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 15:07:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 15:07:18,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 15:07:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,178 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 15:07:18,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 15:07:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:18,179 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,179 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,180 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-27 15:07:18,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390173959] [2019-12-27 15:07:18,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390173959] [2019-12-27 15:07:18,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366056167] [2019-12-27 15:07:18,283 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:18,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:18,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81645350] [2019-12-27 15:07:18,442 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,443 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,445 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 15:07:18,445 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,446 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:18,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:18,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:18,447 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 15:07:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,507 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-27 15:07:18,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:18,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,511 INFO L225 Difference]: With dead ends: 60 [2019-12-27 15:07:18,512 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 15:07:18,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 15:07:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-27 15:07:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 15:07:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-27 15:07:18,530 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-27 15:07:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,530 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-27 15:07:18,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-27 15:07:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:18,532 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,532 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,733 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-27 15:07:18,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182799788] [2019-12-27 15:07:18,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182799788] [2019-12-27 15:07:18,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941916127] [2019-12-27 15:07:18,809 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 [2019-12-27 15:07:18,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:18,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:18,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [460267024] [2019-12-27 15:07:18,921 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,924 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,925 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 15:07:18,925 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:18,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:18,927 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 5 states. [2019-12-27 15:07:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,985 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-27 15:07:18,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:18,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,988 INFO L225 Difference]: With dead ends: 61 [2019-12-27 15:07:18,989 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 15:07:18,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 15:07:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-27 15:07:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:07:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 15:07:18,997 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 15:07:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,997 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 15:07:18,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 15:07:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:18,998 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,998 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,199 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-27 15:07:19,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172284585] [2019-12-27 15:07:19,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172284585] [2019-12-27 15:07:19,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67286238] [2019-12-27 15:07:19,290 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:19,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:19,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:19,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261184243] [2019-12-27 15:07:19,398 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,399 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,402 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 15:07:19,402 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:19,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:19,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:19,404 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 15:07:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,516 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-27 15:07:19,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:19,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,520 INFO L225 Difference]: With dead ends: 72 [2019-12-27 15:07:19,520 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 15:07:19,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 15:07:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-27 15:07:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 15:07:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-27 15:07:19,534 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-27 15:07:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,534 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-27 15:07:19,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-27 15:07:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:19,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,536 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,737 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-27 15:07:19,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947618724] [2019-12-27 15:07:19,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947618724] [2019-12-27 15:07:19,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:19,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:19,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [484729645] [2019-12-27 15:07:19,797 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,798 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,799 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:07:19,799 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,800 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:19,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:19,801 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-27 15:07:19,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,855 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 15:07:19,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:19,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,857 INFO L225 Difference]: With dead ends: 70 [2019-12-27 15:07:19,857 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 15:07:19,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:07:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 15:07:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-27 15:07:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 15:07:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-27 15:07:19,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-27 15:07:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,865 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-27 15:07:19,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-27 15:07:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:19,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,867 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,867 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-27 15:07:19,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228940729] [2019-12-27 15:07:19,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228940729] [2019-12-27 15:07:19,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:19,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:19,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1093551864] [2019-12-27 15:07:19,914 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,915 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,917 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:07:19,917 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,919 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:19,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:19,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:19,921 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-27 15:07:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,958 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 15:07:19,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:19,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,960 INFO L225 Difference]: With dead ends: 70 [2019-12-27 15:07:19,961 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 15:07:19,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:07:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 15:07:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-27 15:07:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 15:07:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-27 15:07:19,975 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-27 15:07:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,975 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-27 15:07:19,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-27 15:07:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:19,976 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,976 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,977 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-27 15:07:19,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598892192] [2019-12-27 15:07:19,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598892192] [2019-12-27 15:07:20,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928626059] [2019-12-27 15:07:20,034 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:20,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:20,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [745828370] [2019-12-27 15:07:20,154 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,154 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,155 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 15:07:20,156 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,156 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:20,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:20,157 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 6 states. [2019-12-27 15:07:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,235 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-27 15:07:20,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:20,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,236 INFO L225 Difference]: With dead ends: 75 [2019-12-27 15:07:20,236 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 15:07:20,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 15:07:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-27 15:07:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 15:07:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 15:07:20,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 15:07:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,248 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 15:07:20,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 15:07:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:20,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,249 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,455 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-27 15:07:20,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335127705] [2019-12-27 15:07:20,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335127705] [2019-12-27 15:07:20,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599072629] [2019-12-27 15:07:20,528 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:20,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1992920128] [2019-12-27 15:07:20,645 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,646 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,649 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 15:07:20,649 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,650 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,651 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 15:07:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,769 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-27 15:07:20,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,770 INFO L225 Difference]: With dead ends: 86 [2019-12-27 15:07:20,771 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 15:07:20,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 15:07:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-27 15:07:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 15:07:20,777 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 15:07:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,777 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 15:07:20,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 15:07:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:20,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,778 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,982 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-27 15:07:20,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541477416] [2019-12-27 15:07:20,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541477416] [2019-12-27 15:07:21,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620071493] [2019-12-27 15:07:21,054 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:21,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:21,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [670831295] [2019-12-27 15:07:21,147 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 15:07:21,153 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,153 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:21,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:21,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:21,154 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 6 states. [2019-12-27 15:07:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,230 INFO L93 Difference]: Finished difference Result 85 states and 182 transitions. [2019-12-27 15:07:21,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:21,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,231 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:21,231 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:21,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2019-12-27 15:07:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 15:07:21,237 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 15:07:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,238 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 15:07:21,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 15:07:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:21,238 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,239 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,443 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-27 15:07:21,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720580415] [2019-12-27 15:07:21,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720580415] [2019-12-27 15:07:21,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785097992] [2019-12-27 15:07:21,500 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,544 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:21,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:21,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [764228111] [2019-12-27 15:07:21,607 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,608 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,610 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:21,610 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,610 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:21,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:21,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:21,612 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 6 states. [2019-12-27 15:07:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,677 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-27 15:07:21,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:21,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:21,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,678 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:21,678 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:21,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2019-12-27 15:07:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 15:07:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 15:07:21,684 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 15:07:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,685 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 15:07:21,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 15:07:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:21,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,686 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,893 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-27 15:07:21,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968673357] [2019-12-27 15:07:21,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968673357] [2019-12-27 15:07:21,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518437111] [2019-12-27 15:07:21,981 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,028 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:22,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:22,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [501021924] [2019-12-27 15:07:22,081 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,082 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,084 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:22,084 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,084 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:22,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:22,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:22,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:22,085 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 6 states. [2019-12-27 15:07:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,154 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2019-12-27 15:07:22,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:22,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,155 INFO L225 Difference]: With dead ends: 88 [2019-12-27 15:07:22,156 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 15:07:22,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 15:07:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2019-12-27 15:07:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 15:07:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2019-12-27 15:07:22,160 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 10 [2019-12-27 15:07:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,160 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2019-12-27 15:07:22,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2019-12-27 15:07:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:22,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,161 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,365 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1472519181, now seen corresponding path program 6 times [2019-12-27 15:07:22,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067199427] [2019-12-27 15:07:22,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067199427] [2019-12-27 15:07:22,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642705905] [2019-12-27 15:07:22,435 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:22,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:22,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [90646767] [2019-12-27 15:07:22,594 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,596 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,599 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 15:07:22,599 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,604 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:22,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:22,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:22,605 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 6 states. [2019-12-27 15:07:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,738 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2019-12-27 15:07:22,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:22,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,740 INFO L225 Difference]: With dead ends: 88 [2019-12-27 15:07:22,741 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 15:07:22,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 15:07:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2019-12-27 15:07:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 15:07:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 15:07:22,746 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 15:07:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,746 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 15:07:22,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 15:07:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:22,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,747 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,951 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 7 times [2019-12-27 15:07:22,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392534927] [2019-12-27 15:07:22,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392534927] [2019-12-27 15:07:23,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020505866] [2019-12-27 15:07:23,017 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:23,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1716539836] [2019-12-27 15:07:23,164 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,166 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,169 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:23,170 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,172 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:23,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:23,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:23,174 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 6 states. [2019-12-27 15:07:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,279 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-27 15:07:23,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:23,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,281 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:23,281 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:23,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2019-12-27 15:07:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 15:07:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2019-12-27 15:07:23,293 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 10 [2019-12-27 15:07:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,293 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2019-12-27 15:07:23,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2019-12-27 15:07:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:23,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,294 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,505 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516298, now seen corresponding path program 8 times [2019-12-27 15:07:23,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632261457] [2019-12-27 15:07:23,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632261457] [2019-12-27 15:07:23,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185368350] [2019-12-27 15:07:23,559 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:23,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:23,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1682040430] [2019-12-27 15:07:23,665 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,666 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,668 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:23,668 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,670 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:23,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:23,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:23,672 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 6 states. [2019-12-27 15:07:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,733 INFO L93 Difference]: Finished difference Result 86 states and 183 transitions. [2019-12-27 15:07:23,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:23,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,734 INFO L225 Difference]: With dead ends: 86 [2019-12-27 15:07:23,734 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 15:07:23,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 15:07:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-12-27 15:07:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 15:07:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-27 15:07:23,738 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-27 15:07:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,739 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-27 15:07:23,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-27 15:07:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:23,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,740 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,947 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-27 15:07:23,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662729341] [2019-12-27 15:07:23,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662729341] [2019-12-27 15:07:24,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548790664] [2019-12-27 15:07:24,009 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:24,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,058 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:24,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [168343482] [2019-12-27 15:07:24,122 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,123 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,123 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 15:07:24,123 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,124 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:24,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:24,125 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 7 states. [2019-12-27 15:07:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,255 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-27 15:07:24,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:24,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,257 INFO L225 Difference]: With dead ends: 90 [2019-12-27 15:07:24,257 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 15:07:24,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 15:07:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-27 15:07:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:07:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 15:07:24,261 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 15:07:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,261 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 15:07:24,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 15:07:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:24,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,262 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,466 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-27 15:07:24,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866055690] [2019-12-27 15:07:24,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866055690] [2019-12-27 15:07:24,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744115327] [2019-12-27 15:07:24,543 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,640 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:24,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:24,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764608927] [2019-12-27 15:07:24,732 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,733 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,735 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:24,735 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,735 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:24,736 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 15:07:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,863 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-27 15:07:24,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:24,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,865 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:24,865 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:24,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-27 15:07:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 15:07:24,870 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 15:07:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,870 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 15:07:24,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 15:07:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:24,871 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,871 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,079 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 9 times [2019-12-27 15:07:25,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577213113] [2019-12-27 15:07:25,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577213113] [2019-12-27 15:07:25,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695215008] [2019-12-27 15:07:25,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:25,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:25,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [861743445] [2019-12-27 15:07:25,285 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,286 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,287 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:25,288 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,288 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:25,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:25,289 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 15:07:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,398 INFO L93 Difference]: Finished difference Result 102 states and 219 transitions. [2019-12-27 15:07:25,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:25,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,399 INFO L225 Difference]: With dead ends: 102 [2019-12-27 15:07:25,399 INFO L226 Difference]: Without dead ends: 101 [2019-12-27 15:07:25,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-27 15:07:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2019-12-27 15:07:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 15:07:25,404 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 15:07:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,404 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 15:07:25,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 15:07:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:25,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,405 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,608 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 10 times [2019-12-27 15:07:25,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470421544] [2019-12-27 15:07:25,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470421544] [2019-12-27 15:07:25,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718493890] [2019-12-27 15:07:25,688 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:25,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:25,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [360974076] [2019-12-27 15:07:25,842 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,843 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,845 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:25,845 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,845 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:25,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:25,847 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 15:07:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,953 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2019-12-27 15:07:25,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:25,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,955 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:25,955 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:25,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 15:07:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 15:07:25,960 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 15:07:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,960 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 15:07:25,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 15:07:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:25,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,961 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:26,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,167 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:26,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 11 times [2019-12-27 15:07:26,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:26,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914511578] [2019-12-27 15:07:26,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914511578] [2019-12-27 15:07:26,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010242627] [2019-12-27 15:07:26,266 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:26,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:26,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:26,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:26,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1859172828] [2019-12-27 15:07:26,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:26,454 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:26,456 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:26,456 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:26,456 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:26,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:26,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:26,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:26,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:26,457 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 15:07:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:26,634 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2019-12-27 15:07:26,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:26,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:26,636 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:26,636 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:26,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 15:07:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 15:07:26,640 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 15:07:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:26,640 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 15:07:26,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 15:07:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:26,641 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:26,641 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:26,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,848 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash 26852098, now seen corresponding path program 12 times [2019-12-27 15:07:26,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:26,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79718676] [2019-12-27 15:07:26,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79718676] [2019-12-27 15:07:26,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89710316] [2019-12-27 15:07:26,912 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,953 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:26,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:26,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:27,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1939874090] [2019-12-27 15:07:27,039 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,040 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,042 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:27,042 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,042 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:27,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:27,043 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 15:07:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,138 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 15:07:27,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:27,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,140 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:27,140 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:27,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2019-12-27 15:07:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 15:07:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 15:07:27,144 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 15:07:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,144 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 15:07:27,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 15:07:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:27,145 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,145 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,349 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 13 times [2019-12-27 15:07:27,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228304221] [2019-12-27 15:07:27,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228304221] [2019-12-27 15:07:27,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937252540] [2019-12-27 15:07:27,418 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:27,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2074137507] [2019-12-27 15:07:27,535 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,536 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,539 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:27,540 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,540 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:27,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:27,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:27,541 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 15:07:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,655 INFO L93 Difference]: Finished difference Result 108 states and 231 transitions. [2019-12-27 15:07:27,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:27,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,656 INFO L225 Difference]: With dead ends: 108 [2019-12-27 15:07:27,657 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 15:07:27,657 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 15:07:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2019-12-27 15:07:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:07:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 15:07:27,661 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 15:07:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,662 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 15:07:27,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 15:07:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:27,662 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,663 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,866 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 14 times [2019-12-27 15:07:27,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477094395] [2019-12-27 15:07:27,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477094395] [2019-12-27 15:07:27,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850272645] [2019-12-27 15:07:27,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:27,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:28,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1700321232] [2019-12-27 15:07:28,059 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,059 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,061 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:28,061 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,062 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:28,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:28,063 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 15:07:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,173 INFO L93 Difference]: Finished difference Result 109 states and 235 transitions. [2019-12-27 15:07:28,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:28,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,174 INFO L225 Difference]: With dead ends: 109 [2019-12-27 15:07:28,174 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 15:07:28,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 15:07:28,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2019-12-27 15:07:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:07:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 15:07:28,180 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 15:07:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,181 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 15:07:28,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 15:07:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:28,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,183 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,387 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 15 times [2019-12-27 15:07:28,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246845107] [2019-12-27 15:07:28,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246845107] [2019-12-27 15:07:28,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446359346] [2019-12-27 15:07:28,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:28,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:28,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:28,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:28,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1583346390] [2019-12-27 15:07:28,582 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,583 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,585 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:28,585 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,585 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:28,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:28,586 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 15:07:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,695 INFO L93 Difference]: Finished difference Result 107 states and 230 transitions. [2019-12-27 15:07:28,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:28,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,697 INFO L225 Difference]: With dead ends: 107 [2019-12-27 15:07:28,697 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 15:07:28,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 15:07:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2019-12-27 15:07:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:07:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 15:07:28,701 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 15:07:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,701 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 15:07:28,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 15:07:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:28,703 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,703 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,904 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1596543068, now seen corresponding path program 16 times [2019-12-27 15:07:28,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374001479] [2019-12-27 15:07:28,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374001479] [2019-12-27 15:07:28,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368026313] [2019-12-27 15:07:28,984 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,032 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:29,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:29,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [365755669] [2019-12-27 15:07:29,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,121 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:29,122 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,124 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:29,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:29,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:29,125 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 15:07:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,237 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2019-12-27 15:07:29,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:29,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,238 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:29,238 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:29,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2019-12-27 15:07:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 15:07:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 15:07:29,242 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 15:07:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,242 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 15:07:29,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 15:07:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:29,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,243 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,447 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545858, now seen corresponding path program 17 times [2019-12-27 15:07:29,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551655238] [2019-12-27 15:07:29,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551655238] [2019-12-27 15:07:29,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348818392] [2019-12-27 15:07:29,500 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:29,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:29,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1161059577] [2019-12-27 15:07:29,656 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,657 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,658 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:29,658 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,659 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:29,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:29,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:29,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:29,660 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 15:07:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,837 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2019-12-27 15:07:29,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:29,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,839 INFO L225 Difference]: With dead ends: 111 [2019-12-27 15:07:29,839 INFO L226 Difference]: Without dead ends: 110 [2019-12-27 15:07:29,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-27 15:07:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2019-12-27 15:07:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:07:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 15:07:29,843 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 15:07:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,844 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 15:07:29,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 15:07:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:29,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,844 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,048 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545951, now seen corresponding path program 18 times [2019-12-27 15:07:30,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65243129] [2019-12-27 15:07:30,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65243129] [2019-12-27 15:07:30,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679871023] [2019-12-27 15:07:30,108 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,161 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:30,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:30,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [695809051] [2019-12-27 15:07:30,241 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,242 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,248 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:30,248 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,249 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:30,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:30,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:30,250 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 15:07:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,356 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2019-12-27 15:07:30,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:30,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,357 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:30,357 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:30,358 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2019-12-27 15:07:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 15:07:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-27 15:07:30,361 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-27 15:07:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,361 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-27 15:07:30,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-27 15:07:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:30,362 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,362 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,566 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632348, now seen corresponding path program 19 times [2019-12-27 15:07:30,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394622586] [2019-12-27 15:07:30,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394622586] [2019-12-27 15:07:30,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998707084] [2019-12-27 15:07:30,630 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:30,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [792596125] [2019-12-27 15:07:30,743 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,743 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,745 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:30,745 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,745 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:30,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:30,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:30,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:30,746 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,849 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 15:07:30,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:30,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,851 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:30,851 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:30,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-12-27 15:07:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:07:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 15:07:30,857 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 15:07:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,857 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 15:07:30,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 15:07:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:30,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,858 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,061 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 20 times [2019-12-27 15:07:31,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141924176] [2019-12-27 15:07:31,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141924176] [2019-12-27 15:07:31,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377897891] [2019-12-27 15:07:31,148 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:31,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:31,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [551474855] [2019-12-27 15:07:31,254 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,255 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,256 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:31,256 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,257 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:31,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:31,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:31,258 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 15:07:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,372 INFO L93 Difference]: Finished difference Result 110 states and 233 transitions. [2019-12-27 15:07:31,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:31,373 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,374 INFO L225 Difference]: With dead ends: 110 [2019-12-27 15:07:31,374 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 15:07:31,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 15:07:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-27 15:07:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 15:07:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 15:07:31,378 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 15:07:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,378 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 15:07:31,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 15:07:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:31,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,379 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,583 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1596635231, now seen corresponding path program 21 times [2019-12-27 15:07:31,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31918111] [2019-12-27 15:07:31,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31918111] [2019-12-27 15:07:31,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241802377] [2019-12-27 15:07:31,630 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:31,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:31,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2093206736] [2019-12-27 15:07:31,737 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,738 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:31,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,739 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:31,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:31,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:31,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:31,740 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 15:07:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,848 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 15:07:31,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:31,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,850 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:31,850 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:31,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-12-27 15:07:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:07:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 15:07:31,854 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 15:07:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,854 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 15:07:31,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 15:07:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:31,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,855 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,059 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1596635324, now seen corresponding path program 22 times [2019-12-27 15:07:32,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053936041] [2019-12-27 15:07:32,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053936041] [2019-12-27 15:07:32,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037178359] [2019-12-27 15:07:32,110 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 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 [2019-12-27 15:07:32,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:32,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:32,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1868349014] [2019-12-27 15:07:32,226 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,226 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,227 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:32,228 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,228 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:32,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:32,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:32,229 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 15:07:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,334 INFO L93 Difference]: Finished difference Result 103 states and 217 transitions. [2019-12-27 15:07:32,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:32,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,336 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:32,336 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:32,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2019-12-27 15:07:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 15:07:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-27 15:07:32,340 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-27 15:07:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,340 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-27 15:07:32,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-27 15:07:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:32,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,343 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,548 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-27 15:07:32,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422035511] [2019-12-27 15:07:32,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422035511] [2019-12-27 15:07:32,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370127691] [2019-12-27 15:07:32,608 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 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 [2019-12-27 15:07:32,662 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:32,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1139179255] [2019-12-27 15:07:32,792 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,793 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,795 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 15:07:32,795 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,796 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,798 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 8 states. [2019-12-27 15:07:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,968 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-27 15:07:32,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:32,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,970 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:32,970 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:32,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-27 15:07:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 15:07:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 15:07:32,975 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 15:07:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,975 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 15:07:32,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 15:07:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:32,976 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,977 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,181 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-27 15:07:33,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949446314] [2019-12-27 15:07:33,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949446314] [2019-12-27 15:07:33,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362747719] [2019-12-27 15:07:33,283 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 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 [2019-12-27 15:07:33,361 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:33,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:33,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:33,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [943773196] [2019-12-27 15:07:33,544 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,545 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,547 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 15:07:33,548 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,548 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:33,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:33,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:33,549 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 9 states. [2019-12-27 15:07:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,768 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-27 15:07:33,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:33,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,770 INFO L225 Difference]: With dead ends: 116 [2019-12-27 15:07:33,770 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 15:07:33,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 15:07:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-27 15:07:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 15:07:33,776 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 15:07:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,776 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 15:07:33,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 15:07:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,777 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,777 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,981 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 23 times [2019-12-27 15:07:33,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722484809] [2019-12-27 15:07:33,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722484809] [2019-12-27 15:07:34,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666631469] [2019-12-27 15:07:34,053 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,101 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:34,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [846194409] [2019-12-27 15:07:34,187 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,188 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,190 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 15:07:34,190 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,190 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,191 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 15:07:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,326 INFO L93 Difference]: Finished difference Result 120 states and 257 transitions. [2019-12-27 15:07:34,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,328 INFO L225 Difference]: With dead ends: 120 [2019-12-27 15:07:34,328 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 15:07:34,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 15:07:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2019-12-27 15:07:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 15:07:34,333 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 15:07:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,333 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 15:07:34,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 15:07:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,335 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,535 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 24 times [2019-12-27 15:07:34,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957198502] [2019-12-27 15:07:34,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957198502] [2019-12-27 15:07:34,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993089723] [2019-12-27 15:07:34,608 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,661 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:34,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1428329003] [2019-12-27 15:07:34,805 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,806 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,810 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:34,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,811 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,812 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 15:07:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,011 INFO L93 Difference]: Finished difference Result 125 states and 268 transitions. [2019-12-27 15:07:35,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,013 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:35,013 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:35,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 15:07:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 15:07:35,019 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 15:07:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,019 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 15:07:35,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 15:07:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,022 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,227 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 25 times [2019-12-27 15:07:35,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629433196] [2019-12-27 15:07:35,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629433196] [2019-12-27 15:07:35,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842162195] [2019-12-27 15:07:35,325 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [993809746] [2019-12-27 15:07:35,490 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,491 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,494 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:35,494 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,494 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:35,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,495 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 15:07:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,681 INFO L93 Difference]: Finished difference Result 125 states and 268 transitions. [2019-12-27 15:07:35,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,683 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:35,683 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:35,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 15:07:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 15:07:35,688 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 15:07:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,688 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 15:07:35,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 15:07:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,689 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,893 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 26 times [2019-12-27 15:07:35,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698556331] [2019-12-27 15:07:35,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698556331] [2019-12-27 15:07:35,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337748667] [2019-12-27 15:07:35,953 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:35,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1644199876] [2019-12-27 15:07:36,086 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,087 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,089 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:36,089 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,090 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:36,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,091 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 15:07:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:36,238 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2019-12-27 15:07:36,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:36,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:36,239 INFO L225 Difference]: With dead ends: 126 [2019-12-27 15:07:36,239 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 15:07:36,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 15:07:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2019-12-27 15:07:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 15:07:36,242 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 15:07:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:36,243 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 15:07:36,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 15:07:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:36,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:36,243 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,447 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 27 times [2019-12-27 15:07:36,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343964552] [2019-12-27 15:07:36,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343964552] [2019-12-27 15:07:36,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258217548] [2019-12-27 15:07:36,564 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:36,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1409257527] [2019-12-27 15:07:36,724 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:36,726 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,727 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:36,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,727 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 15:07:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:36,911 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 15:07:36,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:36,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:36,913 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:36,913 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:36,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2019-12-27 15:07:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 226 transitions. [2019-12-27 15:07:36,918 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 226 transitions. Word has length 12 [2019-12-27 15:07:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:36,918 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 226 transitions. [2019-12-27 15:07:36,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 226 transitions. [2019-12-27 15:07:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:36,919 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:36,919 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,122 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,123 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 28 times [2019-12-27 15:07:37,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80818896] [2019-12-27 15:07:37,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80818896] [2019-12-27 15:07:37,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243038094] [2019-12-27 15:07:37,199 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:37,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:37,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:37,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1796176036] [2019-12-27 15:07:37,369 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:37,370 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:37,372 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:37,372 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:37,372 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:37,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:37,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:37,373 INFO L87 Difference]: Start difference. First operand 99 states and 226 transitions. Second operand 8 states. [2019-12-27 15:07:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,569 INFO L93 Difference]: Finished difference Result 129 states and 275 transitions. [2019-12-27 15:07:37,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,569 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,571 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:37,571 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:37,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-27 15:07:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 226 transitions. [2019-12-27 15:07:37,576 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 226 transitions. Word has length 12 [2019-12-27 15:07:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,576 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 226 transitions. [2019-12-27 15:07:37,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 226 transitions. [2019-12-27 15:07:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,577 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,780 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 29 times [2019-12-27 15:07:37,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699944355] [2019-12-27 15:07:37,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699944355] [2019-12-27 15:07:37,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345069815] [2019-12-27 15:07:37,849 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:37,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1905576601] [2019-12-27 15:07:38,144 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,146 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,149 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:38,149 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,149 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:38,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,150 INFO L87 Difference]: Start difference. First operand 99 states and 226 transitions. Second operand 8 states. [2019-12-27 15:07:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,323 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 15:07:38,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,324 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:38,324 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:38,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2019-12-27 15:07:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 15:07:38,328 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 15:07:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,328 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 15:07:38,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 15:07:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,329 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,329 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,532 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash 832415251, now seen corresponding path program 30 times [2019-12-27 15:07:38,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63238994] [2019-12-27 15:07:38,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63238994] [2019-12-27 15:07:38,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121783821] [2019-12-27 15:07:38,597 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:38,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1016179197] [2019-12-27 15:07:38,756 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,757 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,758 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:38,758 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,759 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:38,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,759 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 15:07:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,875 INFO L93 Difference]: Finished difference Result 123 states and 260 transitions. [2019-12-27 15:07:38,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,876 INFO L225 Difference]: With dead ends: 123 [2019-12-27 15:07:38,876 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 15:07:38,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 15:07:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2019-12-27 15:07:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 15:07:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 15:07:38,878 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 15:07:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,879 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 15:07:38,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 15:07:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,879 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,080 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash 832415344, now seen corresponding path program 31 times [2019-12-27 15:07:39,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996868598] [2019-12-27 15:07:39,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996868598] [2019-12-27 15:07:39,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547273447] [2019-12-27 15:07:39,142 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1189035531] [2019-12-27 15:07:39,292 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,293 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,295 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:39,295 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,295 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:39,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,296 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,442 INFO L93 Difference]: Finished difference Result 129 states and 275 transitions. [2019-12-27 15:07:39,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,443 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:39,444 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:39,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:39,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2019-12-27 15:07:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 15:07:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 15:07:39,447 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 15:07:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,447 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 15:07:39,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 15:07:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,448 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,448 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,652 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 32 times [2019-12-27 15:07:39,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583132375] [2019-12-27 15:07:39,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583132375] [2019-12-27 15:07:39,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511413245] [2019-12-27 15:07:39,718 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:39,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [268040590] [2019-12-27 15:07:40,352 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,353 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,356 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,356 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,356 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:40,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2019-12-27 15:07:40,357 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 15:07:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,574 INFO L93 Difference]: Finished difference Result 131 states and 280 transitions. [2019-12-27 15:07:40,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:40,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,576 INFO L225 Difference]: With dead ends: 131 [2019-12-27 15:07:40,576 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 15:07:40,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:07:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 15:07:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2019-12-27 15:07:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 15:07:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 15:07:40,580 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 15:07:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,581 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 15:07:40,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 15:07:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,582 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,785 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 33 times [2019-12-27 15:07:40,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945792250] [2019-12-27 15:07:40,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945792250] [2019-12-27 15:07:40,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102098625] [2019-12-27 15:07:40,856 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:40,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:40,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1961549570] [2019-12-27 15:07:40,993 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,994 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,996 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,996 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,996 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:40,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:40,997 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 15:07:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,156 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2019-12-27 15:07:41,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,157 INFO L225 Difference]: With dead ends: 130 [2019-12-27 15:07:41,157 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 15:07:41,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 15:07:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2019-12-27 15:07:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:41,161 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,161 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:41,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,162 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,365 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 34 times [2019-12-27 15:07:41,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193074140] [2019-12-27 15:07:41,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193074140] [2019-12-27 15:07:41,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524999135] [2019-12-27 15:07:41,437 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:41,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:41,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:41,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1734796875] [2019-12-27 15:07:41,558 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,558 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,560 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,560 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,560 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:41,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,561 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,709 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2019-12-27 15:07:41,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,710 INFO L225 Difference]: With dead ends: 133 [2019-12-27 15:07:41,710 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 15:07:41,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 15:07:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2019-12-27 15:07:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:41,713 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,713 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:41,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,714 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,915 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 35 times [2019-12-27 15:07:41,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976710465] [2019-12-27 15:07:41,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976710465] [2019-12-27 15:07:41,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010965728] [2019-12-27 15:07:41,976 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,016 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:42,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [521567501] [2019-12-27 15:07:42,096 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,097 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,099 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,099 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,099 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:42,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,100 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,267 INFO L93 Difference]: Finished difference Result 130 states and 282 transitions. [2019-12-27 15:07:42,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,268 INFO L225 Difference]: With dead ends: 130 [2019-12-27 15:07:42,269 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 15:07:42,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 15:07:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2019-12-27 15:07:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 15:07:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 15:07:42,273 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 15:07:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,273 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 15:07:42,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 15:07:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,273 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,476 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 36 times [2019-12-27 15:07:42,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143304343] [2019-12-27 15:07:42,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143304343] [2019-12-27 15:07:42,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281864163] [2019-12-27 15:07:42,550 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:42,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [110068866] [2019-12-27 15:07:42,708 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,708 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,710 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,710 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,710 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:42,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,711 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 15:07:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,878 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2019-12-27 15:07:42,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,879 INFO L225 Difference]: With dead ends: 130 [2019-12-27 15:07:42,879 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 15:07:42,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 15:07:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2019-12-27 15:07:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 15:07:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 15:07:42,882 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 15:07:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,883 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 15:07:42,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 15:07:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,884 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,085 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,085 INFO L82 PathProgramCache]: Analyzing trace with hash 832507600, now seen corresponding path program 37 times [2019-12-27 15:07:43,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671962442] [2019-12-27 15:07:43,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671962442] [2019-12-27 15:07:43,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431405512] [2019-12-27 15:07:43,153 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [992331252] [2019-12-27 15:07:43,274 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,275 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,276 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:43,276 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,277 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:43,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,277 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 15:07:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,430 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 15:07:43,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:43,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,431 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:43,432 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:43,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2019-12-27 15:07:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:43,435 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,435 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:43,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:43,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,436 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,637 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2046775021, now seen corresponding path program 38 times [2019-12-27 15:07:43,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605658408] [2019-12-27 15:07:43,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605658408] [2019-12-27 15:07:43,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905164018] [2019-12-27 15:07:43,699 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:43,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2100963422] [2019-12-27 15:07:43,849 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 15:07:43,853 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,854 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:07:43,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,855 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,004 INFO L93 Difference]: Finished difference Result 124 states and 264 transitions. [2019-12-27 15:07:44,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:44,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,005 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:44,006 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:44,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2019-12-27 15:07:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 15:07:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 15:07:44,009 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 15:07:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,009 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 15:07:44,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 15:07:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:44,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,009 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,210 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2046772231, now seen corresponding path program 39 times [2019-12-27 15:07:44,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601467118] [2019-12-27 15:07:44,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601467118] [2019-12-27 15:07:44,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445036430] [2019-12-27 15:07:44,283 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:44,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:44,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1092494713] [2019-12-27 15:07:44,413 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,414 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,416 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:44,416 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,417 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:44,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:44,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:44,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:44,418 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,579 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-27 15:07:44,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:44,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,581 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:44,581 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:44,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2019-12-27 15:07:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:44,586 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,586 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:44,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:44,587 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,587 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,788 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2046772138, now seen corresponding path program 40 times [2019-12-27 15:07:44,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686926906] [2019-12-27 15:07:44,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686926906] [2019-12-27 15:07:44,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788353617] [2019-12-27 15:07:44,856 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,896 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:44,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:44,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [523882258] [2019-12-27 15:07:44,985 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,987 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,988 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:44,988 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,989 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:44,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:44,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:44,990 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,148 INFO L93 Difference]: Finished difference Result 127 states and 270 transitions. [2019-12-27 15:07:45,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:45,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,150 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:45,150 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:45,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2019-12-27 15:07:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 15:07:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2019-12-27 15:07:45,154 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 12 [2019-12-27 15:07:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,154 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2019-12-27 15:07:45,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2019-12-27 15:07:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:45,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,155 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,356 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2046685741, now seen corresponding path program 41 times [2019-12-27 15:07:45,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63934977] [2019-12-27 15:07:45,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63934977] [2019-12-27 15:07:45,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131807704] [2019-12-27 15:07:45,420 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,466 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:45,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:45,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:45,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1402200451] [2019-12-27 15:07:45,603 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,603 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,604 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:45,605 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,605 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:45,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:45,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:45,606 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,776 INFO L93 Difference]: Finished difference Result 135 states and 284 transitions. [2019-12-27 15:07:45,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:45,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,777 INFO L225 Difference]: With dead ends: 135 [2019-12-27 15:07:45,778 INFO L226 Difference]: Without dead ends: 134 [2019-12-27 15:07:45,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-27 15:07:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2019-12-27 15:07:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:45,782 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,782 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:45,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:45,783 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,783 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,986 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2046685648, now seen corresponding path program 42 times [2019-12-27 15:07:45,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934482215] [2019-12-27 15:07:45,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934482215] [2019-12-27 15:07:46,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895746080] [2019-12-27 15:07:46,046 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:46,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:46,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:46,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:46,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:46,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [897577380] [2019-12-27 15:07:46,213 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:46,215 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:46,216 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:46,216 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:46,217 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:46,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:46,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:46,218 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:46,394 INFO L93 Difference]: Finished difference Result 130 states and 276 transitions. [2019-12-27 15:07:46,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:46,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:46,395 INFO L225 Difference]: With dead ends: 130 [2019-12-27 15:07:46,395 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 15:07:46,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 15:07:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2019-12-27 15:07:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 15:07:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 15:07:46,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 15:07:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:46,398 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 15:07:46,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 15:07:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:46,399 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:46,399 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:46,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,602 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2046682858, now seen corresponding path program 43 times [2019-12-27 15:07:46,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:46,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671401738] [2019-12-27 15:07:46,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671401738] [2019-12-27 15:07:46,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871276960] [2019-12-27 15:07:46,670 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:46,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:46,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:46,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879979914] [2019-12-27 15:07:46,820 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:46,821 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:46,823 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:46,823 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:46,823 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:46,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:46,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:46,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:46,824 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:46,993 INFO L93 Difference]: Finished difference Result 131 states and 277 transitions. [2019-12-27 15:07:46,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:46,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:46,995 INFO L225 Difference]: With dead ends: 131 [2019-12-27 15:07:46,995 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 15:07:46,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 15:07:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2019-12-27 15:07:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:46,998 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:46,998 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:46,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:46,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:46,999 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:47,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,202 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2046682765, now seen corresponding path program 44 times [2019-12-27 15:07:47,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:47,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684109076] [2019-12-27 15:07:47,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684109076] [2019-12-27 15:07:47,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920043110] [2019-12-27 15:07:47,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:47,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:47,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:47,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:47,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:47,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2129934544] [2019-12-27 15:07:47,410 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:47,411 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:47,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:47,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:47,413 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:47,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:47,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:47,414 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:47,544 INFO L93 Difference]: Finished difference Result 125 states and 265 transitions. [2019-12-27 15:07:47,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:47,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:47,545 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:47,546 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:47,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 15:07:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2019-12-27 15:07:47,561 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 12 [2019-12-27 15:07:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:47,561 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2019-12-27 15:07:47,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2019-12-27 15:07:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:47,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:47,562 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:47,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,765 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2044004551, now seen corresponding path program 45 times [2019-12-27 15:07:47,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:47,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796569173] [2019-12-27 15:07:47,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796569173] [2019-12-27 15:07:47,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272350197] [2019-12-27 15:07:47,828 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:47,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:47,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:47,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:47,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:47,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1033353484] [2019-12-27 15:07:47,956 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:47,957 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:47,958 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:47,958 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:47,959 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:47,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:47,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:47,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:47,959 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:48,113 INFO L93 Difference]: Finished difference Result 123 states and 260 transitions. [2019-12-27 15:07:48,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:48,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:48,115 INFO L225 Difference]: With dead ends: 123 [2019-12-27 15:07:48,115 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 15:07:48,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 15:07:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2019-12-27 15:07:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:48,119 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:48,119 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:48,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:48,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:48,120 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:48,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,323 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2044004458, now seen corresponding path program 46 times [2019-12-27 15:07:48,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:48,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532735585] [2019-12-27 15:07:48,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:48,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532735585] [2019-12-27 15:07:48,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124255651] [2019-12-27 15:07:48,406 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:48,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:48,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:48,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:48,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:48,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:48,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1279644258] [2019-12-27 15:07:48,532 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:48,533 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:48,535 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:48,535 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:48,535 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:48,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:48,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:48,536 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:48,700 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 15:07:48,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:48,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:48,702 INFO L225 Difference]: With dead ends: 132 [2019-12-27 15:07:48,702 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 15:07:48,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 15:07:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 15:07:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 15:07:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 15:07:48,706 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 15:07:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:48,707 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 15:07:48,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 15:07:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:48,707 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:48,707 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:48,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,908 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 47 times [2019-12-27 15:07:48,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:48,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385627466] [2019-12-27 15:07:48,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:48,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385627466] [2019-12-27 15:07:48,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295970165] [2019-12-27 15:07:48,971 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 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 [2019-12-27 15:07:49,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:49,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:49,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:49,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:49,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:49,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1977158872] [2019-12-27 15:07:49,083 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,084 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,085 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:49,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,086 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:49,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:49,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:49,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:49,086 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:49,239 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-27 15:07:49,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:49,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:49,241 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:49,241 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:49,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2019-12-27 15:07:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:49,245 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:49,246 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:49,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:49,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:49,246 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:49,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,449 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001575, now seen corresponding path program 48 times [2019-12-27 15:07:49,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:49,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151723595] [2019-12-27 15:07:49,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:49,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151723595] [2019-12-27 15:07:49,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200989575] [2019-12-27 15:07:49,512 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,553 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:49,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:49,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:49,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:49,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:49,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [624476102] [2019-12-27 15:07:49,631 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,632 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,633 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:49,633 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,633 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:49,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:49,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:49,634 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:49,772 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 15:07:49,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:49,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:49,774 INFO L225 Difference]: With dead ends: 132 [2019-12-27 15:07:49,774 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 15:07:49,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 15:07:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2019-12-27 15:07:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 15:07:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2019-12-27 15:07:49,778 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 12 [2019-12-27 15:07:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:49,778 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2019-12-27 15:07:49,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2019-12-27 15:07:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:49,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:49,779 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:49,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,982 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:49,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2043915178, now seen corresponding path program 49 times [2019-12-27 15:07:49,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:49,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227766149] [2019-12-27 15:07:49,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:50,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227766149] [2019-12-27 15:07:50,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323143504] [2019-12-27 15:07:50,042 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:50,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:50,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:50,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:50,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [417474191] [2019-12-27 15:07:50,186 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:50,187 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:50,188 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:50,188 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:50,188 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:50,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:50,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:50,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:50,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:50,189 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,326 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2019-12-27 15:07:50,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:50,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,328 INFO L225 Difference]: With dead ends: 126 [2019-12-27 15:07:50,329 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 15:07:50,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 15:07:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2019-12-27 15:07:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:50,332 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,333 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:50,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:50,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,333 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,536 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2043915085, now seen corresponding path program 50 times [2019-12-27 15:07:50,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125086683] [2019-12-27 15:07:50,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:50,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125086683] [2019-12-27 15:07:50,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621121573] [2019-12-27 15:07:50,610 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:50,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:50,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:50,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,107 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_168 Int)) (and (<= c_~j~0 (+ v_~i~0_168 2)) (<= (div (+ (* v_~i~0_168 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~i~0_168 c_~j~0)))) is different from true [2019-12-27 15:07:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:51,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:51,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2004926010] [2019-12-27 15:07:51,109 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,110 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,111 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:51,111 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,111 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:51,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:51,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=113, Unknown=1, NotChecked=22, Total=182 [2019-12-27 15:07:51,112 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,279 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 15:07:51,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:51,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,280 INFO L225 Difference]: With dead ends: 132 [2019-12-27 15:07:51,280 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 15:07:51,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=237, Unknown=1, NotChecked=34, Total=380 [2019-12-27 15:07:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 15:07:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 15:07:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 15:07:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 15:07:51,284 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 15:07:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,284 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 15:07:51,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 15:07:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:51,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,285 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:51,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:51,488 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912295, now seen corresponding path program 51 times [2019-12-27 15:07:51,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:51,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880779875] [2019-12-27 15:07:51,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:51,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880779875] [2019-12-27 15:07:51,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663732945] [2019-12-27 15:07:51,549 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:51,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:51,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:51,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:51,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:51,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:51,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [652948143] [2019-12-27 15:07:51,670 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,671 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,672 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:51,672 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,673 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:51,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:51,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:51,673 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,816 INFO L93 Difference]: Finished difference Result 124 states and 261 transitions. [2019-12-27 15:07:51,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:51,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,818 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:51,818 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:51,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2019-12-27 15:07:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:07:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 15:07:51,821 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 15:07:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,821 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 15:07:51,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 15:07:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:51,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,822 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,025 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 52 times [2019-12-27 15:07:52,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232407069] [2019-12-27 15:07:52,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232407069] [2019-12-27 15:07:52,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666791742] [2019-12-27 15:07:52,088 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:52,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:52,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1735939465] [2019-12-27 15:07:52,210 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,211 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,212 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:52,213 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,213 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:07:52,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:52,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:52,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:52,214 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 15:07:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,335 INFO L93 Difference]: Finished difference Result 120 states and 251 transitions. [2019-12-27 15:07:52,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:52,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,337 INFO L225 Difference]: With dead ends: 120 [2019-12-27 15:07:52,337 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 15:07:52,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 15:07:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2019-12-27 15:07:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 15:07:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2019-12-27 15:07:52,340 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 12 [2019-12-27 15:07:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,340 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2019-12-27 15:07:52,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2019-12-27 15:07:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:52,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,341 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,545 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-27 15:07:52,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313044938] [2019-12-27 15:07:52,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313044938] [2019-12-27 15:07:52,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922702163] [2019-12-27 15:07:52,630 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,671 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:52,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1651344364] [2019-12-27 15:07:52,780 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,781 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,782 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 15:07:52,782 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,782 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:52,783 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand 9 states. [2019-12-27 15:07:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,944 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2019-12-27 15:07:52,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:52,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,945 INFO L225 Difference]: With dead ends: 120 [2019-12-27 15:07:52,945 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 15:07:52,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 15:07:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2019-12-27 15:07:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 15:07:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 15:07:52,949 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 15:07:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,949 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 15:07:52,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 15:07:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:52,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,950 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,152 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-27 15:07:53,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161458574] [2019-12-27 15:07:53,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161458574] [2019-12-27 15:07:53,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506036472] [2019-12-27 15:07:53,227 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:07:53,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [619585909] [2019-12-27 15:07:53,389 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,390 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,392 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 15:07:53,392 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,393 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:07:53,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:07:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:53,393 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 10 states. [2019-12-27 15:07:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,574 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-27 15:07:53,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:07:53,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 15:07:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,575 INFO L225 Difference]: With dead ends: 131 [2019-12-27 15:07:53,575 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 15:07:53,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:07:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 15:07:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-27 15:07:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:07:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:07:53,578 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:07:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,579 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:07:53,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:07:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:07:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,579 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,579 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,780 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 53 times [2019-12-27 15:07:53,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171905121] [2019-12-27 15:07:53,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171905121] [2019-12-27 15:07:53,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279830023] [2019-12-27 15:07:53,869 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:53,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1671396036] [2019-12-27 15:07:54,020 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,021 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,024 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 15:07:54,024 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,024 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,025 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:07:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,210 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2019-12-27 15:07:54,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,212 INFO L225 Difference]: With dead ends: 138 [2019-12-27 15:07:54,212 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 15:07:54,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 15:07:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2019-12-27 15:07:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:07:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:07:54,215 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:07:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,215 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:07:54,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:07:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,216 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,216 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,419 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 54 times [2019-12-27 15:07:54,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808036298] [2019-12-27 15:07:54,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808036298] [2019-12-27 15:07:54,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020980667] [2019-12-27 15:07:54,483 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,523 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:54,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,524 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [733457034] [2019-12-27 15:07:54,622 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,623 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,625 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:07:54,625 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,626 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,626 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:07:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,814 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2019-12-27 15:07:54,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,816 INFO L225 Difference]: With dead ends: 146 [2019-12-27 15:07:54,816 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 15:07:54,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 15:07:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2019-12-27 15:07:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:07:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:07:54,819 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:07:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,819 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:07:54,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:07:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,820 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,021 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 55 times [2019-12-27 15:07:55,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038901599] [2019-12-27 15:07:55,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038901599] [2019-12-27 15:07:55,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569499360] [2019-12-27 15:07:55,090 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:56,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [479975188] [2019-12-27 15:07:56,006 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,008 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,011 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:07:56,011 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,011 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=179, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:07:56,012 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:07:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,346 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2019-12-27 15:07:56,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,346 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,347 INFO L225 Difference]: With dead ends: 146 [2019-12-27 15:07:56,347 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 15:07:56,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=326, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:07:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 15:07:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2019-12-27 15:07:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:07:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:07:56,351 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:07:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,351 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:07:56,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:07:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,351 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,351 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,552 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 56 times [2019-12-27 15:07:56,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678452216] [2019-12-27 15:07:56,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:56,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678452216] [2019-12-27 15:07:56,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792125145] [2019-12-27 15:07:56,628 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:56,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:56,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:56,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [728882635] [2019-12-27 15:07:56,847 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,851 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:07:56,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,852 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,853 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:07:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,134 INFO L93 Difference]: Finished difference Result 149 states and 318 transitions. [2019-12-27 15:07:57,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:57,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,136 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:57,136 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:07:57,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:07:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 15:07:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:07:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:07:57,141 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:07:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,141 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:07:57,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:07:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:57,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,142 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,346 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 57 times [2019-12-27 15:07:57,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327076531] [2019-12-27 15:07:57,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:57,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327076531] [2019-12-27 15:07:57,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028133312] [2019-12-27 15:07:57,447 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:57,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:58,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:58,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:58,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [481774738] [2019-12-27 15:07:58,086 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:58,086 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:58,088 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:07:58,088 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:58,089 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:58,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:58,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:58,089 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:07:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:58,297 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 15:07:58,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:58,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:58,299 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:58,299 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:07:58,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:07:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2019-12-27 15:07:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:07:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 15:07:58,302 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 15:07:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:58,303 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 15:07:58,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 15:07:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:58,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:58,303 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:58,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:58,507 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 58 times [2019-12-27 15:07:58,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:58,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653714648] [2019-12-27 15:07:58,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:58,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653714648] [2019-12-27 15:07:58,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15066127] [2019-12-27 15:07:58,581 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:58,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:58,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:58,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:58,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:59,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:59,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1196359235] [2019-12-27 15:07:59,870 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,870 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,872 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:07:59,872 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,873 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:59,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:59,873 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 15:08:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,683 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2019-12-27 15:08:00,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,684 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:08:00,684 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:08:00,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=134, Invalid=326, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:08:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:08:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2019-12-27 15:08:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:08:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 15:08:00,688 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 15:08:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,688 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 15:08:00,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 15:08:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,689 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:00,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,892 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 59 times [2019-12-27 15:08:00,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:00,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850563928] [2019-12-27 15:08:00,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:00,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850563928] [2019-12-27 15:08:00,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285253490] [2019-12-27 15:08:00,968 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,013 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:01,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:01,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:01,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:02,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1618425329] [2019-12-27 15:08:02,471 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,472 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,474 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:02,474 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,474 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:02,475 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 15:08:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,199 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 15:08:03,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,200 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,201 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:08:03,201 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:08:03,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=323, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:08:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:08:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 15:08:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:08:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:08:03,204 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:08:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,204 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:08:03,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:08:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,205 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,205 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,406 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707713, now seen corresponding path program 60 times [2019-12-27 15:08:03,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083586819] [2019-12-27 15:08:03,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:03,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083586819] [2019-12-27 15:08:03,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041352109] [2019-12-27 15:08:03,471 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:03,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:03,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:03,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1649024471] [2019-12-27 15:08:03,629 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,631 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,633 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:03,633 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,633 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,633 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:08:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,799 INFO L93 Difference]: Finished difference Result 147 states and 313 transitions. [2019-12-27 15:08:03,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,801 INFO L225 Difference]: With dead ends: 147 [2019-12-27 15:08:03,801 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 15:08:03,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 15:08:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2019-12-27 15:08:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:08:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:08:03,805 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:08:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,805 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:08:03,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:08:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,806 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,008 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 61 times [2019-12-27 15:08:04,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318857717] [2019-12-27 15:08:04,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:04,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318857717] [2019-12-27 15:08:04,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006333884] [2019-12-27 15:08:04,077 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:04,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:04,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [43240344] [2019-12-27 15:08:04,296 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,298 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,301 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:04,301 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,302 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,302 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:08:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,591 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 15:08:04,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,593 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:08:04,593 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:08:04,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:08:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2019-12-27 15:08:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 15:08:04,598 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 15:08:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,599 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 15:08:04,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 15:08:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,600 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,600 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,801 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 62 times [2019-12-27 15:08:04,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989647725] [2019-12-27 15:08:04,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:04,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989647725] [2019-12-27 15:08:04,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976519654] [2019-12-27 15:08:04,903 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:04,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:04,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:04,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1538700441] [2019-12-27 15:08:05,136 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,137 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,140 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:05,140 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,140 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,141 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 15:08:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,400 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 15:08:05,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:05,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,401 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:05,401 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:05,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2019-12-27 15:08:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 15:08:05,405 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 15:08:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,405 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 15:08:05,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 15:08:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,406 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:05,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,607 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 63 times [2019-12-27 15:08:05,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:05,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005665183] [2019-12-27 15:08:05,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005665183] [2019-12-27 15:08:05,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81182996] [2019-12-27 15:08:05,692 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:05,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [460521063] [2019-12-27 15:08:05,891 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,892 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,894 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:05,894 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,895 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,895 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 15:08:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,114 INFO L93 Difference]: Finished difference Result 151 states and 326 transitions. [2019-12-27 15:08:06,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,116 INFO L225 Difference]: With dead ends: 151 [2019-12-27 15:08:06,116 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 15:08:06,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 15:08:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2019-12-27 15:08:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:08:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 15:08:06,119 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 15:08:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,119 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 15:08:06,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 15:08:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,120 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,321 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 64 times [2019-12-27 15:08:06,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205957136] [2019-12-27 15:08:06,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:06,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205957136] [2019-12-27 15:08:06,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720628693] [2019-12-27 15:08:06,390 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,430 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:06,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:06,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [855393647] [2019-12-27 15:08:06,590 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,591 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,593 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:06,593 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,593 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,594 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 15:08:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,808 INFO L93 Difference]: Finished difference Result 152 states and 324 transitions. [2019-12-27 15:08:06,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,810 INFO L225 Difference]: With dead ends: 152 [2019-12-27 15:08:06,810 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 15:08:06,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:06,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 15:08:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2019-12-27 15:08:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:08:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 15:08:06,813 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 15:08:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,814 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 15:08:06,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 15:08:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,814 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,814 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,015 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 65 times [2019-12-27 15:08:07,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103826652] [2019-12-27 15:08:07,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103826652] [2019-12-27 15:08:07,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196047814] [2019-12-27 15:08:07,082 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,120 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:07,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:07,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:07,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1663749745] [2019-12-27 15:08:07,302 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:07,303 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:07,305 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:07,305 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:07,305 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:07,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:07,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:07,306 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 15:08:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:07,552 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2019-12-27 15:08:07,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:07,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:07,553 INFO L225 Difference]: With dead ends: 152 [2019-12-27 15:08:07,553 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 15:08:07,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 15:08:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 113. [2019-12-27 15:08:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 15:08:07,556 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 15:08:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:07,556 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 15:08:07,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 15:08:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:07,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:07,557 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,760 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 66 times [2019-12-27 15:08:07,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391597935] [2019-12-27 15:08:07,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391597935] [2019-12-27 15:08:07,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653369733] [2019-12-27 15:08:07,847 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,897 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:07,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:10,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:10,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:10,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340825746] [2019-12-27 15:08:10,139 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:10,140 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:10,142 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:10,142 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:10,143 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:10,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:10,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:10,143 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 15:08:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:12,414 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 15:08:12,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:12,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:12,416 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:08:12,416 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:08:12,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=130, Invalid=331, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:08:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2019-12-27 15:08:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 15:08:12,420 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 15:08:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:12,420 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 15:08:12,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 15:08:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:12,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:12,421 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,621 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615364, now seen corresponding path program 67 times [2019-12-27 15:08:12,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985693133] [2019-12-27 15:08:12,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:12,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985693133] [2019-12-27 15:08:12,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131002374] [2019-12-27 15:08:12,695 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:12,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:12,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:12,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843535591] [2019-12-27 15:08:12,919 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:12,920 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:12,922 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:12,922 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:12,923 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:12,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:12,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:12,923 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 15:08:13,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:13,155 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 15:08:13,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:13,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:13,157 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:08:13,157 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:08:13,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:08:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 15:08:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:08:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 15:08:13,160 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 15:08:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:13,160 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 15:08:13,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 15:08:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:13,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:13,161 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:13,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,364 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash 35069218, now seen corresponding path program 68 times [2019-12-27 15:08:13,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:13,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899294687] [2019-12-27 15:08:13,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:13,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899294687] [2019-12-27 15:08:13,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086547251] [2019-12-27 15:08:13,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:13,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:13,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:13,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:13,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:13,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:13,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898633107] [2019-12-27 15:08:13,577 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:13,578 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:13,579 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:13,579 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:13,580 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:13,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:13,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:13,580 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 15:08:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:13,743 INFO L93 Difference]: Finished difference Result 141 states and 298 transitions. [2019-12-27 15:08:13,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:13,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:13,745 INFO L225 Difference]: With dead ends: 141 [2019-12-27 15:08:13,745 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 15:08:13,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 15:08:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2019-12-27 15:08:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:13,749 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:13,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:13,749 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:13,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:13,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:13,750 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:13,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,952 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 35069311, now seen corresponding path program 69 times [2019-12-27 15:08:13,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:13,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142185208] [2019-12-27 15:08:13,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:14,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142185208] [2019-12-27 15:08:14,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949882345] [2019-12-27 15:08:14,021 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:14,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:14,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:14,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:14,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:14,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:14,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:14,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1963914808] [2019-12-27 15:08:14,162 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:14,163 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:14,165 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:14,166 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:14,166 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:14,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:14,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:14,166 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:14,371 INFO L93 Difference]: Finished difference Result 150 states and 319 transitions. [2019-12-27 15:08:14,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:14,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:14,373 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:08:14,373 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:08:14,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:08:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2019-12-27 15:08:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:14,376 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:14,376 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:14,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:14,377 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:14,377 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:14,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:14,580 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash 35072101, now seen corresponding path program 70 times [2019-12-27 15:08:14,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:14,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643359718] [2019-12-27 15:08:14,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:14,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643359718] [2019-12-27 15:08:14,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457355442] [2019-12-27 15:08:14,654 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:14,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:14,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:14,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:14,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:15,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:15,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:15,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477118078] [2019-12-27 15:08:15,383 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:15,384 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:15,385 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:15,386 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:15,386 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:15,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:15,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:15,386 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:16,746 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 15:08:16,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:08:16,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:16,748 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:16,748 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:16,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=396, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:08:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2019-12-27 15:08:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:16,751 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:16,752 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:16,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:16,752 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:16,753 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:16,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,956 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash 35072194, now seen corresponding path program 71 times [2019-12-27 15:08:16,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:16,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459404648] [2019-12-27 15:08:16,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:17,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459404648] [2019-12-27 15:08:17,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349858613] [2019-12-27 15:08:17,040 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,084 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:17,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:17,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:17,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:17,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:17,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:17,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1676300523] [2019-12-27 15:08:17,187 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:17,188 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:17,189 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:17,189 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:17,190 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:17,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:17,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:17,190 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:17,384 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 15:08:17,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:17,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:17,386 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:17,386 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:17,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-12-27 15:08:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 15:08:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 15:08:17,389 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 15:08:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:17,390 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 15:08:17,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 15:08:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:17,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:17,390 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:17,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,591 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:17,592 INFO L82 PathProgramCache]: Analyzing trace with hash 35158591, now seen corresponding path program 72 times [2019-12-27 15:08:17,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:17,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305432773] [2019-12-27 15:08:17,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:17,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305432773] [2019-12-27 15:08:17,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496707978] [2019-12-27 15:08:17,663 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,706 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:17,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:17,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:17,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:19,527 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_234 Int)) (and (<= c_~i~0 (+ v_~j~0_234 2)) (<= (div (+ (* v_~j~0_234 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 c_~i~0) v_~j~0_234)))) is different from true [2019-12-27 15:08:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:19,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:19,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:19,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [449586873] [2019-12-27 15:08:19,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:19,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:19,531 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:19,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:19,532 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:19,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:19,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:19,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=4, NotChecked=26, Total=240 [2019-12-27 15:08:19,532 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 15:08:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:19,994 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 15:08:19,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:19,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:19,996 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:19,996 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:19,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=4, NotChecked=40, Total=506 [2019-12-27 15:08:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-12-27 15:08:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 15:08:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 15:08:20,000 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 15:08:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:20,000 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 15:08:20,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 15:08:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:20,001 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:20,001 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:20,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,202 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:20,203 INFO L82 PathProgramCache]: Analyzing trace with hash 35158684, now seen corresponding path program 73 times [2019-12-27 15:08:20,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:20,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601242447] [2019-12-27 15:08:20,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:20,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601242447] [2019-12-27 15:08:20,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038850255] [2019-12-27 15:08:20,278 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:20,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:22,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:22,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:22,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [258432212] [2019-12-27 15:08:22,463 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:22,465 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:22,466 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:22,466 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:22,467 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:22,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:22,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:22,467 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 15:08:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:22,757 INFO L93 Difference]: Finished difference Result 154 states and 332 transitions. [2019-12-27 15:08:22,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:22,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:22,759 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:22,759 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:22,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=144, Invalid=361, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:08:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2019-12-27 15:08:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:22,762 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:22,763 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:22,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:22,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:22,763 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:22,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,965 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash 35161474, now seen corresponding path program 74 times [2019-12-27 15:08:22,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:22,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964433042] [2019-12-27 15:08:22,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964433042] [2019-12-27 15:08:23,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885642741] [2019-12-27 15:08:23,040 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:23,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:23,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1258758989] [2019-12-27 15:08:23,344 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,345 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,347 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:23,347 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,347 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:23,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,348 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,636 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 15:08:23,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:23,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,638 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:08:23,638 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:08:23,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:08:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2019-12-27 15:08:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:23,641 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,641 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:23,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,642 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,642 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:23,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,843 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash 35161567, now seen corresponding path program 75 times [2019-12-27 15:08:23,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:23,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583961756] [2019-12-27 15:08:23,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583961756] [2019-12-27 15:08:23,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145437959] [2019-12-27 15:08:23,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:23,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:23,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [108509518] [2019-12-27 15:08:24,077 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,078 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,080 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:24,080 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,080 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:24,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,081 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,251 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 15:08:24,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,253 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:08:24,253 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:08:24,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:08:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 15:08:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:24,257 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,257 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:24,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,258 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,258 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,461 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash 37839781, now seen corresponding path program 76 times [2019-12-27 15:08:24,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895069936] [2019-12-27 15:08:24,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895069936] [2019-12-27 15:08:24,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486604245] [2019-12-27 15:08:24,554 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,607 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:24,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:24,608 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [653728634] [2019-12-27 15:08:24,740 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,741 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,743 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:24,743 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,743 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:24,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,744 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,909 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 15:08:24,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,910 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:08:24,910 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:08:24,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:08:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 115. [2019-12-27 15:08:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:24,917 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,917 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:24,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,918 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,121 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,122 INFO L82 PathProgramCache]: Analyzing trace with hash 37839874, now seen corresponding path program 77 times [2019-12-27 15:08:25,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420080815] [2019-12-27 15:08:25,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420080815] [2019-12-27 15:08:25,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880042475] [2019-12-27 15:08:25,197 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,243 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:25,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:25,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80381819] [2019-12-27 15:08:25,360 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,361 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,363 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:25,363 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,363 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:25,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,364 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:25,565 INFO L93 Difference]: Finished difference Result 151 states and 329 transitions. [2019-12-27 15:08:25,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:25,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:25,567 INFO L225 Difference]: With dead ends: 151 [2019-12-27 15:08:25,567 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 15:08:25,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 15:08:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2019-12-27 15:08:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:25,571 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:25,571 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:25,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:25,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:25,572 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,775 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,775 INFO L82 PathProgramCache]: Analyzing trace with hash 37842664, now seen corresponding path program 78 times [2019-12-27 15:08:25,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427396680] [2019-12-27 15:08:25,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427396680] [2019-12-27 15:08:25,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020954336] [2019-12-27 15:08:25,859 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,899 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:25,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:25,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [888264359] [2019-12-27 15:08:25,990 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,991 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,993 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:25,993 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,993 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:25,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,993 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,191 INFO L93 Difference]: Finished difference Result 153 states and 331 transitions. [2019-12-27 15:08:26,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,193 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:08:26,193 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:08:26,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:08:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 117. [2019-12-27 15:08:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:26,196 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,197 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:26,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,197 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,398 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash 37842757, now seen corresponding path program 79 times [2019-12-27 15:08:26,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389821563] [2019-12-27 15:08:26,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389821563] [2019-12-27 15:08:26,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334334660] [2019-12-27 15:08:26,469 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:26,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1664767041] [2019-12-27 15:08:26,601 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,602 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,604 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:26,604 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,604 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:26,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,605 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,784 INFO L93 Difference]: Finished difference Result 151 states and 326 transitions. [2019-12-27 15:08:26,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,786 INFO L225 Difference]: With dead ends: 151 [2019-12-27 15:08:26,786 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 15:08:26,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 15:08:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2019-12-27 15:08:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 15:08:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 15:08:26,789 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 15:08:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,789 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 15:08:26,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 15:08:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,790 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,991 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash 37929154, now seen corresponding path program 80 times [2019-12-27 15:08:26,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547401812] [2019-12-27 15:08:26,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547401812] [2019-12-27 15:08:27,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570029457] [2019-12-27 15:08:27,072 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:27,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784888988] [2019-12-27 15:08:27,223 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,224 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,226 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,226 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,226 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:27,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,226 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 15:08:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,426 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 15:08:27,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,427 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:08:27,427 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:08:27,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:08:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2019-12-27 15:08:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 15:08:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 15:08:27,430 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 15:08:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,430 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 15:08:27,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 15:08:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,431 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,431 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:27,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,632 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash 37929247, now seen corresponding path program 81 times [2019-12-27 15:08:27,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:27,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658921016] [2019-12-27 15:08:27,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658921016] [2019-12-27 15:08:27,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680146758] [2019-12-27 15:08:27,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:27,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:28,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:28,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:28,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1539381225] [2019-12-27 15:08:28,993 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:28,994 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:28,995 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:28,995 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:28,995 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:28,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:28,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=176, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:08:28,996 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 15:08:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,270 INFO L93 Difference]: Finished difference Result 152 states and 330 transitions. [2019-12-27 15:08:29,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,272 INFO L225 Difference]: With dead ends: 152 [2019-12-27 15:08:29,272 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 15:08:29,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=331, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:08:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 15:08:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2019-12-27 15:08:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:29,275 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:29,275 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:29,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:29,276 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:29,276 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,477 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash 37932037, now seen corresponding path program 82 times [2019-12-27 15:08:29,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868019605] [2019-12-27 15:08:29,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868019605] [2019-12-27 15:08:29,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967212888] [2019-12-27 15:08:29,551 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:29,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:29,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1210645020] [2019-12-27 15:08:29,695 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,696 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,697 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,697 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,698 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:29,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:29,698 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,930 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2019-12-27 15:08:29,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,931 INFO L225 Difference]: With dead ends: 152 [2019-12-27 15:08:29,932 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 15:08:29,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 15:08:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2019-12-27 15:08:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:08:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 15:08:29,935 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 15:08:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:29,935 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 15:08:29,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 15:08:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:29,936 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:29,936 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,139 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 37932130, now seen corresponding path program 83 times [2019-12-27 15:08:30,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982141983] [2019-12-27 15:08:30,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982141983] [2019-12-27 15:08:30,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164026622] [2019-12-27 15:08:30,212 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:30,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:30,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:30,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [695175450] [2019-12-27 15:08:30,354 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:30,355 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:30,357 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:30,357 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:30,357 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:30,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:30,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:30,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:30,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:30,358 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 15:08:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:30,549 INFO L93 Difference]: Finished difference Result 147 states and 316 transitions. [2019-12-27 15:08:30,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:30,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:30,551 INFO L225 Difference]: With dead ends: 147 [2019-12-27 15:08:30,551 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 15:08:30,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 15:08:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2019-12-27 15:08:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:30,553 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,554 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:30,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,554 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,757 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash 974481212, now seen corresponding path program 84 times [2019-12-27 15:08:30,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222448712] [2019-12-27 15:08:30,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222448712] [2019-12-27 15:08:30,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435945385] [2019-12-27 15:08:30,829 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,870 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:30,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:30,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:30,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1672877949] [2019-12-27 15:08:30,968 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:30,968 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:30,970 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 15:08:30,970 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:30,972 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 15:08:30,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:30,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:30,973 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:31,185 INFO L93 Difference]: Finished difference Result 142 states and 302 transitions. [2019-12-27 15:08:31,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:31,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:31,186 INFO L225 Difference]: With dead ends: 142 [2019-12-27 15:08:31,187 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 15:08:31,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 15:08:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2019-12-27 15:08:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:31,190 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:31,190 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:31,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:31,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:31,191 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:31,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,394 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:31,395 INFO L82 PathProgramCache]: Analyzing trace with hash 974484002, now seen corresponding path program 85 times [2019-12-27 15:08:31,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:31,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744515407] [2019-12-27 15:08:31,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:31,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744515407] [2019-12-27 15:08:31,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18703924] [2019-12-27 15:08:31,464 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:31,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:31,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:31,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:31,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:31,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2040299799] [2019-12-27 15:08:31,628 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:31,630 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:31,632 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:08:31,632 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:31,633 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:08:31,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:31,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:31,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:31,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:31,634 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,234 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 15:08:32,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,236 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:08:32,236 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:08:32,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=325, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:08:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 15:08:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:32,239 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,239 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:32,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:32,240 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:32,240 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:32,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,441 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:32,442 INFO L82 PathProgramCache]: Analyzing trace with hash 974484095, now seen corresponding path program 86 times [2019-12-27 15:08:32,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:32,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918004075] [2019-12-27 15:08:32,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918004075] [2019-12-27 15:08:32,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468361103] [2019-12-27 15:08:32,523 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:32,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [682537821] [2019-12-27 15:08:32,674 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,675 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,677 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:08:32,677 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,678 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:08:32,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,679 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,871 INFO L93 Difference]: Finished difference Result 148 states and 314 transitions. [2019-12-27 15:08:32,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,873 INFO L225 Difference]: With dead ends: 148 [2019-12-27 15:08:32,873 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 15:08:32,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 15:08:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 113. [2019-12-27 15:08:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 15:08:32,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 15:08:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,876 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 15:08:32,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 15:08:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:32,876 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:32,876 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:33,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,077 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash 974570492, now seen corresponding path program 87 times [2019-12-27 15:08:33,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:33,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376941111] [2019-12-27 15:08:33,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:33,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376941111] [2019-12-27 15:08:33,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783760241] [2019-12-27 15:08:33,155 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:33,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:33,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:33,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:34,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:34,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:34,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1110460710] [2019-12-27 15:08:34,266 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:34,267 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:34,270 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:34,270 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:34,271 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:34,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:34,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:34,272 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 15:08:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:35,037 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2019-12-27 15:08:35,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:35,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:35,039 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:08:35,039 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:08:35,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=137, Invalid=323, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:08:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:08:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 15:08:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:35,043 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:35,044 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:35,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:35,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:35,044 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:35,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,248 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash 974570585, now seen corresponding path program 88 times [2019-12-27 15:08:35,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:35,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497161906] [2019-12-27 15:08:35,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:35,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497161906] [2019-12-27 15:08:35,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219562973] [2019-12-27 15:08:35,322 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:35,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:35,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:35,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:36,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:36,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:36,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [280488563] [2019-12-27 15:08:36,148 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,149 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,151 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:36,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,152 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:36,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:36,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:36,152 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,410 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 15:08:36,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:36,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,412 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:36,412 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:36,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 114. [2019-12-27 15:08:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:36,416 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,416 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:36,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:36,417 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,417 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:36,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,618 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash 974573375, now seen corresponding path program 89 times [2019-12-27 15:08:36,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:36,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350158375] [2019-12-27 15:08:36,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:36,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350158375] [2019-12-27 15:08:36,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208489236] [2019-12-27 15:08:36,685 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,730 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:36,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:36,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:36,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:37,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393675235] [2019-12-27 15:08:37,140 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,141 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,142 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:37,143 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,143 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:37,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:37,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:37,144 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,402 INFO L93 Difference]: Finished difference Result 155 states and 327 transitions. [2019-12-27 15:08:37,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:37,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,403 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:08:37,403 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:08:37,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:08:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 115. [2019-12-27 15:08:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:37,406 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,407 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:37,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:37,407 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,407 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,611 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash 974573468, now seen corresponding path program 90 times [2019-12-27 15:08:37,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385988594] [2019-12-27 15:08:37,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385988594] [2019-12-27 15:08:37,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902686895] [2019-12-27 15:08:37,684 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:37,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:37,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555300469] [2019-12-27 15:08:37,870 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,871 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,874 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:37,874 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,875 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:37,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:37,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:37,875 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:38,052 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-27 15:08:38,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:38,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:38,053 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:08:38,053 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:08:38,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:08:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2019-12-27 15:08:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:08:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2019-12-27 15:08:38,057 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 13 [2019-12-27 15:08:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:38,057 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2019-12-27 15:08:38,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2019-12-27 15:08:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:38,058 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:38,058 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:38,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,261 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash 977251682, now seen corresponding path program 91 times [2019-12-27 15:08:38,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:38,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474400718] [2019-12-27 15:08:38,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:38,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474400718] [2019-12-27 15:08:38,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754281279] [2019-12-27 15:08:38,349 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:38,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:38,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:38,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:38,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466415114] [2019-12-27 15:08:38,605 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:38,606 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:38,608 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:38,608 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:38,609 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:38,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:38,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:38,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:38,610 INFO L87 Difference]: Start difference. First operand 112 states and 247 transitions. Second operand 9 states. [2019-12-27 15:08:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:38,872 INFO L93 Difference]: Finished difference Result 159 states and 334 transitions. [2019-12-27 15:08:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:38,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:38,874 INFO L225 Difference]: With dead ends: 159 [2019-12-27 15:08:38,874 INFO L226 Difference]: Without dead ends: 158 [2019-12-27 15:08:38,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-27 15:08:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 115. [2019-12-27 15:08:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:38,878 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:38,878 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:38,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:38,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:38,879 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,081 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash 977251775, now seen corresponding path program 92 times [2019-12-27 15:08:39,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97393975] [2019-12-27 15:08:39,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:39,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97393975] [2019-12-27 15:08:39,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123188141] [2019-12-27 15:08:39,151 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:39,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:39,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:39,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:43,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:43,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:43,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [559484838] [2019-12-27 15:08:43,415 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:43,416 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:43,417 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:43,417 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:43,418 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:43,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:43,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:43,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:43,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:43,419 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:45,693 INFO L93 Difference]: Finished difference Result 153 states and 325 transitions. [2019-12-27 15:08:45,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:45,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:45,695 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:08:45,695 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:08:45,695 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=130, Invalid=331, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:08:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2019-12-27 15:08:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:45,698 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:45,699 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:45,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:45,699 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:45,699 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:45,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:45,900 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:45,901 INFO L82 PathProgramCache]: Analyzing trace with hash 977254565, now seen corresponding path program 93 times [2019-12-27 15:08:45,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:45,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801360723] [2019-12-27 15:08:45,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:45,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801360723] [2019-12-27 15:08:45,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724973068] [2019-12-27 15:08:45,997 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:46,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:46,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:46,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:46,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:46,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:46,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1793444371] [2019-12-27 15:08:46,212 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:46,212 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:46,214 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:46,214 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:46,215 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:46,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:46,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:46,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:46,215 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:46,462 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 15:08:46,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:46,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:46,463 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:46,463 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:46,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2019-12-27 15:08:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:46,467 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:46,467 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:46,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:46,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:46,468 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:46,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,671 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash 977254658, now seen corresponding path program 94 times [2019-12-27 15:08:46,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:46,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299077604] [2019-12-27 15:08:46,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:46,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299077604] [2019-12-27 15:08:46,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290529152] [2019-12-27 15:08:46,777 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,826 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:46,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:46,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:46,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:47,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:47,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [703664787] [2019-12-27 15:08:47,032 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:47,033 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:47,035 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:47,035 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:47,036 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:47,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:47,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:47,037 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:47,249 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 15:08:47,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:47,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:47,250 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:47,250 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:47,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2019-12-27 15:08:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 15:08:47,253 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 15:08:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:47,254 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 15:08:47,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 15:08:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:47,254 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:47,254 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:47,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,455 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash 977341055, now seen corresponding path program 95 times [2019-12-27 15:08:47,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:47,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223202056] [2019-12-27 15:08:47,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223202056] [2019-12-27 15:08:47,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343978753] [2019-12-27 15:08:47,525 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:47,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:47,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:47,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:47,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:47,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759439020] [2019-12-27 15:08:47,700 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:47,701 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:47,702 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:47,702 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:47,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:47,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:47,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:47,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:47,704 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 15:08:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:47,931 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2019-12-27 15:08:47,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:47,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:47,932 INFO L225 Difference]: With dead ends: 158 [2019-12-27 15:08:47,933 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 15:08:47,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 15:08:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 115. [2019-12-27 15:08:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:47,936 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:47,936 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:47,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:47,936 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:47,936 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:48,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,137 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash 977341148, now seen corresponding path program 96 times [2019-12-27 15:08:48,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:48,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638276771] [2019-12-27 15:08:48,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:48,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638276771] [2019-12-27 15:08:48,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712682105] [2019-12-27 15:08:48,208 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,249 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:48,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:48,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:48,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:48,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:48,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:48,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1769487227] [2019-12-27 15:08:48,404 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:48,406 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:48,407 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:48,408 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:48,408 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:48,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:48,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:48,409 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:48,753 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-27 15:08:48,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:48,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:48,754 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:08:48,754 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:08:48,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:08:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2019-12-27 15:08:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:48,758 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:48,758 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:48,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:48,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:48,759 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:48,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,963 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash 977343938, now seen corresponding path program 97 times [2019-12-27 15:08:48,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:48,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830245891] [2019-12-27 15:08:48,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830245891] [2019-12-27 15:08:49,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032229955] [2019-12-27 15:08:49,047 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:49,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:49,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:49,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:49,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1114525368] [2019-12-27 15:08:49,214 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:49,215 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:49,217 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:49,217 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:49,218 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:49,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:49,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:49,218 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:49,435 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2019-12-27 15:08:49,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:49,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:49,436 INFO L225 Difference]: With dead ends: 152 [2019-12-27 15:08:49,436 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 15:08:49,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 15:08:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2019-12-27 15:08:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:49,442 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:49,442 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:49,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:49,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:49,443 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:49,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,646 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash 977344031, now seen corresponding path program 98 times [2019-12-27 15:08:49,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:49,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596486663] [2019-12-27 15:08:49,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596486663] [2019-12-27 15:08:49,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586281764] [2019-12-27 15:08:49,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:49,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:49,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:49,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:49,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:49,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [38581670] [2019-12-27 15:08:49,847 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:49,848 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:49,850 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:08:49,850 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:49,851 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:08:49,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:49,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:49,852 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:50,017 INFO L93 Difference]: Finished difference Result 144 states and 304 transitions. [2019-12-27 15:08:50,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:50,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:50,019 INFO L225 Difference]: With dead ends: 144 [2019-12-27 15:08:50,019 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 15:08:50,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 15:08:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2019-12-27 15:08:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 15:08:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 243 transitions. [2019-12-27 15:08:50,021 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 243 transitions. Word has length 13 [2019-12-27 15:08:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:50,022 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 243 transitions. [2019-12-27 15:08:50,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 243 transitions. [2019-12-27 15:08:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:50,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:50,022 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:50,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,224 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1060368572, now seen corresponding path program 99 times [2019-12-27 15:08:50,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:50,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338157900] [2019-12-27 15:08:50,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:50,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338157900] [2019-12-27 15:08:50,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559180826] [2019-12-27 15:08:50,289 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:50,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:50,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:50,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:50,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:50,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:50,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [741984515] [2019-12-27 15:08:50,426 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:50,427 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:50,428 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:50,428 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:50,429 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:50,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:50,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:50,430 INFO L87 Difference]: Start difference. First operand 111 states and 243 transitions. Second operand 9 states. [2019-12-27 15:08:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:50,596 INFO L93 Difference]: Finished difference Result 141 states and 298 transitions. [2019-12-27 15:08:50,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:50,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:50,598 INFO L225 Difference]: With dead ends: 141 [2019-12-27 15:08:50,598 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 15:08:50,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 15:08:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2019-12-27 15:08:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:50,601 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:50,601 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:50,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:50,602 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:50,602 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:50,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,805 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1060368665, now seen corresponding path program 100 times [2019-12-27 15:08:50,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:50,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520323663] [2019-12-27 15:08:50,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:50,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520323663] [2019-12-27 15:08:50,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736509629] [2019-12-27 15:08:50,873 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:50,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:50,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:50,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:51,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:51,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:51,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80327438] [2019-12-27 15:08:51,023 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:51,023 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:51,025 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:51,025 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:51,025 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:51,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:51,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:51,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:51,026 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:51,232 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 15:08:51,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:51,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:51,233 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:08:51,233 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:08:51,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:08:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2019-12-27 15:08:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:51,237 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:51,238 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:51,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:51,238 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:51,238 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:51,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:51,439 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1060371455, now seen corresponding path program 101 times [2019-12-27 15:08:51,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:51,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080524103] [2019-12-27 15:08:51,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:51,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080524103] [2019-12-27 15:08:51,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583143988] [2019-12-27 15:08:51,541 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:51,580 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:51,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:51,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:51,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:52,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:52,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:52,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1270002507] [2019-12-27 15:08:52,645 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:52,647 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:52,648 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:52,648 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:52,649 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:52,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:52,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:52,649 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:53,725 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2019-12-27 15:08:53,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:53,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:53,726 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:08:53,726 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:08:53,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=332, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:08:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 15:08:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:53,730 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:53,730 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:53,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:53,731 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:53,731 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:53,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:53,931 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:53,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1060371548, now seen corresponding path program 102 times [2019-12-27 15:08:53,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:53,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404235129] [2019-12-27 15:08:53,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404235129] [2019-12-27 15:08:54,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777485862] [2019-12-27 15:08:54,003 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:54,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:54,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:54,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:54,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:54,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [531639571] [2019-12-27 15:08:54,157 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:54,158 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:54,160 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:54,160 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:54,160 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:54,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:54,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:54,161 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:54,363 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 15:08:54,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:54,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:54,364 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:08:54,365 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:08:54,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:08:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-12-27 15:08:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:08:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 15:08:54,368 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 15:08:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:54,368 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 15:08:54,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 15:08:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:54,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:54,368 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:54,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,569 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1060457945, now seen corresponding path program 103 times [2019-12-27 15:08:54,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:54,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897952280] [2019-12-27 15:08:54,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897952280] [2019-12-27 15:08:54,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128219293] [2019-12-27 15:08:54,638 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:54,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:54,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:54,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:54,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1676549309] [2019-12-27 15:08:54,802 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:54,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:54,805 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:54,805 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:54,805 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:54,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:54,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:54,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:54,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:54,806 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 15:08:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:54,995 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 15:08:54,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:54,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:54,996 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:08:54,997 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:08:54,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:08:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 15:08:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:54,999 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:55,000 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:55,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:55,000 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:55,000 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:55,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:55,201 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1060458038, now seen corresponding path program 104 times [2019-12-27 15:08:55,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:55,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215669909] [2019-12-27 15:08:55,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:55,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215669909] [2019-12-27 15:08:55,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875982643] [2019-12-27 15:08:55,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:55,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:55,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:55,318 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:55,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:55,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:55,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:55,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157945328] [2019-12-27 15:08:55,419 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:55,421 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:55,422 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:55,422 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:55,422 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:55,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:55,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:55,423 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:55,632 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 15:08:55,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:55,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:55,633 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:08:55,633 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:08:55,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:08:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2019-12-27 15:08:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:55,636 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:55,636 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:55,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:55,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:55,637 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:55,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:55,838 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460828, now seen corresponding path program 105 times [2019-12-27 15:08:55,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:55,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642759979] [2019-12-27 15:08:55,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:55,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642759979] [2019-12-27 15:08:55,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974924952] [2019-12-27 15:08:55,913 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:55,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:55,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:55,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:55,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:56,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:56,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:56,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [308002296] [2019-12-27 15:08:56,044 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:56,045 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:56,046 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:56,046 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:56,047 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:56,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:56,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:56,048 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:56,260 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 15:08:56,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:56,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:56,261 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:08:56,261 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:08:56,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:08:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 15:08:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:56,264 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:56,265 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:56,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:56,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:56,265 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:56,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,466 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460921, now seen corresponding path program 106 times [2019-12-27 15:08:56,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:56,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959909269] [2019-12-27 15:08:56,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:56,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959909269] [2019-12-27 15:08:56,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767114153] [2019-12-27 15:08:56,533 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:56,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:56,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:56,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:56,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:56,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:56,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340765631] [2019-12-27 15:08:56,663 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:56,664 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:56,666 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:56,666 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:56,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:56,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:56,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:56,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:56,667 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:56,836 INFO L93 Difference]: Finished difference Result 154 states and 323 transitions. [2019-12-27 15:08:56,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:56,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:56,838 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:08:56,838 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:08:56,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:08:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2019-12-27 15:08:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:08:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2019-12-27 15:08:56,841 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 13 [2019-12-27 15:08:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:56,841 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2019-12-27 15:08:56,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2019-12-27 15:08:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:56,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:56,842 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:57,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,045 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:57,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1063139135, now seen corresponding path program 107 times [2019-12-27 15:08:57,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:57,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211535578] [2019-12-27 15:08:57,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:57,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211535578] [2019-12-27 15:08:57,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772568292] [2019-12-27 15:08:57,109 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,150 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:57,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:57,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:57,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:57,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:57,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:57,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1171957917] [2019-12-27 15:08:57,255 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:57,256 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:57,257 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:57,257 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:57,257 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:57,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:57,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:57,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:57,258 INFO L87 Difference]: Start difference. First operand 112 states and 247 transitions. Second operand 9 states. [2019-12-27 15:08:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:57,442 INFO L93 Difference]: Finished difference Result 147 states and 310 transitions. [2019-12-27 15:08:57,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:57,443 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:57,443 INFO L225 Difference]: With dead ends: 147 [2019-12-27 15:08:57,444 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 15:08:57,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 15:08:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2019-12-27 15:08:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:57,447 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:57,447 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:57,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:57,447 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:57,447 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:57,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,648 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1063139228, now seen corresponding path program 108 times [2019-12-27 15:08:57,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:57,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184934678] [2019-12-27 15:08:57,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:57,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184934678] [2019-12-27 15:08:57,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067357361] [2019-12-27 15:08:57,722 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,761 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:57,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:57,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:57,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:57,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:57,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:57,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2044749372] [2019-12-27 15:08:57,881 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:57,882 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:57,883 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:57,883 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:57,884 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:57,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:57,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:57,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:57,884 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:08:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:58,134 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 15:08:58,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:58,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:58,135 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:08:58,135 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:08:58,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:08:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2019-12-27 15:08:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:08:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:08:58,138 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:08:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:58,138 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:08:58,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:08:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:58,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:58,139 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:58,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,340 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1063142018, now seen corresponding path program 109 times [2019-12-27 15:08:58,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:58,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280611791] [2019-12-27 15:08:58,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280611791] [2019-12-27 15:08:58,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145286025] [2019-12-27 15:08:58,426 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:58,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,027 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 15:08:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:59,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378958852] [2019-12-27 15:08:59,070 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,070 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,072 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:59,072 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,072 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:08:59,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:59,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:59,073 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:08:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:59,331 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2019-12-27 15:08:59,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:59,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:59,332 INFO L225 Difference]: With dead ends: 152 [2019-12-27 15:08:59,332 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 15:08:59,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 15:08:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2019-12-27 15:08:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:08:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:08:59,335 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:08:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:59,336 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:08:59,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:08:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:59,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:59,336 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:59,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,537 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1063142111, now seen corresponding path program 110 times [2019-12-27 15:08:59,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:59,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605202611] [2019-12-27 15:08:59,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605202611] [2019-12-27 15:08:59,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047090928] [2019-12-27 15:08:59,608 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:59,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:59,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:59,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:00,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:09:00,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [425087937] [2019-12-27 15:09:00,094 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:00,095 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:00,096 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:09:00,097 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:00,097 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:09:00,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:09:00,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:09:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:09:00,098 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:09:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:00,734 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 15:09:00,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:00,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:09:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:00,734 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:09:00,735 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:09:00,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=360, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:00,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:09:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-12-27 15:09:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 15:09:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 15:09:00,738 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 15:09:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:00,738 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 15:09:00,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:09:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 15:09:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:09:00,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:00,739 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:00,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,942 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228508, now seen corresponding path program 111 times [2019-12-27 15:09:00,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:00,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85575574] [2019-12-27 15:09:00,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:01,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85575574] [2019-12-27 15:09:01,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875870450] [2019-12-27 15:09:01,012 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:01,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:01,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:01,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 15:09:01,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:01,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:01,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:09:01,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966005768] [2019-12-27 15:09:01,160 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:01,160 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:01,162 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:09:01,162 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:01,162 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:09:01,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:09:01,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:09:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:09:01,163 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 15:09:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:01,355 INFO L93 Difference]: Finished difference Result 148 states and 311 transitions. [2019-12-27 15:09:01,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:09:01,355 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:09:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:01,356 INFO L225 Difference]: With dead ends: 148 [2019-12-27 15:09:01,356 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 15:09:01,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 15:09:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2019-12-27 15:09:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:09:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:09:01,360 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:09:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:01,361 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:09:01,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:09:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:09:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:09:01,361 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:01,362 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:01,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:01,565 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228601, now seen corresponding path program 112 times [2019-12-27 15:09:01,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:01,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696923184] [2019-12-27 15:09:01,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:01,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696923184] [2019-12-27 15:09:01,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338943258] [2019-12-27 15:09:01,638 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:01,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:01,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:01,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:09:01,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:02,503 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 15:09:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:02,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:02,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:09:02,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1284756947] [2019-12-27 15:09:02,505 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:02,505 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:02,507 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:09:02,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:02,511 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:09:02,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:09:02,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:02,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:09:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:09:02,512 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:09:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:02,797 INFO L93 Difference]: Finished difference Result 154 states and 323 transitions. [2019-12-27 15:09:02,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:02,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:09:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:02,798 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:09:02,799 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:09:02,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=397, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:09:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:09:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 114. [2019-12-27 15:09:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 15:09:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 15:09:02,802 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 15:09:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:02,802 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 15:09:02,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:09:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 15:09:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:09:02,803 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:02,803 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:03,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:03,004 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231391, now seen corresponding path program 113 times [2019-12-27 15:09:03,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:03,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426891612] [2019-12-27 15:09:03,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:03,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426891612] [2019-12-27 15:09:03,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713555923] [2019-12-27 15:09:03,081 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:03,124 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:03,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:03,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:09:03,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:03,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:03,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:09:03,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257333275] [2019-12-27 15:09:03,236 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:03,237 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:03,238 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:09:03,238 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:03,239 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:09:03,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:09:03,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:09:03,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:09:03,239 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 15:09:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:03,449 INFO L93 Difference]: Finished difference Result 144 states and 301 transitions. [2019-12-27 15:09:03,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:09:03,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:09:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:03,450 INFO L225 Difference]: With dead ends: 144 [2019-12-27 15:09:03,450 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 15:09:03,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 15:09:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2019-12-27 15:09:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:09:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 15:09:03,453 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 15:09:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:03,453 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 15:09:03,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:09:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 15:09:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:09:03,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:03,455 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:03,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:03,657 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231484, now seen corresponding path program 114 times [2019-12-27 15:09:03,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:03,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419174734] [2019-12-27 15:09:03,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:03,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419174734] [2019-12-27 15:09:03,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755811070] [2019-12-27 15:09:03,735 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:03,776 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:03,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:03,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:09:03,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:03,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:03,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:09:03,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [417701479] [2019-12-27 15:09:03,874 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:03,875 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:03,877 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:09:03,877 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:03,878 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:09:03,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:09:03,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:03,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:09:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:09:03,878 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 15:09:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:04,048 INFO L93 Difference]: Finished difference Result 137 states and 285 transitions. [2019-12-27 15:09:04,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:09:04,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:09:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:04,049 INFO L225 Difference]: With dead ends: 137 [2019-12-27 15:09:04,049 INFO L226 Difference]: Without dead ends: 136 [2019-12-27 15:09:04,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-27 15:09:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2019-12-27 15:09:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 15:09:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2019-12-27 15:09:04,052 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 13 [2019-12-27 15:09:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:04,052 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2019-12-27 15:09:04,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:09:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2019-12-27 15:09:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:09:04,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:04,053 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:04,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,256 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1765472381, now seen corresponding path program 7 times [2019-12-27 15:09:04,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:04,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436864382] [2019-12-27 15:09:04,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:04,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436864382] [2019-12-27 15:09:04,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574605365] [2019-12-27 15:09:04,329 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:04,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:04,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:04,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:04,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1103099869] [2019-12-27 15:09:04,480 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:04,481 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:04,482 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 15:09:04,482 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:04,482 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:04,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:04,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:04,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:04,483 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand 10 states. [2019-12-27 15:09:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:04,668 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2019-12-27 15:09:04,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:04,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 15:09:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:04,669 INFO L225 Difference]: With dead ends: 135 [2019-12-27 15:09:04,669 INFO L226 Difference]: Without dead ends: 134 [2019-12-27 15:09:04,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-27 15:09:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2019-12-27 15:09:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 15:09:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2019-12-27 15:09:04,672 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 13 [2019-12-27 15:09:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:04,673 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2019-12-27 15:09:04,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2019-12-27 15:09:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:04,673 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:04,673 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:04,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,874 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:04,875 INFO L82 PathProgramCache]: Analyzing trace with hash 689055580, now seen corresponding path program 8 times [2019-12-27 15:09:04,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:04,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339562668] [2019-12-27 15:09:04,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:04,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339562668] [2019-12-27 15:09:04,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342745196] [2019-12-27 15:09:04,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:05,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:05,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:05,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:09:05,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:05,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:05,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 15:09:05,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1535477128] [2019-12-27 15:09:05,155 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:05,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:05,158 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:09:05,159 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:05,159 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:05,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 15:09:05,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 15:09:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:09:05,159 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand 11 states. [2019-12-27 15:09:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:05,397 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-27 15:09:05,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:05,397 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 15:09:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:05,398 INFO L225 Difference]: With dead ends: 146 [2019-12-27 15:09:05,398 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 15:09:05,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2019-12-27 15:09:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 15:09:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2019-12-27 15:09:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:05,401 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:05,402 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:05,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 15:09:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:05,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:05,403 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:05,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:05,606 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash 663066358, now seen corresponding path program 115 times [2019-12-27 15:09:05,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:05,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764819403] [2019-12-27 15:09:05,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:05,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764819403] [2019-12-27 15:09:05,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590428399] [2019-12-27 15:09:05,684 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:05,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:05,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:05,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:05,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:05,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [856110739] [2019-12-27 15:09:05,917 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:05,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:05,925 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 56 transitions. [2019-12-27 15:09:05,925 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:05,925 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:05,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:05,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:05,926 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:06,292 INFO L93 Difference]: Finished difference Result 156 states and 333 transitions. [2019-12-27 15:09:06,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:06,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:06,294 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:09:06,294 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:09:06,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:09:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 124. [2019-12-27 15:09:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:06,299 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:06,299 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:06,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:06,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:06,300 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:06,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:06,504 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:06,505 INFO L82 PathProgramCache]: Analyzing trace with hash -117422285, now seen corresponding path program 116 times [2019-12-27 15:09:06,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:06,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767458374] [2019-12-27 15:09:06,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:06,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767458374] [2019-12-27 15:09:06,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026334381] [2019-12-27 15:09:06,604 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:06,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:06,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:06,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:06,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:06,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:06,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:06,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [253303583] [2019-12-27 15:09:06,793 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:06,794 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:06,797 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:09:06,797 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:06,798 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:06,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:06,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:06,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:06,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:06,798 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:07,042 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2019-12-27 15:09:07,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:07,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:07,044 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:09:07,044 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 15:09:07,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 15:09:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-27 15:09:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:07,047 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:07,047 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:07,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:07,048 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:07,048 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:07,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:07,249 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:07,249 INFO L82 PathProgramCache]: Analyzing trace with hash -117422192, now seen corresponding path program 117 times [2019-12-27 15:09:07,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:07,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528017161] [2019-12-27 15:09:07,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:07,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528017161] [2019-12-27 15:09:07,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985557894] [2019-12-27 15:09:07,331 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:07,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:07,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:07,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:07,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:07,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:07,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:07,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1983707615] [2019-12-27 15:09:07,932 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:07,933 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:07,936 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:09:07,936 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:07,936 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:07,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:07,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:07,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:07,937 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:08,650 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2019-12-27 15:09:08,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:08,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:08,651 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:09:08,652 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 15:09:08,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=427, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:09:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 15:09:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-27 15:09:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:08,655 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:08,656 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:08,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:08,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:08,656 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:08,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:08,857 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233558, now seen corresponding path program 118 times [2019-12-27 15:09:08,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:08,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991498128] [2019-12-27 15:09:08,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:08,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991498128] [2019-12-27 15:09:08,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622308739] [2019-12-27 15:09:08,959 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,011 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:09,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:09,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:09,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:09,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:09,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:09,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [131739528] [2019-12-27 15:09:09,151 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:09,152 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:09,155 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:09:09,155 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:09,155 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:09,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:09,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:09,156 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:09,387 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2019-12-27 15:09:09,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:09,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:09,388 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:09:09,388 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:09:09,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:09:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 15:09:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:09,391 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:09,391 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:09,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:09,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:09,392 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:09,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,593 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:09,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233651, now seen corresponding path program 119 times [2019-12-27 15:09:09,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:09,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126493517] [2019-12-27 15:09:09,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:09,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126493517] [2019-12-27 15:09:09,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220841967] [2019-12-27 15:09:09,676 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,719 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:09:09,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:09,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:09,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:10,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:10,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:10,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1033740060] [2019-12-27 15:09:10,270 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:10,271 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:10,274 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:09:10,274 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:10,274 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:10,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:10,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:10,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:10,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:10,275 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:10,549 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2019-12-27 15:09:10,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:10,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:10,550 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:09:10,550 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:09:10,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:09:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-12-27 15:09:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:09:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 15:09:10,553 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 15:09:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:10,553 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 15:09:10,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 15:09:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:10,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:10,554 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:10,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:10,756 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236441, now seen corresponding path program 120 times [2019-12-27 15:09:10,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:10,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831673344] [2019-12-27 15:09:10,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:10,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831673344] [2019-12-27 15:09:10,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479912454] [2019-12-27 15:09:10,870 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:10,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:10,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:10,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:10,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:12,766 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 15:09:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:12,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:12,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:12,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [487540073] [2019-12-27 15:09:12,807 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:12,809 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:12,811 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:09:12,812 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:12,812 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:12,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:12,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:12,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=232, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:09:12,812 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 15:09:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:13,561 INFO L93 Difference]: Finished difference Result 174 states and 372 transitions. [2019-12-27 15:09:13,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:13,562 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:13,563 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:09:13,563 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:09:13,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=168, Invalid=429, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:09:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:09:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2019-12-27 15:09:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:09:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 15:09:13,571 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 15:09:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:13,572 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 15:09:13,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 15:09:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:13,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:13,572 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:13,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:13,773 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236534, now seen corresponding path program 121 times [2019-12-27 15:09:13,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:13,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592186982] [2019-12-27 15:09:13,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:13,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592186982] [2019-12-27 15:09:13,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403816786] [2019-12-27 15:09:13,857 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:13,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:13,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:15,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:15,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:15,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [885257647] [2019-12-27 15:09:15,856 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:15,857 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:15,861 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:09:15,861 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:15,861 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:15,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:15,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:15,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:09:15,862 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 15:09:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:16,793 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2019-12-27 15:09:16,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:16,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:16,795 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:09:16,795 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:09:16,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=172, Invalid=425, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:09:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:09:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 15:09:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:16,798 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:16,798 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:16,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:16,799 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:16,799 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:16,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,000 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042861, now seen corresponding path program 122 times [2019-12-27 15:09:17,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:17,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936115476] [2019-12-27 15:09:17,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936115476] [2019-12-27 15:09:17,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139131157] [2019-12-27 15:09:17,078 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:17,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:17,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:17,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:17,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:17,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1828073981] [2019-12-27 15:09:17,250 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:17,251 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:17,254 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:17,254 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:17,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:17,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:17,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:17,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:17,255 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:17,481 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2019-12-27 15:09:17,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:17,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:17,483 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:09:17,483 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:09:17,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:09:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 15:09:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:17,486 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:17,487 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:17,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:17,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:17,487 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:17,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,688 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042768, now seen corresponding path program 123 times [2019-12-27 15:09:17,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:17,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158859792] [2019-12-27 15:09:17,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158859792] [2019-12-27 15:09:17,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87093880] [2019-12-27 15:09:17,781 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:17,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:17,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:17,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:18,321 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_420 Int)) (and (<= (div (+ (* v_~i~0_420 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 3 v_~i~0_420) 1)) (<= c_~i~0 (+ v_~i~0_420 c_~j~0)))) is different from true [2019-12-27 15:09:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:18,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:18,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:18,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [511926180] [2019-12-27 15:09:18,322 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:18,323 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:18,325 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:18,325 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:18,326 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:18,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:18,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=207, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:09:18,326 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:18,581 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 15:09:18,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:18,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:18,582 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:09:18,582 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:09:18,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=389, Unknown=1, NotChecked=44, Total=600 [2019-12-27 15:09:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:09:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2019-12-27 15:09:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:09:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:09:18,585 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:09:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:18,586 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:09:18,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:09:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:18,586 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:18,586 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:18,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:18,787 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039978, now seen corresponding path program 124 times [2019-12-27 15:09:18,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:18,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504897108] [2019-12-27 15:09:18,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:18,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504897108] [2019-12-27 15:09:18,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209385457] [2019-12-27 15:09:18,875 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:18,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:18,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:18,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:18,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:20,118 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_424 Int)) (and (<= (div (+ (* v_~i~0_424 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 3 v_~i~0_424) 1)) (<= c_~j~0 (+ (* 2 v_~i~0_424) c_~i~0 1)))) is different from true [2019-12-27 15:09:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:20,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:20,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:20,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [554707411] [2019-12-27 15:09:20,119 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:20,120 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:20,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:20,122 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:20,122 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:20,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:20,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=204, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:09:20,123 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:09:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:21,066 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 15:09:21,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:21,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:21,067 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:09:21,067 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:09:21,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=180, Invalid=422, Unknown=2, NotChecked=46, Total=650 [2019-12-27 15:09:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:09:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2019-12-27 15:09:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:09:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:09:21,071 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:09:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:21,075 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:09:21,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:09:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:21,076 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:21,076 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:21,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,277 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039885, now seen corresponding path program 125 times [2019-12-27 15:09:21,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:21,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080308789] [2019-12-27 15:09:21,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080308789] [2019-12-27 15:09:21,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429905563] [2019-12-27 15:09:21,364 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,406 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:21,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:21,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:21,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:22,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:22,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1805390239] [2019-12-27 15:09:22,996 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:22,997 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:22,999 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:23,000 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:23,000 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:23,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:23,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:23,000 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:09:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:24,044 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 15:09:24,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:24,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:24,045 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:09:24,045 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:09:24,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=172, Invalid=427, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:09:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:09:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 15:09:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:09:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 15:09:24,049 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 15:09:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:24,049 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 15:09:24,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 15:09:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:24,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:24,050 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:24,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,251 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953488, now seen corresponding path program 126 times [2019-12-27 15:09:24,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:24,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873455065] [2019-12-27 15:09:24,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:24,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873455065] [2019-12-27 15:09:24,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200132705] [2019-12-27 15:09:24,341 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:24,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:24,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:24,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:25,217 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 15:09:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:27,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:27,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:27,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [438438364] [2019-12-27 15:09:27,378 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:27,379 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:27,381 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:27,382 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:27,382 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:27,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:27,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:27,382 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 15:09:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:29,325 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2019-12-27 15:09:29,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:29,325 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:29,326 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:09:29,326 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:09:29,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=169, Invalid=429, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:09:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:09:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2019-12-27 15:09:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:09:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 15:09:29,329 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 15:09:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:29,330 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 15:09:29,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 15:09:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:29,330 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:29,330 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:29,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:29,531 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953395, now seen corresponding path program 127 times [2019-12-27 15:09:29,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:29,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544944497] [2019-12-27 15:09:29,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:29,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544944497] [2019-12-27 15:09:29,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430950706] [2019-12-27 15:09:29,619 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:29,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:29,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:32,487 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:09:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:32,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:32,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:32,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [966767440] [2019-12-27 15:09:32,489 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:32,489 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:32,492 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:32,492 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:32,492 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:32,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:32,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:32,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:32,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:32,492 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 15:09:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:35,386 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 15:09:35,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:35,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:35,387 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:09:35,387 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:09:35,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=171, Invalid=425, Unknown=4, NotChecked=0, Total=600 [2019-12-27 15:09:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:09:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 15:09:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:09:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:09:35,390 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:09:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:35,391 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:09:35,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:09:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:35,391 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:35,392 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:35,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:35,592 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:35,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950605, now seen corresponding path program 128 times [2019-12-27 15:09:35,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:35,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192660193] [2019-12-27 15:09:35,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:35,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192660193] [2019-12-27 15:09:35,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078083405] [2019-12-27 15:09:35,686 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:35,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:35,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:35,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:35,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:40,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:40,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:40,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2033874074] [2019-12-27 15:09:40,275 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:40,276 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:40,279 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:40,279 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:40,279 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:40,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:40,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:40,280 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:09:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:46,616 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 15:09:46,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:46,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:46,618 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:09:46,618 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:09:46,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=167, Invalid=430, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:09:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:09:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 15:09:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:09:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:09:46,621 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:09:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:46,621 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:09:46,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:09:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:46,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:46,622 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:46,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,825 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:46,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950512, now seen corresponding path program 129 times [2019-12-27 15:09:46,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:46,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039679442] [2019-12-27 15:09:46,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:46,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039679442] [2019-12-27 15:09:46,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981486121] [2019-12-27 15:09:46,913 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:46,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:46,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:46,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:48,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:48,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [256714177] [2019-12-27 15:09:48,542 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:48,543 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:48,545 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:09:48,545 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:48,546 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:48,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:48,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:09:48,546 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:09:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:49,737 INFO L93 Difference]: Finished difference Result 173 states and 374 transitions. [2019-12-27 15:09:49,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:49,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:49,738 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:09:49,738 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:09:49,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=172, Invalid=424, Unknown=4, NotChecked=0, Total=600 [2019-12-27 15:09:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:09:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 15:09:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:49,741 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:49,741 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:49,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:49,742 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:49,742 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:49,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,943 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash 147734070, now seen corresponding path program 130 times [2019-12-27 15:09:49,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:49,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469766276] [2019-12-27 15:09:49,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469766276] [2019-12-27 15:09:50,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565675797] [2019-12-27 15:09:50,027 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:50,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:50,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:50,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:50,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1138123839] [2019-12-27 15:09:50,223 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:50,224 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:50,226 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:09:50,226 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:50,226 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:50,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:50,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:50,227 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,450 INFO L93 Difference]: Finished difference Result 168 states and 357 transitions. [2019-12-27 15:09:50,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,451 INFO L225 Difference]: With dead ends: 168 [2019-12-27 15:09:50,451 INFO L226 Difference]: Without dead ends: 167 [2019-12-27 15:09:50,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-27 15:09:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2019-12-27 15:09:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:09:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:09:50,455 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:09:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,455 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:09:50,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:09:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,456 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,456 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,659 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash 147734163, now seen corresponding path program 131 times [2019-12-27 15:09:50,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500567929] [2019-12-27 15:09:50,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500567929] [2019-12-27 15:09:50,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465425178] [2019-12-27 15:09:50,749 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,794 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:50,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:50,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:50,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:50,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2080116648] [2019-12-27 15:09:50,977 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:50,978 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:50,980 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:09:50,980 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:50,980 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:50,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:50,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:50,980 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:09:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:51,266 INFO L93 Difference]: Finished difference Result 172 states and 370 transitions. [2019-12-27 15:09:51,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:51,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:51,267 INFO L225 Difference]: With dead ends: 172 [2019-12-27 15:09:51,268 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 15:09:51,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 15:09:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 127. [2019-12-27 15:09:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:09:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:09:51,271 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:09:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:51,271 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:09:51,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:09:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:51,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:51,272 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:51,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,473 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash 147736953, now seen corresponding path program 132 times [2019-12-27 15:09:51,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:51,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157098298] [2019-12-27 15:09:51,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157098298] [2019-12-27 15:09:51,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391096292] [2019-12-27 15:09:51,571 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,613 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:51,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:51,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:51,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:51,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:51,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [672886079] [2019-12-27 15:09:51,808 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:51,809 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:51,811 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:09:51,811 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:51,811 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:51,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:51,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:51,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:51,812 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:09:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:52,204 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 15:09:52,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:09:52,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:52,205 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:09:52,205 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:09:52,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:09:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:09:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 15:09:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:09:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:09:52,208 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:09:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:52,208 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:09:52,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:09:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:52,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:52,209 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:52,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:52,409 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 147737046, now seen corresponding path program 133 times [2019-12-27 15:09:52,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:52,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462207325] [2019-12-27 15:09:52,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:52,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462207325] [2019-12-27 15:09:52,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860077618] [2019-12-27 15:09:52,500 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:52,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:52,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:52,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:52,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:52,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1494271415] [2019-12-27 15:09:52,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:52,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:52,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:09:52,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:52,739 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:52,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:52,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:52,740 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:09:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:53,045 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 15:09:53,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:53,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:53,046 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:09:53,046 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:09:53,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:09:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:09:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2019-12-27 15:09:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:09:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:09:53,049 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:09:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:53,049 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:09:53,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:09:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:53,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:53,050 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:53,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:53,251 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash 147823443, now seen corresponding path program 134 times [2019-12-27 15:09:53,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:53,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676284585] [2019-12-27 15:09:53,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676284585] [2019-12-27 15:09:53,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048579986] [2019-12-27 15:09:53,342 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:53,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:53,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:53,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:53,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:53,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:53,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [901937437] [2019-12-27 15:09:53,616 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:53,617 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:53,619 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:09:53,619 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:53,619 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:53,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:53,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:53,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:53,620 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:09:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:54,018 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 15:09:54,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:54,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:54,020 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:09:54,020 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:09:54,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:09:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:09:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2019-12-27 15:09:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:09:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:09:54,023 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:09:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:54,023 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:09:54,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:09:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:54,023 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:54,024 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:54,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,227 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 147823536, now seen corresponding path program 135 times [2019-12-27 15:09:54,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:54,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751861420] [2019-12-27 15:09:54,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751861420] [2019-12-27 15:09:54,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920968282] [2019-12-27 15:09:54,340 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:54,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:54,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:54,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:54,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:54,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1773292407] [2019-12-27 15:09:54,819 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:54,821 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:54,826 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:09:54,826 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:54,826 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:54,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:54,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:54,827 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:09:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:55,217 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 15:09:55,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:55,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:55,219 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:09:55,219 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:09:55,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:09:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:09:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 15:09:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:09:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:09:55,221 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:09:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:55,222 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:09:55,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:09:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:55,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:55,223 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:55,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:55,426 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:55,426 INFO L82 PathProgramCache]: Analyzing trace with hash 147826326, now seen corresponding path program 136 times [2019-12-27 15:09:55,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:55,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448896867] [2019-12-27 15:09:55,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:55,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448896867] [2019-12-27 15:09:55,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501238162] [2019-12-27 15:09:55,516 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:55,557 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:55,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:55,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:55,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:01,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:01,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [692840040] [2019-12-27 15:10:01,829 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:01,830 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:01,833 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:01,833 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:01,833 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:01,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:01,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:01,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:01,834 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:10:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:04,219 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 15:10:04,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:04,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:04,221 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:10:04,221 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:10:04,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=176, Invalid=473, Unknown=1, NotChecked=0, Total=650 [2019-12-27 15:10:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:10:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 15:10:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:10:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:10:04,224 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:10:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:04,224 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:10:04,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:10:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:04,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:04,225 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:04,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:04,425 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 147826419, now seen corresponding path program 137 times [2019-12-27 15:10:04,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:04,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478877348] [2019-12-27 15:10:04,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478877348] [2019-12-27 15:10:04,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773980326] [2019-12-27 15:10:04,512 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:04,550 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:04,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:04,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:04,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:04,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:04,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2126056640] [2019-12-27 15:10:04,797 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:04,798 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:04,800 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:04,801 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:04,801 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:04,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:04,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:04,801 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:10:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:05,500 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 15:10:05,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:05,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:05,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:05,501 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:10:05,501 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:10:05,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=429, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:10:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:10:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 15:10:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:10:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 15:10:05,505 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 15:10:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:05,506 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 15:10:05,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 15:10:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:05,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:05,506 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,710 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash 150504633, now seen corresponding path program 138 times [2019-12-27 15:10:05,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307314590] [2019-12-27 15:10:05,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307314590] [2019-12-27 15:10:05,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659671857] [2019-12-27 15:10:05,798 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,840 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:10:05,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:05,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:05,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:06,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:06,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [168341109] [2019-12-27 15:10:06,059 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:06,060 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:06,063 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:06,063 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:06,063 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:06,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:06,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:06,064 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 15:10:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:06,434 INFO L93 Difference]: Finished difference Result 176 states and 374 transitions. [2019-12-27 15:10:06,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:06,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:06,436 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:10:06,436 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:10:06,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:10:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 15:10:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:10:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 15:10:06,443 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 15:10:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:06,443 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 15:10:06,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 15:10:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:06,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:06,445 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:06,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,650 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 150504726, now seen corresponding path program 139 times [2019-12-27 15:10:06,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:06,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874522422] [2019-12-27 15:10:06,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874522422] [2019-12-27 15:10:06,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419040641] [2019-12-27 15:10:06,743 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:06,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:21,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:21,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:21,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077505822] [2019-12-27 15:10:21,189 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:21,190 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:21,198 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:21,198 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:21,198 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:21,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:21,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:21,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:21,199 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 15:10:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:23,554 INFO L93 Difference]: Finished difference Result 179 states and 386 transitions. [2019-12-27 15:10:23,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:23,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:23,555 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:10:23,556 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:10:23,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=169, Invalid=428, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:10:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:10:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 127. [2019-12-27 15:10:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:10:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:10:23,559 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:10:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:23,559 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:10:23,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:10:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:23,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:23,559 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:23,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:23,760 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 150507516, now seen corresponding path program 140 times [2019-12-27 15:10:23,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:23,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244742558] [2019-12-27 15:10:23,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:23,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244742558] [2019-12-27 15:10:23,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542917729] [2019-12-27 15:10:23,847 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:23,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:23,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:23,889 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:23,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:24,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:24,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:24,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1853270066] [2019-12-27 15:10:24,259 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:24,260 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:24,262 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:24,262 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:24,262 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:24,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:24,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:24,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:24,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:24,263 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:10:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:24,584 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 15:10:24,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:24,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:24,585 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:10:24,585 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:10:24,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:10:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-27 15:10:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:10:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:10:24,588 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:10:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:24,589 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:10:24,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:10:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:24,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:24,589 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:24,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:24,790 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash 150507609, now seen corresponding path program 141 times [2019-12-27 15:10:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:24,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103461809] [2019-12-27 15:10:24,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:24,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103461809] [2019-12-27 15:10:24,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250125191] [2019-12-27 15:10:24,877 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:24,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:24,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:24,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:24,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:25,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:25,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:25,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [599293931] [2019-12-27 15:10:25,161 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:25,162 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:25,164 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:25,164 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:25,164 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:25,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:25,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:25,165 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:10:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:25,470 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 15:10:25,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:25,471 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:25,471 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:10:25,472 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:10:25,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:10:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 15:10:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:10:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:10:25,475 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:10:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:25,475 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:10:25,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:10:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:25,476 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:25,476 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:25,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:25,677 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash 150594006, now seen corresponding path program 142 times [2019-12-27 15:10:25,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:25,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752718735] [2019-12-27 15:10:25,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:25,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752718735] [2019-12-27 15:10:25,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337557092] [2019-12-27 15:10:25,766 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:25,814 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:25,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:25,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:25,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:36,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:36,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:36,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1795194202] [2019-12-27 15:10:36,135 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:36,136 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:36,139 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:36,139 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:36,139 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:36,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:36,140 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:10:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:43,225 INFO L93 Difference]: Finished difference Result 178 states and 382 transitions. [2019-12-27 15:10:43,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:43,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:43,227 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:10:43,227 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:10:43,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=165, Invalid=432, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:10:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:10:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 126. [2019-12-27 15:10:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:10:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 15:10:43,230 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 15:10:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:43,230 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 15:10:43,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 15:10:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:43,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:43,231 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:43,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:43,432 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash 150594099, now seen corresponding path program 143 times [2019-12-27 15:10:43,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:43,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591071149] [2019-12-27 15:10:43,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:43,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591071149] [2019-12-27 15:10:43,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073686669] [2019-12-27 15:10:43,520 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:43,560 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:43,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:43,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:43,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:48,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:48,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:48,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1908554738] [2019-12-27 15:10:48,015 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:48,016 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:48,018 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:48,018 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:48,018 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:48,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:48,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:48,018 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 15:10:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:50,534 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 15:10:50,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:50,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:50,535 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:10:50,535 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:10:50,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=163, Invalid=434, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:10:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:10:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2019-12-27 15:10:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:10:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:10:50,538 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:10:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:50,538 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:10:50,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:10:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:50,539 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:50,539 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:50,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:50,740 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash 150596889, now seen corresponding path program 144 times [2019-12-27 15:10:50,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:50,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671797881] [2019-12-27 15:10:50,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:50,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671797881] [2019-12-27 15:10:50,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368355733] [2019-12-27 15:10:50,833 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:50,875 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:50,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:50,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:50,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:55,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:55,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:55,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1513296570] [2019-12-27 15:10:55,159 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:55,159 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:55,161 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:55,162 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:55,162 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:55,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:55,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:55,162 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:10:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:55,526 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 15:10:55,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:55,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:55,527 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:10:55,527 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:10:55,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:10:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-27 15:10:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:10:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 15:10:55,531 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 15:10:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:55,531 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 15:10:55,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 15:10:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:55,532 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:55,532 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:55,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:55,733 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 150596982, now seen corresponding path program 145 times [2019-12-27 15:10:55,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:55,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347315864] [2019-12-27 15:10:55,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:55,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347315864] [2019-12-27 15:10:55,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800308568] [2019-12-27 15:10:55,942 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:56,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:56,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:56,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:56,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:56,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [878210778] [2019-12-27 15:10:56,428 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:56,429 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:56,432 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:56,432 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:56,432 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:56,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:56,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:56,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:56,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:56,433 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 15:10:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:56,743 INFO L93 Difference]: Finished difference Result 171 states and 369 transitions. [2019-12-27 15:10:56,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:56,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:56,744 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:10:56,744 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:10:56,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:10:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 124. [2019-12-27 15:10:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:10:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 15:10:56,747 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 15:10:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:56,747 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 15:10:56,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 15:10:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:56,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:56,748 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:56,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:56,948 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1087145971, now seen corresponding path program 146 times [2019-12-27 15:10:56,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:56,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036029636] [2019-12-27 15:10:56,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:57,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036029636] [2019-12-27 15:10:57,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713980397] [2019-12-27 15:10:57,064 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:57,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:57,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:57,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:57,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:57,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:57,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:57,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1445848227] [2019-12-27 15:10:57,337 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:57,339 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:57,342 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:10:57,343 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:57,343 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:57,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:57,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:57,344 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 15:10:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:57,584 INFO L93 Difference]: Finished difference Result 159 states and 336 transitions. [2019-12-27 15:10:57,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:57,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:57,585 INFO L225 Difference]: With dead ends: 159 [2019-12-27 15:10:57,585 INFO L226 Difference]: Without dead ends: 158 [2019-12-27 15:10:57,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-27 15:10:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2019-12-27 15:10:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:10:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 285 transitions. [2019-12-27 15:10:57,588 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 285 transitions. Word has length 14 [2019-12-27 15:10:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:57,588 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 285 transitions. [2019-12-27 15:10:57,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 285 transitions. [2019-12-27 15:10:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:57,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:57,589 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:57,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:57,790 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:57,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1087146064, now seen corresponding path program 147 times [2019-12-27 15:10:57,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:57,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49883624] [2019-12-27 15:10:57,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:57,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49883624] [2019-12-27 15:10:57,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630533665] [2019-12-27 15:10:57,883 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:57,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:57,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:57,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 15:10:57,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:58,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:58,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:58,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1307333237] [2019-12-27 15:10:58,054 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:58,055 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:58,057 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:10:58,057 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:58,058 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:58,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:58,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:58,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:58,058 INFO L87 Difference]: Start difference. First operand 127 states and 285 transitions. Second operand 10 states. [2019-12-27 15:10:58,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:58,327 INFO L93 Difference]: Finished difference Result 171 states and 363 transitions. [2019-12-27 15:10:58,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:58,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:58,329 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:10:58,329 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:10:58,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:58,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:10:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 131. [2019-12-27 15:10:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:10:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:10:58,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:10:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:58,331 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:10:58,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:10:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:58,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:58,332 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:58,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:58,533 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:58,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1087148854, now seen corresponding path program 148 times [2019-12-27 15:10:58,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:58,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354204930] [2019-12-27 15:10:58,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354204930] [2019-12-27 15:10:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107912385] [2019-12-27 15:10:58,622 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:58,664 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:58,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:58,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:58,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:58,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:58,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:58,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [3206602] [2019-12-27 15:10:58,859 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:58,860 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:58,874 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:10:58,874 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:58,875 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:58,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:58,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:58,875 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:10:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:59,646 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2019-12-27 15:10:59,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:10:59,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:59,647 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:10:59,647 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:10:59,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2019-12-27 15:10:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:10:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 15:10:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:10:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:10:59,650 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:10:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:59,651 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:10:59,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:10:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:59,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:59,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:59,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:59,855 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1087148947, now seen corresponding path program 149 times [2019-12-27 15:10:59,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:59,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802641760] [2019-12-27 15:10:59,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:59,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802641760] [2019-12-27 15:10:59,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045873754] [2019-12-27 15:10:59,941 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:59,985 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:59,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:59,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:59,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:00,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:00,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:00,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [667395821] [2019-12-27 15:11:00,128 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:00,128 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:00,131 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:00,131 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:00,132 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:00,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:00,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:00,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:00,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:00,132 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:00,394 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2019-12-27 15:11:00,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:00,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:00,395 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:00,395 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:11:00,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:11:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 15:11:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:00,399 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:00,400 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:00,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:00,400 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:00,400 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:00,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,604 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1087235344, now seen corresponding path program 150 times [2019-12-27 15:11:00,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:00,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434530108] [2019-12-27 15:11:00,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:00,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434530108] [2019-12-27 15:11:00,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821013894] [2019-12-27 15:11:00,696 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,740 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:00,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:00,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:00,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:02,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:02,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:02,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2103034429] [2019-12-27 15:11:02,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:02,750 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:02,753 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:02,753 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:02,753 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:02,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:02,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:02,754 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:04,210 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 15:11:04,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:04,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:04,212 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:11:04,212 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:11:04,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=195, Invalid=504, Unknown=3, NotChecked=0, Total=702 [2019-12-27 15:11:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:11:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2019-12-27 15:11:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:04,215 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:04,217 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:04,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:04,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:04,218 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:04,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:04,419 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1087235437, now seen corresponding path program 151 times [2019-12-27 15:11:04,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:04,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408742698] [2019-12-27 15:11:04,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:04,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408742698] [2019-12-27 15:11:04,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264666227] [2019-12-27 15:11:04,511 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:04,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:04,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:08,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:08,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:08,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1958518836] [2019-12-27 15:11:08,788 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:08,789 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:08,790 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:08,791 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:08,791 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:08,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:08,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:08,791 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:11,408 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 15:11:11,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:11,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:11,409 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:11:11,409 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:11:11,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=193, Invalid=505, Unknown=4, NotChecked=0, Total=702 [2019-12-27 15:11:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:11:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 15:11:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:11,412 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:11,412 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:11,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:11,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:11,413 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:11,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:11,613 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238227, now seen corresponding path program 152 times [2019-12-27 15:11:11,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:11,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748590899] [2019-12-27 15:11:11,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:11,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748590899] [2019-12-27 15:11:11,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462525079] [2019-12-27 15:11:11,707 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:11,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:11,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:11,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:11,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:13,651 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:11:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:13,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:13,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:13,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [978065826] [2019-12-27 15:11:13,653 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:13,660 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:13,662 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:13,662 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:13,662 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:13,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:13,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:13,662 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:15,477 INFO L93 Difference]: Finished difference Result 183 states and 390 transitions. [2019-12-27 15:11:15,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:15,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:15,479 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:11:15,479 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:15,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=193, Invalid=506, Unknown=3, NotChecked=0, Total=702 [2019-12-27 15:11:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2019-12-27 15:11:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:15,482 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:15,482 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:15,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:15,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:15,483 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:15,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:15,683 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238320, now seen corresponding path program 153 times [2019-12-27 15:11:15,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:15,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331764477] [2019-12-27 15:11:15,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:15,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331764477] [2019-12-27 15:11:15,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250464907] [2019-12-27 15:11:15,772 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:15,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:15,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:15,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:15,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:15,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:15,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:15,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1482548649] [2019-12-27 15:11:15,987 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:15,988 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:15,990 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:15,990 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:15,990 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:15,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:15,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:15,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:15,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:15,990 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:16,229 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 15:11:16,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:16,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:16,230 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:11:16,230 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:11:16,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:11:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2019-12-27 15:11:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 15:11:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 15:11:16,234 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 15:11:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:16,235 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 15:11:16,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 15:11:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:16,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:16,235 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:16,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:16,437 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:16,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916534, now seen corresponding path program 154 times [2019-12-27 15:11:16,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:16,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132524842] [2019-12-27 15:11:16,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:16,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132524842] [2019-12-27 15:11:16,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049245480] [2019-12-27 15:11:16,532 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:16,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:16,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:16,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:16,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:19,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:19,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:19,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1127920500] [2019-12-27 15:11:19,272 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:19,272 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:19,275 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:19,275 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:19,275 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:19,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:19,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:19,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:11:19,276 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 15:11:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:21,309 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2019-12-27 15:11:21,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:21,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:21,310 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:11:21,310 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:11:21,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=182, Invalid=462, Unknown=6, NotChecked=0, Total=650 [2019-12-27 15:11:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:11:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 129. [2019-12-27 15:11:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 15:11:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 15:11:21,314 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 15:11:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:21,314 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 15:11:21,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 15:11:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:21,315 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:21,315 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:21,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:21,518 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916627, now seen corresponding path program 155 times [2019-12-27 15:11:21,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:21,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439849523] [2019-12-27 15:11:21,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:21,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439849523] [2019-12-27 15:11:21,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393875069] [2019-12-27 15:11:21,623 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:21,664 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:21,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:21,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:21,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:24,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:24,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:24,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [148854593] [2019-12-27 15:11:24,887 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:24,887 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:24,890 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:24,890 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:24,890 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:24,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:24,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:11:24,891 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 15:11:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:27,549 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 15:11:27,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:27,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:27,550 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:27,550 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:11:27,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=176, Invalid=471, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:11:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:11:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 15:11:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:27,553 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:27,554 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:27,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:27,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:27,554 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:27,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:27,755 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919417, now seen corresponding path program 156 times [2019-12-27 15:11:27,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:27,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599364571] [2019-12-27 15:11:27,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:27,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599364571] [2019-12-27 15:11:27,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151760320] [2019-12-27 15:11:27,848 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:27,890 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:27,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:27,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:27,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:29,535 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:11:29,993 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 15:11:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:29,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:29,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:29,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2070777610] [2019-12-27 15:11:29,995 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:29,995 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:29,997 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:29,997 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:29,997 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:29,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:29,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=227, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:11:29,998 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:30,348 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 15:11:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:30,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:30,350 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:11:30,350 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:11:30,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=180, Invalid=468, Unknown=2, NotChecked=0, Total=650 [2019-12-27 15:11:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:11:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 15:11:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:30,354 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:30,354 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:30,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:30,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:30,355 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:30,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,558 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919510, now seen corresponding path program 157 times [2019-12-27 15:11:30,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:30,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96645962] [2019-12-27 15:11:30,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96645962] [2019-12-27 15:11:30,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418979952] [2019-12-27 15:11:30,653 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:30,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:30,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:31,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:31,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:31,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [922914003] [2019-12-27 15:11:31,900 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:31,901 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:31,902 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:31,903 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:31,903 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:31,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:31,903 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:33,216 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 15:11:33,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:33,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:33,218 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:33,218 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:11:33,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=181, Invalid=467, Unknown=2, NotChecked=0, Total=650 [2019-12-27 15:11:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:11:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 15:11:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:33,221 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:33,221 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:33,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:33,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:33,222 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:33,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:33,422 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1090005907, now seen corresponding path program 158 times [2019-12-27 15:11:33,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:33,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466573412] [2019-12-27 15:11:33,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:33,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466573412] [2019-12-27 15:11:33,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832569331] [2019-12-27 15:11:33,513 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:33,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:33,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:33,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:33,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:34,108 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_511 Int)) (and (<= (div (+ (* v_~j~0_511 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ (* 2 v_~j~0_511) 2)) (<= c_~j~0 (+ c_~i~0 v_~j~0_511)))) is different from true [2019-12-27 15:11:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 15:11:34,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:34,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:34,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243563284] [2019-12-27 15:11:34,151 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:34,152 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:34,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:34,153 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:34,154 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:34,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:34,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=206, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:11:34,154 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:34,474 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-27 15:11:34,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:34,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:34,475 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:11:34,475 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:11:34,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=426, Unknown=1, NotChecked=46, Total=650 [2019-12-27 15:11:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:11:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 130. [2019-12-27 15:11:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:34,478 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:34,478 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:34,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:34,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:34,479 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:34,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:34,679 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1090006000, now seen corresponding path program 159 times [2019-12-27 15:11:34,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:34,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479079886] [2019-12-27 15:11:34,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:34,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479079886] [2019-12-27 15:11:34,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048480771] [2019-12-27 15:11:34,767 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:34,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:34,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:34,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:11:34,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:35,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:35,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:35,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [15251952] [2019-12-27 15:11:35,927 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:35,928 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:35,930 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:35,930 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:35,930 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:35,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:35,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:35,930 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:36,312 INFO L93 Difference]: Finished difference Result 183 states and 393 transitions. [2019-12-27 15:11:36,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:36,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:36,313 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:11:36,314 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:36,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:11:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2019-12-27 15:11:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:36,317 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:36,317 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:36,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:36,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:36,318 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:36,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:36,519 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1090008790, now seen corresponding path program 160 times [2019-12-27 15:11:36,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:36,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613625582] [2019-12-27 15:11:36,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:36,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613625582] [2019-12-27 15:11:36,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786722200] [2019-12-27 15:11:36,604 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:36,644 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:36,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:36,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:36,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:36,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:36,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:36,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1835540042] [2019-12-27 15:11:36,818 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:36,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:36,820 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:36,820 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:36,820 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:36,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:36,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:36,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:36,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:36,821 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:37,133 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 15:11:37,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:37,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:37,134 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:11:37,134 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:11:37,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:11:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 15:11:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:37,138 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:37,138 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:37,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:37,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:37,139 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:37,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:37,342 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1090008883, now seen corresponding path program 161 times [2019-12-27 15:11:37,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:37,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074242244] [2019-12-27 15:11:37,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:37,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074242244] [2019-12-27 15:11:37,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712955710] [2019-12-27 15:11:37,431 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:37,477 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:11:37,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:37,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:37,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:37,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:37,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:37,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [669299396] [2019-12-27 15:11:37,613 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:37,614 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:37,616 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:37,616 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:37,616 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:37,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:37,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:37,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:37,617 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:37,844 INFO L93 Difference]: Finished difference Result 176 states and 377 transitions. [2019-12-27 15:11:37,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:37,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:37,845 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:11:37,845 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:11:37,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:11:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-27 15:11:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:11:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 15:11:37,848 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 15:11:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:37,848 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 15:11:37,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 15:11:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:37,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:37,849 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:38,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,050 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033424, now seen corresponding path program 162 times [2019-12-27 15:11:38,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:38,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037416065] [2019-12-27 15:11:38,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037416065] [2019-12-27 15:11:38,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94575791] [2019-12-27 15:11:38,140 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,179 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:38,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:38,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:38,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:38,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:38,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1635931631] [2019-12-27 15:11:38,294 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:38,295 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:38,297 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:38,297 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:38,297 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:38,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:38,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:38,298 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 15:11:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:38,524 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 15:11:38,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:38,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:38,525 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:11:38,525 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:11:38,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:11:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-27 15:11:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:11:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 15:11:38,528 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 15:11:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:38,529 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 15:11:38,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 15:11:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:38,529 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:38,529 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:38,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,730 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033517, now seen corresponding path program 163 times [2019-12-27 15:11:38,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:38,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770028682] [2019-12-27 15:11:38,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770028682] [2019-12-27 15:11:38,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345203608] [2019-12-27 15:11:38,815 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:38,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:38,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:38,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [243220050] [2019-12-27 15:11:38,989 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:38,990 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:38,992 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:38,992 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:38,992 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:38,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:38,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:38,993 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 15:11:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:39,263 INFO L93 Difference]: Finished difference Result 176 states and 383 transitions. [2019-12-27 15:11:39,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:39,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:39,264 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:11:39,264 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:11:39,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:11:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 131. [2019-12-27 15:11:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:39,268 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:39,268 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:39,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:39,268 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:39,268 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:39,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,469 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036307, now seen corresponding path program 164 times [2019-12-27 15:11:39,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:39,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248965018] [2019-12-27 15:11:39,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:39,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248965018] [2019-12-27 15:11:39,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134484732] [2019-12-27 15:11:39,610 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:39,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:39,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:39,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:41,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:41,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [107707865] [2019-12-27 15:11:41,508 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:41,509 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:41,511 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:41,511 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:41,511 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:41,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:41,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=228, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:11:41,511 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,191 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2019-12-27 15:11:42,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,192 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:11:42,192 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:11:42,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=162, Invalid=435, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:11:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2019-12-27 15:11:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:42,196 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,196 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:42,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,197 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,400 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036400, now seen corresponding path program 165 times [2019-12-27 15:11:42,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:42,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143368966] [2019-12-27 15:11:42,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143368966] [2019-12-27 15:11:42,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757646078] [2019-12-27 15:11:42,498 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:42,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:42,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:42,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:42,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:42,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879333465] [2019-12-27 15:11:42,669 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:42,670 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:42,672 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:42,672 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:42,672 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:42,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:42,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:42,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:42,673 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,938 INFO L93 Difference]: Finished difference Result 176 states and 383 transitions. [2019-12-27 15:11:42,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,939 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:11:42,939 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:11:42,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:11:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 130. [2019-12-27 15:11:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:42,942 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,942 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:42,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,943 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,146 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122797, now seen corresponding path program 166 times [2019-12-27 15:11:43,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024726905] [2019-12-27 15:11:43,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024726905] [2019-12-27 15:11:43,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722019566] [2019-12-27 15:11:43,235 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,277 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:43,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,278 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:43,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:43,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1186434496] [2019-12-27 15:11:43,398 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:43,398 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:43,400 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:43,400 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:43,400 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:43,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:43,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:43,401 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:43,646 INFO L93 Difference]: Finished difference Result 179 states and 386 transitions. [2019-12-27 15:11:43,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:43,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:43,647 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:11:43,647 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:11:43,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:11:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2019-12-27 15:11:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:43,650 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:43,650 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:43,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:43,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:43,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,852 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122890, now seen corresponding path program 167 times [2019-12-27 15:11:43,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230613909] [2019-12-27 15:11:43,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230613909] [2019-12-27 15:11:43,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306880877] [2019-12-27 15:11:43,941 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,983 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:43,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1824490381] [2019-12-27 15:11:44,148 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,149 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,151 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:44,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,151 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:44,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,152 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:44,497 INFO L93 Difference]: Finished difference Result 172 states and 376 transitions. [2019-12-27 15:11:44,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:44,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:44,498 INFO L225 Difference]: With dead ends: 172 [2019-12-27 15:11:44,499 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 15:11:44,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 15:11:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2019-12-27 15:11:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:44,503 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:44,503 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:44,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:44,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:44,504 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:44,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,708 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125680, now seen corresponding path program 168 times [2019-12-27 15:11:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:44,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589383288] [2019-12-27 15:11:44,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589383288] [2019-12-27 15:11:44,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262210817] [2019-12-27 15:11:44,803 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,846 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:44,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:44,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737882117] [2019-12-27 15:11:44,968 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,969 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,971 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:44,971 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,971 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:44,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,972 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:45,250 INFO L93 Difference]: Finished difference Result 175 states and 379 transitions. [2019-12-27 15:11:45,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:45,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:45,251 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:11:45,251 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:11:45,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:11:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2019-12-27 15:11:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:45,254 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:45,255 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:45,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:45,255 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:45,255 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:45,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:45,456 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125773, now seen corresponding path program 169 times [2019-12-27 15:11:45,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:45,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331852904] [2019-12-27 15:11:45,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:45,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331852904] [2019-12-27 15:11:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842940796] [2019-12-27 15:11:45,581 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:45,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:45,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:45,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:45,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:45,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [336217239] [2019-12-27 15:11:45,827 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:45,828 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:45,830 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:45,830 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:45,831 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:45,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:45,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:45,831 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:46,074 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 15:11:46,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:46,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:46,075 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:11:46,075 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:11:46,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:11:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 129. [2019-12-27 15:11:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 15:11:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 15:11:46,078 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 15:11:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:46,079 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 15:11:46,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 15:11:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:46,079 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:46,079 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:46,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,280 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1175803987, now seen corresponding path program 170 times [2019-12-27 15:11:46,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:46,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020053636] [2019-12-27 15:11:46,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020053636] [2019-12-27 15:11:46,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443699889] [2019-12-27 15:11:46,366 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:46,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:46,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:46,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:46,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:46,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843572896] [2019-12-27 15:11:46,575 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:46,576 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:46,578 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:46,579 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:46,579 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:46,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:46,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:46,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:46,579 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 15:11:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:46,825 INFO L93 Difference]: Finished difference Result 182 states and 389 transitions. [2019-12-27 15:11:46,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:46,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:46,826 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:11:46,826 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:11:46,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:11:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 129. [2019-12-27 15:11:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 15:11:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 15:11:46,831 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 15:11:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:46,831 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 15:11:46,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 15:11:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:46,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:46,832 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:47,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,035 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:47,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1175804080, now seen corresponding path program 171 times [2019-12-27 15:11:47,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:47,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395735410] [2019-12-27 15:11:47,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395735410] [2019-12-27 15:11:47,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203548870] [2019-12-27 15:11:47,137 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:47,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:47,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:11:47,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:47,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:47,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1789705882] [2019-12-27 15:11:47,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:47,320 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:47,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:47,322 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:47,322 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:47,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:47,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:47,323 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 15:11:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:47,623 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 15:11:47,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:47,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:47,625 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:47,625 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:11:47,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:11:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 15:11:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:47,627 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:47,628 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:47,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:47,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:47,628 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:47,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,829 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:47,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:47,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1175806870, now seen corresponding path program 172 times [2019-12-27 15:11:47,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:47,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770788108] [2019-12-27 15:11:47,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770788108] [2019-12-27 15:11:47,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145992085] [2019-12-27 15:11:47,923 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,965 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:47,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:47,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:47,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:50,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:50,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:50,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1550115588] [2019-12-27 15:11:50,061 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:50,062 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:50,064 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:50,064 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:50,064 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:50,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:50,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:50,065 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:51,971 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 15:11:51,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:51,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:51,972 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:51,972 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:11:51,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=164, Invalid=433, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:11:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 15:11:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:51,976 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:51,976 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:51,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:51,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:51,977 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:52,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,177 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1175806963, now seen corresponding path program 173 times [2019-12-27 15:11:52,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:52,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010057725] [2019-12-27 15:11:52,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:52,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010057725] [2019-12-27 15:11:52,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555354496] [2019-12-27 15:11:52,264 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,306 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:52,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:52,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:52,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:53,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:53,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1312441554] [2019-12-27 15:11:53,034 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:53,035 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:53,037 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:53,037 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:53,037 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:53,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:53,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:53,038 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:54,274 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 15:11:54,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:54,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:54,275 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:54,275 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:11:54,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=432, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:11:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 15:11:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:54,279 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:54,280 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:54,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:54,280 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:54,280 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:54,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,484 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:54,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893360, now seen corresponding path program 174 times [2019-12-27 15:11:54,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:54,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820342984] [2019-12-27 15:11:54,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:54,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820342984] [2019-12-27 15:11:54,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570256278] [2019-12-27 15:11:54,572 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,618 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:54,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:54,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:54,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:54,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:54,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:54,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726691225] [2019-12-27 15:11:54,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:54,751 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:54,753 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:54,753 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:54,753 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:54,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:54,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:54,754 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:55,025 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 15:11:55,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:55,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:55,026 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:11:55,026 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:11:55,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:11:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 130. [2019-12-27 15:11:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 15:11:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 15:11:55,029 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 15:11:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:55,029 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 15:11:55,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 15:11:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:55,030 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:55,030 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:55,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:55,231 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893453, now seen corresponding path program 175 times [2019-12-27 15:11:55,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:55,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513715583] [2019-12-27 15:11:55,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:55,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513715583] [2019-12-27 15:11:55,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419449197] [2019-12-27 15:11:55,323 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:55,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:55,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:56,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:56,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:56,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2114214407] [2019-12-27 15:11:56,311 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:56,312 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:56,314 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:56,314 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:56,314 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:56,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:56,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:56,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:56,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:56,318 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 15:11:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:56,732 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2019-12-27 15:11:56,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:56,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:56,734 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:11:56,734 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:11:56,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:11:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2019-12-27 15:11:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:56,736 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:56,737 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:56,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:56,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:56,737 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:56,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:56,940 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896243, now seen corresponding path program 176 times [2019-12-27 15:11:56,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:56,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13311156] [2019-12-27 15:11:56,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:57,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13311156] [2019-12-27 15:11:57,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483156816] [2019-12-27 15:11:57,055 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:57,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:57,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:57,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:57,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:57,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:57,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [218974550] [2019-12-27 15:11:57,219 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:57,220 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:57,222 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:57,222 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:57,222 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:57,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:57,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:57,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:57,223 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:57,495 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 15:11:57,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:57,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:57,496 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:11:57,496 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:11:57,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:11:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 131. [2019-12-27 15:11:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 15:11:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 15:11:57,501 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 15:11:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:57,501 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 15:11:57,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 15:11:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:57,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:57,502 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:57,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,705 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896336, now seen corresponding path program 177 times [2019-12-27 15:11:57,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:57,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171274414] [2019-12-27 15:11:57,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:57,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171274414] [2019-12-27 15:11:57,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009600442] [2019-12-27 15:11:57,786 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:57,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:57,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:57,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:57,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:57,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:57,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [594022542] [2019-12-27 15:11:57,949 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:57,950 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:57,951 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:57,952 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:57,952 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:11:57,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:57,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:57,952 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 15:11:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:58,167 INFO L93 Difference]: Finished difference Result 167 states and 359 transitions. [2019-12-27 15:11:58,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:58,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:58,168 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:11:58,168 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 15:11:58,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 15:11:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 128. [2019-12-27 15:11:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:11:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 15:11:58,173 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 15:11:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:58,173 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 15:11:58,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 15:11:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:58,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:58,174 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:58,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:58,377 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 144143923, now seen corresponding path program 178 times [2019-12-27 15:11:58,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:58,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570147033] [2019-12-27 15:11:58,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:58,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570147033] [2019-12-27 15:11:58,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274347008] [2019-12-27 15:11:58,473 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:58,523 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:58,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:58,524 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:58,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:58,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:58,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:58,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [71727883] [2019-12-27 15:11:58,667 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:58,668 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:58,670 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:58,670 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:58,672 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:58,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:58,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:58,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:58,672 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 15:11:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:58,912 INFO L93 Difference]: Finished difference Result 160 states and 340 transitions. [2019-12-27 15:11:58,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:58,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:58,913 INFO L225 Difference]: With dead ends: 160 [2019-12-27 15:11:58,913 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:11:58,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:11:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2019-12-27 15:11:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:11:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 285 transitions. [2019-12-27 15:11:58,916 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 285 transitions. Word has length 14 [2019-12-27 15:11:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:58,916 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 285 transitions. [2019-12-27 15:11:58,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 285 transitions. [2019-12-27 15:11:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:58,917 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:58,917 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:59,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:59,118 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash 144146713, now seen corresponding path program 179 times [2019-12-27 15:11:59,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:59,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902288827] [2019-12-27 15:11:59,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:59,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902288827] [2019-12-27 15:11:59,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306541882] [2019-12-27 15:11:59,215 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:59,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:59,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:59,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:59,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:59,857 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_580 Int)) (and (<= (div (+ (* v_~j~0_580 (- 1)) 1) (- 5)) 1) (<= c_~i~0 (+ v_~j~0_580 1)) (<= c_~j~0 (+ v_~j~0_580 c_~i~0)))) is different from true [2019-12-27 15:11:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:59,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:59,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:59,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261428076] [2019-12-27 15:11:59,858 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:59,859 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:59,861 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:11:59,862 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:59,863 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 15:11:59,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:59,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:59,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=207, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:11:59,869 INFO L87 Difference]: Start difference. First operand 127 states and 285 transitions. Second operand 10 states. [2019-12-27 15:12:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:00,146 INFO L93 Difference]: Finished difference Result 171 states and 360 transitions. [2019-12-27 15:12:00,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:00,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:00,147 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:12:00,147 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:12:00,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=389, Unknown=1, NotChecked=44, Total=600 [2019-12-27 15:12:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:12:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2019-12-27 15:12:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:12:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 15:12:00,150 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 15:12:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:00,151 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 15:12:00,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 15:12:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:00,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:00,151 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:00,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,352 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 144146806, now seen corresponding path program 180 times [2019-12-27 15:12:00,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:00,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257285757] [2019-12-27 15:12:00,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:00,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257285757] [2019-12-27 15:12:00,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193952313] [2019-12-27 15:12:00,439 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,485 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:12:00,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:00,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:00,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:00,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:00,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:12:00,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807814238] [2019-12-27 15:12:00,622 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:00,623 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:00,626 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:12:00,626 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:00,627 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 15:12:00,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:00,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:00,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:12:00,628 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 15:12:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:00,888 INFO L93 Difference]: Finished difference Result 169 states and 358 transitions. [2019-12-27 15:12:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:00,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:00,889 INFO L225 Difference]: With dead ends: 169 [2019-12-27 15:12:00,889 INFO L226 Difference]: Without dead ends: 168 [2019-12-27 15:12:00,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:12:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-27 15:12:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2019-12-27 15:12:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:12:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 281 transitions. [2019-12-27 15:12:00,893 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 281 transitions. Word has length 14 [2019-12-27 15:12:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:00,893 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 281 transitions. [2019-12-27 15:12:00,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 281 transitions. [2019-12-27 15:12:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:00,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:00,894 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:01,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:01,094 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash 144233203, now seen corresponding path program 181 times [2019-12-27 15:12:01,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:01,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443190834] [2019-12-27 15:12:01,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:01,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443190834] [2019-12-27 15:12:01,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251977989] [2019-12-27 15:12:01,186 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:01,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:01,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:02,272 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_590 Int)) (and (<= c_~j~0 (+ v_~j~0_590 c_~i~0)) (<= c_~i~0 (+ v_~j~0_590 1)) (<= (div (+ (* v_~j~0_590 (- 1)) 1) (- 4)) 1))) is different from true [2019-12-27 15:12:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2019-12-27 15:12:03,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:03,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:12:03,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [941578179] [2019-12-27 15:12:03,193 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:03,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:03,196 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:12:03,196 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:03,197 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:12:03,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:03,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:03,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=204, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:12:03,198 INFO L87 Difference]: Start difference. First operand 126 states and 281 transitions. Second operand 10 states. [2019-12-27 15:12:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:04,073 INFO L93 Difference]: Finished difference Result 177 states and 372 transitions. [2019-12-27 15:12:04,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:04,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:04,074 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:12:04,074 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:12:04,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=167, Invalid=386, Unknown=3, NotChecked=44, Total=600 [2019-12-27 15:12:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:12:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 128. [2019-12-27 15:12:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:12:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 15:12:04,077 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 15:12:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:04,078 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 15:12:04,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 15:12:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:04,078 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:04,078 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:04,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:04,280 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash 144233296, now seen corresponding path program 182 times [2019-12-27 15:12:04,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:04,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199807743] [2019-12-27 15:12:04,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:04,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199807743] [2019-12-27 15:12:04,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106665375] [2019-12-27 15:12:04,374 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:04,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:04,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:04,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:04,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:05,445 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_596 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~j~0_596 1)) (<= (div (+ (* v_~j~0_596 (- 1)) 1) (- 4)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_596) 1)))) is different from true [2019-12-27 15:12:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:05,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:05,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:12:05,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1231637883] [2019-12-27 15:12:05,446 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:05,447 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:05,449 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:12:05,449 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:05,450 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:12:05,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:05,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=202, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:12:05,450 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 15:12:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:05,890 INFO L93 Difference]: Finished difference Result 178 states and 376 transitions. [2019-12-27 15:12:05,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:05,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:05,896 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:12:05,896 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:12:05,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=386, Unknown=2, NotChecked=44, Total=600 [2019-12-27 15:12:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:12:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 127. [2019-12-27 15:12:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:12:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 285 transitions. [2019-12-27 15:12:05,898 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 285 transitions. Word has length 14 [2019-12-27 15:12:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:05,898 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 285 transitions. [2019-12-27 15:12:05,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 285 transitions. [2019-12-27 15:12:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:05,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:05,899 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:06,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:06,100 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:06,100 INFO L82 PathProgramCache]: Analyzing trace with hash 144236086, now seen corresponding path program 183 times [2019-12-27 15:12:06,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:06,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357268844] [2019-12-27 15:12:06,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:06,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357268844] [2019-12-27 15:12:06,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751985485] [2019-12-27 15:12:06,185 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:06,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:12:06,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:06,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:06,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:06,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:06,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:12:06,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957782620] [2019-12-27 15:12:06,822 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:06,823 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:06,825 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:12:06,825 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:06,826 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:12:06,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:06,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:12:06,827 INFO L87 Difference]: Start difference. First operand 127 states and 285 transitions. Second operand 10 states. [2019-12-27 15:12:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:07,545 INFO L93 Difference]: Finished difference Result 179 states and 377 transitions. [2019-12-27 15:12:07,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:07,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:07,546 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:12:07,546 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:12:07,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=427, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:12:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:12:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-27 15:12:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:12:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 15:12:07,550 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 15:12:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:07,550 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 15:12:07,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 15:12:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:07,550 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:07,550 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:07,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:07,751 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 144236179, now seen corresponding path program 184 times [2019-12-27 15:12:07,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:07,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034173376] [2019-12-27 15:12:07,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:07,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034173376] [2019-12-27 15:12:07,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891337298] [2019-12-27 15:12:07,833 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:07,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:07,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:07,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:07,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:08,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:08,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:12:08,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1230962112] [2019-12-27 15:12:08,019 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:08,020 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:08,022 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:12:08,022 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:08,023 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:12:08,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:08,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:08,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:08,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:12:08,024 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. Received shutdown request... [2019-12-27 15:12:08,219 WARN L209 SmtUtils]: Removed 2 from assertion stack [2019-12-27 15:12:08,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:08,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:08,420 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 15:12:08,424 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 15:12:08,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:12:08 BasicIcfg [2019-12-27 15:12:08,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:12:08,425 INFO L168 Benchmark]: Toolchain (without parser) took 293659.51 ms. Allocated memory was 137.9 MB in the beginning and 167.8 MB in the end (delta: 29.9 MB). Free memory was 101.8 MB in the beginning and 136.5 MB in the end (delta: -34.8 MB). Peak memory consumption was 58.5 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,425 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.48 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 161.2 MB in the end (delta: -59.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,426 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.68 ms. Allocated memory is still 201.9 MB. Free memory was 161.2 MB in the beginning and 159.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,426 INFO L168 Benchmark]: Boogie Preprocessor took 26.56 ms. Allocated memory is still 201.9 MB. Free memory was 159.2 MB in the beginning and 157.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,426 INFO L168 Benchmark]: RCFGBuilder took 423.71 ms. Allocated memory is still 201.9 MB. Free memory was 157.8 MB in the beginning and 138.3 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,427 INFO L168 Benchmark]: TraceAbstraction took 292514.23 ms. Allocated memory was 201.9 MB in the beginning and 167.8 MB in the end (delta: -34.1 MB). Free memory was 137.6 MB in the beginning and 136.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:08,428 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 642.48 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 161.2 MB in the end (delta: -59.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.68 ms. Allocated memory is still 201.9 MB. Free memory was 161.2 MB in the beginning and 159.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.56 ms. Allocated memory is still 201.9 MB. Free memory was 159.2 MB in the beginning and 157.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 423.71 ms. Allocated memory is still 201.9 MB. Free memory was 157.8 MB in the beginning and 138.3 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 292514.23 ms. Allocated memory was 201.9 MB in the beginning and 167.8 MB in the end (delta: -34.1 MB). Free memory was 137.6 MB in the beginning and 136.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 441 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 695 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (128states) and FLOYD_HOARE automaton (currently 8 states, 10 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 292.4s, OverallIterations: 200, TraceHistogramMax: 8, AutomataDifference: 94.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1799 SDtfs, 19393 SDslu, 9587 SDs, 0 SdLazy, 5056 SolverSat, 2834 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4981 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 3887 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 10947 ImplicationChecksByTransitivity, 226.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 199 MinimizatonAttempts, 6712 StatesRemovedByMinimization, 198 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 144.1s InterpolantComputationTime, 5037 NumberOfCodeBlocks, 5037 NumberOfCodeBlocksAsserted, 661 NumberOfCheckSat, 4642 ConstructedInterpolants, 182 QuantifiedInterpolants, 705573 SizeOfPredicates, 2 NumberOfNonLiveVariables, 18142 ConjunctsInSsa, 2141 ConjunctsInUnsatCore, 395 InterpolantComputations, 5 PerfectInterpolantSequences, 0/3020 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