/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:41:09,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:41:09,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:41:09,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:41:09,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:41:09,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:41:09,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:41:09,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:41:09,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:41:09,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:41:09,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:41:09,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:41:09,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:41:09,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:41:09,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:41:09,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:41:09,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:41:09,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:41:09,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:41:09,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:41:09,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:41:09,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:41:09,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:41:09,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:41:09,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 11:41:09,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 11:41:09,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 11:41:09,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 11:41:09,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 11:41:09,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 11:41:09,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:41:09,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:41:09,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:41:09,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:41:09,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:41:09,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:41:09,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:41:09,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:41:09,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:41:09,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:41:09,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:41:09,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:41:09,568 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:41:09,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:41:09,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:41:09,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:41:09,570 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:41:09,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:41:09,573 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:41:09,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:41:09,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:41:09,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:41:09,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:41:09,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:41:09,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:41:09,574 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:41:09,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:41:09,575 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:41:09,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:41:09,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:41:09,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:41:09,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:41:09,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:41:09,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:09,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:41:09,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:41:09,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:41:09,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:41:09,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:41:09,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:41:09,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:41:09,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:41:09,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:41:09,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:41:09,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:41:09,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:41:09,930 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:41:09,931 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-18 11:41:10,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54f96005/670e621c6148486b9d65f068ecd44453/FLAG7ef80b301 [2019-12-18 11:41:10,565 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:41:10,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-18 11:41:10,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54f96005/670e621c6148486b9d65f068ecd44453/FLAG7ef80b301 [2019-12-18 11:41:10,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54f96005/670e621c6148486b9d65f068ecd44453 [2019-12-18 11:41:10,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:41:10,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:41:10,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:10,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:41:10,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:41:10,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9116c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:10, skipping insertion in model container [2019-12-18 11:41:10,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:41:10" (1/1) ... [2019-12-18 11:41:10,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:41:10,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:41:11,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,390 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:41:11,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:41:11,521 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:41:11,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11 WrapperNode [2019-12-18 11:41:11,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:41:11,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:41:11,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:41:11,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:41:11,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:41:11,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:41:11,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... [2019-12-18 11:41:11,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:41:11,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:41:11,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:41:11,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:41:11,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:41:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:41:11,695 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:41:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:41:11,696 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:41:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:41:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:41:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:41:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:41:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:41:11,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:41:11,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:41:11,699 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:41:12,042 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:41:12,043 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:41:12,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:12 BoogieIcfgContainer [2019-12-18 11:41:12,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:41:12,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:41:12,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:41:12,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:41:12,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:41:10" (1/3) ... [2019-12-18 11:41:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b04403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:41:11" (2/3) ... [2019-12-18 11:41:12,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b04403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:41:12, skipping insertion in model container [2019-12-18 11:41:12,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:41:12" (3/3) ... [2019-12-18 11:41:12,053 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2019-12-18 11:41:12,064 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:41:12,064 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:41:12,070 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:41:12,071 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:41:12,095 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,095 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,096 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,096 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,096 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,097 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,097 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,097 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,097 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,097 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,098 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,098 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,098 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,098 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,099 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,099 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,099 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,100 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,100 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,100 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,100 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,101 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,101 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,101 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,101 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,102 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,102 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,102 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,102 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,103 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,107 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,107 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,107 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,108 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,108 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,108 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,115 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,116 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,116 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,116 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:41:12,132 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:41:12,150 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:41:12,150 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:41:12,150 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:41:12,150 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:41:12,150 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:41:12,151 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:41:12,151 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:41:12,151 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:41:12,162 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 11:41:12,164 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,204 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,204 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,216 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. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,219 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 11:41:12,236 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 11:41:12,236 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:41:12,237 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. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 11:41:12,240 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 11:41:12,241 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:41:13,466 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 11:41:13,605 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-18 11:41:13,605 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 11:41:13,609 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:41:13,617 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:41:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:41:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:41:13,623 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:13,624 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:41:13,624 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-18 11:41:13,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:13,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753199227] [2019-12-18 11:41:13,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:13,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753199227] [2019-12-18 11:41:13,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:13,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:41:13,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027538959] [2019-12-18 11:41:13,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:41:13,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:41:13,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:13,878 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:41:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:13,925 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 11:41:13,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:41:13,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:41:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:13,953 INFO L225 Difference]: With dead ends: 54 [2019-12-18 11:41:13,953 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:41:13,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:41:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:41:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:41:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:41:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 11:41:14,005 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 11:41:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,005 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 11:41:14,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:41:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 11:41:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,011 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,018 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-18 11:41:14,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000957859] [2019-12-18 11:41:14,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000957859] [2019-12-18 11:41:14,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941216238] [2019-12-18 11:41:14,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,152 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 11:41:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,188 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-18 11:41:14,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,190 INFO L225 Difference]: With dead ends: 46 [2019-12-18 11:41:14,191 INFO L226 Difference]: Without dead ends: 45 [2019-12-18 11:41:14,191 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 [2019-12-18 11:41:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-18 11:41:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-18 11:41:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-18 11:41:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-18 11:41:14,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-18 11:41:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,200 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-18 11:41:14,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-18 11:41:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:41:14,201 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,201 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,201 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-18 11:41:14,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240587981] [2019-12-18 11:41:14,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240587981] [2019-12-18 11:41:14,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:14,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:41:14,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336495425] [2019-12-18 11:41:14,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:41:14,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:41:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:41:14,271 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-18 11:41:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,298 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 11:41:14,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:41:14,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:41:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,299 INFO L225 Difference]: With dead ends: 51 [2019-12-18 11:41:14,300 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 11:41:14,300 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 [2019-12-18 11:41:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 11:41:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 11:41:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 11:41:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 11:41:14,308 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 11:41:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,309 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 11:41:14,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:41:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 11:41:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,310 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,310 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,310 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-18 11:41:14,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730051289] [2019-12-18 11:41:14,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730051289] [2019-12-18 11:41:14,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734823902] [2019-12-18 11:41:14,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:14,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:14,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725743347] [2019-12-18 11:41:14,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:14,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:14,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:14,551 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 11:41:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:14,614 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-18 11:41:14,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:14,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:14,617 INFO L225 Difference]: With dead ends: 60 [2019-12-18 11:41:14,617 INFO L226 Difference]: Without dead ends: 59 [2019-12-18 11:41:14,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-18 11:41:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-18 11:41:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-18 11:41:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-18 11:41:14,632 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-18 11:41:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:14,632 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-18 11:41:14,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-18 11:41:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 11:41:14,636 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:14,636 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:14,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,842 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-18 11:41:14,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:14,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614834161] [2019-12-18 11:41:14,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:14,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614834161] [2019-12-18 11:41:14,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862232543] [2019-12-18 11:41:14,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:14,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:14,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:14,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:41:14,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 11:41:15,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47083273] [2019-12-18 11:41:15,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:41:15,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:41:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:41:15,042 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 8 states. [2019-12-18 11:41:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,106 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-18 11:41:15,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:15,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 11:41:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,109 INFO L225 Difference]: With dead ends: 61 [2019-12-18 11:41:15,109 INFO L226 Difference]: Without dead ends: 60 [2019-12-18 11:41:15,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-18 11:41:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-18 11:41:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 11:41:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 11:41:15,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 11:41:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,126 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 11:41:15,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:41:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 11:41:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,144 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,354 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-18 11:41:15,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407405799] [2019-12-18 11:41:15,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407405799] [2019-12-18 11:41:15,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431980944] [2019-12-18 11:41:15,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:15,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:15,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:15,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:15,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:15,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491798085] [2019-12-18 11:41:15,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:15,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:15,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:15,536 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 11:41:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:15,642 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-18 11:41:15,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:15,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:15,647 INFO L225 Difference]: With dead ends: 72 [2019-12-18 11:41:15,647 INFO L226 Difference]: Without dead ends: 71 [2019-12-18 11:41:15,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-18 11:41:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-18 11:41:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-18 11:41:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-18 11:41:15,663 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-18 11:41:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:15,663 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-18 11:41:15,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-18 11:41:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:15,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:15,665 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:15,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:15,877 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-18 11:41:15,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:15,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553657613] [2019-12-18 11:41:15,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:15,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553657613] [2019-12-18 11:41:15,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:15,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:15,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097977225] [2019-12-18 11:41:15,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:15,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:15,961 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-18 11:41:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,006 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-18 11:41:16,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:16,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,009 INFO L225 Difference]: With dead ends: 70 [2019-12-18 11:41:16,009 INFO L226 Difference]: Without dead ends: 69 [2019-12-18 11:41:16,010 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 [2019-12-18 11:41:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-18 11:41:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-18 11:41:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-18 11:41:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-18 11:41:16,021 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-18 11:41:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,025 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-18 11:41:16,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-18 11:41:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:16,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,026 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,027 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-18 11:41:16,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860878731] [2019-12-18 11:41:16,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860878731] [2019-12-18 11:41:16,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:41:16,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:41:16,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225594100] [2019-12-18 11:41:16,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:41:16,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:41:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:41:16,094 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-18 11:41:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,133 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-18 11:41:16,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:41:16,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:41:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,134 INFO L225 Difference]: With dead ends: 70 [2019-12-18 11:41:16,134 INFO L226 Difference]: Without dead ends: 69 [2019-12-18 11:41:16,135 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 [2019-12-18 11:41:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-18 11:41:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-18 11:41:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-18 11:41:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-18 11:41:16,141 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-18 11:41:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,142 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-18 11:41:16,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:41:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-18 11:41:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:41:16,143 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,143 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,143 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-18 11:41:16,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115527319] [2019-12-18 11:41:16,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115527319] [2019-12-18 11:41:16,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742796164] [2019-12-18 11:41:16,197 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:16,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:16,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207873960] [2019-12-18 11:41:16,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:16,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:16,307 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 10 states. [2019-12-18 11:41:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,403 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-18 11:41:16,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:41:16,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 11:41:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,404 INFO L225 Difference]: With dead ends: 75 [2019-12-18 11:41:16,404 INFO L226 Difference]: Without dead ends: 74 [2019-12-18 11:41:16,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:41:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-18 11:41:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-18 11:41:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 11:41:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 11:41:16,410 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 11:41:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,411 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 11:41:16,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 11:41:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,412 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:16,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,621 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-18 11:41:16,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:16,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547883220] [2019-12-18 11:41:16,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547883220] [2019-12-18 11:41:16,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463569347] [2019-12-18 11:41:16,708 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:16,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:16,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:16,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:16,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:16,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:16,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:16,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448732352] [2019-12-18 11:41:16,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:16,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:16,827 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 11:41:16,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:16,956 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-18 11:41:16,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:16,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:16,958 INFO L225 Difference]: With dead ends: 86 [2019-12-18 11:41:16,958 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 11:41:16,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 11:41:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 11:41:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-18 11:41:16,964 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-18 11:41:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:16,965 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-18 11:41:16,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-18 11:41:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:16,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:16,966 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,170 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-18 11:41:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383570512] [2019-12-18 11:41:17,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383570512] [2019-12-18 11:41:17,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910755387] [2019-12-18 11:41:17,247 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:17,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946287137] [2019-12-18 11:41:17,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,353 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-18 11:41:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,454 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-18 11:41:17,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:17,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,457 INFO L225 Difference]: With dead ends: 87 [2019-12-18 11:41:17,457 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 11:41:17,457 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 [2019-12-18 11:41:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 11:41:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-12-18 11:41:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 11:41:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-18 11:41:17,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-18 11:41:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,462 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-18 11:41:17,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-18 11:41:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,464 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:17,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,674 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-18 11:41:17,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:17,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747020760] [2019-12-18 11:41:17,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747020760] [2019-12-18 11:41:17,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043530265] [2019-12-18 11:41:17,748 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:17,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:17,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:17,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:17,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:17,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:17,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:17,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845089025] [2019-12-18 11:41:17,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:17,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:17,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:17,888 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-18 11:41:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:17,986 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-18 11:41:17,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:17,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:17,987 INFO L225 Difference]: With dead ends: 90 [2019-12-18 11:41:17,987 INFO L226 Difference]: Without dead ends: 89 [2019-12-18 11:41:17,987 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 [2019-12-18 11:41:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-18 11:41:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-12-18 11:41:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-18 11:41:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-18 11:41:17,992 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-18 11:41:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:17,992 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-18 11:41:17,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-18 11:41:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:17,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:17,993 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,200 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-18 11:41:18,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210582251] [2019-12-18 11:41:18,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210582251] [2019-12-18 11:41:18,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644163071] [2019-12-18 11:41:18,294 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,353 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:18,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217742187] [2019-12-18 11:41:18,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,409 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 10 states. [2019-12-18 11:41:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:18,514 INFO L93 Difference]: Finished difference Result 98 states and 202 transitions. [2019-12-18 11:41:18,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:18,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:18,516 INFO L225 Difference]: With dead ends: 98 [2019-12-18 11:41:18,516 INFO L226 Difference]: Without dead ends: 96 [2019-12-18 11:41:18,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-18 11:41:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2019-12-18 11:41:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-18 11:41:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-18 11:41:18,521 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-18 11:41:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:18,522 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-18 11:41:18,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:18,522 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-18 11:41:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:18,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:18,523 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:18,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,733 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 6 times [2019-12-18 11:41:18,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:18,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402319183] [2019-12-18 11:41:18,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402319183] [2019-12-18 11:41:18,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039036412] [2019-12-18 11:41:18,794 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:18,842 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:18,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:18,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:41:18,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:18,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:18,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 11:41:18,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444920174] [2019-12-18 11:41:18,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:41:18,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:18,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:41:18,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:41:18,912 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 10 states. [2019-12-18 11:41:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,019 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-18 11:41:19,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:19,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 11:41:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,021 INFO L225 Difference]: With dead ends: 90 [2019-12-18 11:41:19,021 INFO L226 Difference]: Without dead ends: 89 [2019-12-18 11:41:19,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-18 11:41:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2019-12-18 11:41:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-18 11:41:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-18 11:41:19,026 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-18 11:41:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,026 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-18 11:41:19,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:41:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-18 11:41:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:41:19,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,027 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,231 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-18 11:41:19,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609476956] [2019-12-18 11:41:19,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609476956] [2019-12-18 11:41:19,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885324502] [2019-12-18 11:41:19,299 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:19,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:19,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:19,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:19,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623455042] [2019-12-18 11:41:19,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:19,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:19,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:19,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:19,420 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 12 states. [2019-12-18 11:41:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:19,521 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-18 11:41:19,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:41:19,522 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 11:41:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:19,523 INFO L225 Difference]: With dead ends: 90 [2019-12-18 11:41:19,523 INFO L226 Difference]: Without dead ends: 89 [2019-12-18 11:41:19,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-18 11:41:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-18 11:41:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 11:41:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 11:41:19,530 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 11:41:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:19,530 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 11:41:19,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 11:41:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:19,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:19,531 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:19,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,739 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-18 11:41:19,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:19,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021893401] [2019-12-18 11:41:19,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:19,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021893401] [2019-12-18 11:41:19,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99428518] [2019-12-18 11:41:19,862 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:19,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:19,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:19,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:19,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:20,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395936854] [2019-12-18 11:41:20,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:20,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:20,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:20,013 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 11:41:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,142 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-18 11:41:20,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:20,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,144 INFO L225 Difference]: With dead ends: 101 [2019-12-18 11:41:20,144 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 11:41:20,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 11:41:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-18 11:41:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-18 11:41:20,148 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-18 11:41:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,149 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-18 11:41:20,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-18 11:41:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,150 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,150 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,353 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 7 times [2019-12-18 11:41:20,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336464638] [2019-12-18 11:41:20,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336464638] [2019-12-18 11:41:20,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533910374] [2019-12-18 11:41:20,443 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:20,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:20,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:20,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329567323] [2019-12-18 11:41:20,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:20,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:20,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:20,554 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-18 11:41:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:20,706 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2019-12-18 11:41:20,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:20,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:20,708 INFO L225 Difference]: With dead ends: 108 [2019-12-18 11:41:20,708 INFO L226 Difference]: Without dead ends: 107 [2019-12-18 11:41:20,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-18 11:41:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-18 11:41:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 11:41:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-18 11:41:20,713 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-18 11:41:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:20,714 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-18 11:41:20,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-18 11:41:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:20,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:20,715 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:20,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:20,918 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 8 times [2019-12-18 11:41:20,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:20,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379179800] [2019-12-18 11:41:20,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:20,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379179800] [2019-12-18 11:41:20,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350218553] [2019-12-18 11:41:20,981 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:21,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433451173] [2019-12-18 11:41:21,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,101 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-18 11:41:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,268 INFO L93 Difference]: Finished difference Result 112 states and 236 transitions. [2019-12-18 11:41:21,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:21,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,269 INFO L225 Difference]: With dead ends: 112 [2019-12-18 11:41:21,269 INFO L226 Difference]: Without dead ends: 110 [2019-12-18 11:41:21,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-18 11:41:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2019-12-18 11:41:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-18 11:41:21,274 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-18 11:41:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,274 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-18 11:41:21,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-18 11:41:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,275 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:21,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,479 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:21,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 9 times [2019-12-18 11:41:21,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:21,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744803063] [2019-12-18 11:41:21,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744803063] [2019-12-18 11:41:21,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064406382] [2019-12-18 11:41:21,548 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:21,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:21,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:21,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:21,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:21,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:21,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:21,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421270920] [2019-12-18 11:41:21,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:21,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:21,733 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-18 11:41:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:21,931 INFO L93 Difference]: Finished difference Result 113 states and 236 transitions. [2019-12-18 11:41:21,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:41:21,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:21,933 INFO L225 Difference]: With dead ends: 113 [2019-12-18 11:41:21,933 INFO L226 Difference]: Without dead ends: 112 [2019-12-18 11:41:21,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:41:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-12-18 11:41:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2019-12-18 11:41:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-18 11:41:21,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-18 11:41:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:21,938 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-18 11:41:21,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-18 11:41:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:21,938 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:21,939 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,145 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 10 times [2019-12-18 11:41:22,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900876693] [2019-12-18 11:41:22,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900876693] [2019-12-18 11:41:22,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356526869] [2019-12-18 11:41:22,224 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,266 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:22,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053895764] [2019-12-18 11:41:22,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,335 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-18 11:41:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:22,519 INFO L93 Difference]: Finished difference Result 119 states and 249 transitions. [2019-12-18 11:41:22,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:22,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:22,521 INFO L225 Difference]: With dead ends: 119 [2019-12-18 11:41:22,522 INFO L226 Difference]: Without dead ends: 117 [2019-12-18 11:41:22,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-12-18 11:41:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2019-12-18 11:41:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 11:41:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-18 11:41:22,526 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-18 11:41:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:22,527 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-18 11:41:22,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-18 11:41:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:22,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:22,528 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:22,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,731 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 11 times [2019-12-18 11:41:22,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:22,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396917436] [2019-12-18 11:41:22,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396917436] [2019-12-18 11:41:22,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672496728] [2019-12-18 11:41:22,790 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:22,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:22,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:22,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:22,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:22,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:22,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407739580] [2019-12-18 11:41:22,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:22,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:22,986 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 12 states. [2019-12-18 11:41:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,231 INFO L93 Difference]: Finished difference Result 123 states and 256 transitions. [2019-12-18 11:41:23,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:23,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,233 INFO L225 Difference]: With dead ends: 123 [2019-12-18 11:41:23,234 INFO L226 Difference]: Without dead ends: 121 [2019-12-18 11:41:23,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-18 11:41:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2019-12-18 11:41:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-18 11:41:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-18 11:41:23,239 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-18 11:41:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,239 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-18 11:41:23,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-18 11:41:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,240 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,240 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:23,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,450 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 12 times [2019-12-18 11:41:23,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:23,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766011870] [2019-12-18 11:41:23,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766011870] [2019-12-18 11:41:23,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465990467] [2019-12-18 11:41:23,542 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:23,613 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:41:23,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:23,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:23,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:23,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:23,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:23,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261272909] [2019-12-18 11:41:23,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:23,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:23,715 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 12 states. [2019-12-18 11:41:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:23,900 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2019-12-18 11:41:23,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:23,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:23,902 INFO L225 Difference]: With dead ends: 121 [2019-12-18 11:41:23,902 INFO L226 Difference]: Without dead ends: 119 [2019-12-18 11:41:23,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:41:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-18 11:41:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2019-12-18 11:41:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-18 11:41:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 200 transitions. [2019-12-18 11:41:23,906 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 200 transitions. Word has length 11 [2019-12-18 11:41:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:23,906 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 200 transitions. [2019-12-18 11:41:23,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 200 transitions. [2019-12-18 11:41:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:23,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:23,909 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,114 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 13 times [2019-12-18 11:41:24,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446824144] [2019-12-18 11:41:24,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446824144] [2019-12-18 11:41:24,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213328896] [2019-12-18 11:41:24,186 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 11:41:24,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384713833] [2019-12-18 11:41:24,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:41:24,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:41:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:41:24,299 INFO L87 Difference]: Start difference. First operand 90 states and 200 transitions. Second operand 12 states. [2019-12-18 11:41:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:24,484 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-18 11:41:24,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:24,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 11:41:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:24,485 INFO L225 Difference]: With dead ends: 110 [2019-12-18 11:41:24,485 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 11:41:24,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 11:41:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-18 11:41:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 11:41:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-18 11:41:24,488 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-18 11:41:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:24,488 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-18 11:41:24,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:41:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-18 11:41:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:41:24,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:24,489 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:24,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,689 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:24,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-18 11:41:24,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:24,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779429884] [2019-12-18 11:41:24,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779429884] [2019-12-18 11:41:24,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749512589] [2019-12-18 11:41:24,753 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:24,811 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:24,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:24,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:24,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:24,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:24,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:24,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803370885] [2019-12-18 11:41:24,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:24,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:24,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:24,923 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 14 states. [2019-12-18 11:41:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,060 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-18 11:41:25,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:41:25,062 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 11:41:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,063 INFO L225 Difference]: With dead ends: 105 [2019-12-18 11:41:25,063 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 11:41:25,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-18 11:41:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 11:41:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-18 11:41:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 11:41:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 11:41:25,066 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 11:41:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,067 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 11:41:25,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 11:41:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:25,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,067 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,271 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-18 11:41:25,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022552798] [2019-12-18 11:41:25,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022552798] [2019-12-18 11:41:25,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778009584] [2019-12-18 11:41:25,373 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:25,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:25,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:25,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:25,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:25,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:25,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857980705] [2019-12-18 11:41:25,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:25,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:25,531 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-18 11:41:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:25,713 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-18 11:41:25,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:25,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:25,715 INFO L225 Difference]: With dead ends: 116 [2019-12-18 11:41:25,715 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 11:41:25,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 11:41:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-18 11:41:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-18 11:41:25,719 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-18 11:41:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:25,719 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-18 11:41:25,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-18 11:41:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:25,720 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:25,720 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:25,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:25,921 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 14 times [2019-12-18 11:41:25,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:25,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669087289] [2019-12-18 11:41:25,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669087289] [2019-12-18 11:41:26,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199230361] [2019-12-18 11:41:26,011 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:26,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:26,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:26,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125616486] [2019-12-18 11:41:26,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:26,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:26,165 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-18 11:41:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:26,411 INFO L93 Difference]: Finished difference Result 125 states and 265 transitions. [2019-12-18 11:41:26,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:26,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:26,413 INFO L225 Difference]: With dead ends: 125 [2019-12-18 11:41:26,413 INFO L226 Difference]: Without dead ends: 124 [2019-12-18 11:41:26,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-18 11:41:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-18 11:41:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-18 11:41:26,417 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-18 11:41:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:26,418 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-18 11:41:26,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-18 11:41:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:26,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:26,419 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:26,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,622 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 15 times [2019-12-18 11:41:26,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:26,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838971430] [2019-12-18 11:41:26,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838971430] [2019-12-18 11:41:26,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586837912] [2019-12-18 11:41:26,728 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:26,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:41:26,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:26,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:26,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:26,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:26,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:26,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79789473] [2019-12-18 11:41:26,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:26,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:26,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:26,906 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-18 11:41:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:27,205 INFO L93 Difference]: Finished difference Result 134 states and 283 transitions. [2019-12-18 11:41:27,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:27,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:27,208 INFO L225 Difference]: With dead ends: 134 [2019-12-18 11:41:27,208 INFO L226 Difference]: Without dead ends: 133 [2019-12-18 11:41:27,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-12-18 11:41:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2019-12-18 11:41:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-18 11:41:27,212 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-18 11:41:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:27,212 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-18 11:41:27,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-18 11:41:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:27,213 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:27,213 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:27,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,416 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 16 times [2019-12-18 11:41:27,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:27,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858758350] [2019-12-18 11:41:27,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:27,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858758350] [2019-12-18 11:41:27,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127121771] [2019-12-18 11:41:27,509 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:27,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:27,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:27,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:27,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:28,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:28,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:28,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774401085] [2019-12-18 11:41:28,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:28,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2019-12-18 11:41:28,098 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-18 11:41:28,708 WARN L192 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-18 11:41:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:29,788 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-18 11:41:29,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:29,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:29,789 INFO L225 Difference]: With dead ends: 140 [2019-12-18 11:41:29,789 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 11:41:29,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=142, Invalid=319, Unknown=1, NotChecked=0, Total=462 [2019-12-18 11:41:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 11:41:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2019-12-18 11:41:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-18 11:41:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-18 11:41:29,793 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-18 11:41:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:29,794 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-18 11:41:29,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-18 11:41:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:29,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:29,795 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:29,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:29,996 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:29,996 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 17 times [2019-12-18 11:41:29,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:29,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810677466] [2019-12-18 11:41:29,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810677466] [2019-12-18 11:41:30,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863149154] [2019-12-18 11:41:30,076 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,132 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:30,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:30,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:30,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145757838] [2019-12-18 11:41:30,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:30,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:30,246 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-18 11:41:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:30,527 INFO L93 Difference]: Finished difference Result 133 states and 280 transitions. [2019-12-18 11:41:30,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:30,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:30,528 INFO L225 Difference]: With dead ends: 133 [2019-12-18 11:41:30,528 INFO L226 Difference]: Without dead ends: 131 [2019-12-18 11:41:30,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-18 11:41:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-18 11:41:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-18 11:41:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-18 11:41:30,533 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-18 11:41:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:30,533 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-18 11:41:30,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-18 11:41:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:30,534 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:30,534 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:30,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,737 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 18 times [2019-12-18 11:41:30,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:30,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762729155] [2019-12-18 11:41:30,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:30,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762729155] [2019-12-18 11:41:30,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710041821] [2019-12-18 11:41:30,810 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:30,854 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:30,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:30,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:30,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260715858] [2019-12-18 11:41:31,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,025 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 14 states. [2019-12-18 11:41:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:31,379 INFO L93 Difference]: Finished difference Result 148 states and 313 transitions. [2019-12-18 11:41:31,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:31,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:31,381 INFO L225 Difference]: With dead ends: 148 [2019-12-18 11:41:31,381 INFO L226 Difference]: Without dead ends: 146 [2019-12-18 11:41:31,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-18 11:41:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-12-18 11:41:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-18 11:41:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-18 11:41:31,386 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-18 11:41:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:31,387 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-18 11:41:31,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-18 11:41:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:31,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:31,387 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:31,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,588 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 19 times [2019-12-18 11:41:31,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:31,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319114704] [2019-12-18 11:41:31,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319114704] [2019-12-18 11:41:31,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177357466] [2019-12-18 11:41:31,662 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:31,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:31,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:31,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:31,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:31,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468039239] [2019-12-18 11:41:31,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:31,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:31,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:31,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:31,852 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-18 11:41:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,155 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2019-12-18 11:41:32,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:32,155 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,156 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:41:32,157 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:41:32,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:41:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2019-12-18 11:41:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-18 11:41:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 237 transitions. [2019-12-18 11:41:32,162 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 237 transitions. Word has length 12 [2019-12-18 11:41:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,162 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 237 transitions. [2019-12-18 11:41:32,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 237 transitions. [2019-12-18 11:41:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,163 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:32,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,367 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:32,367 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 20 times [2019-12-18 11:41:32,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:32,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590598666] [2019-12-18 11:41:32,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590598666] [2019-12-18 11:41:32,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175868357] [2019-12-18 11:41:32,440 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:32,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:32,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:32,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:32,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:32,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:32,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:32,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265419387] [2019-12-18 11:41:32,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:32,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:32,616 INFO L87 Difference]: Start difference. First operand 104 states and 237 transitions. Second operand 14 states. [2019-12-18 11:41:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:32,901 INFO L93 Difference]: Finished difference Result 139 states and 294 transitions. [2019-12-18 11:41:32,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:32,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:32,902 INFO L225 Difference]: With dead ends: 139 [2019-12-18 11:41:32,902 INFO L226 Difference]: Without dead ends: 138 [2019-12-18 11:41:32,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-18 11:41:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-18 11:41:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2019-12-18 11:41:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-18 11:41:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-18 11:41:32,907 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-18 11:41:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:32,907 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-18 11:41:32,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-18 11:41:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:32,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:32,908 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:33,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,111 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 21 times [2019-12-18 11:41:33,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:33,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424784012] [2019-12-18 11:41:33,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:33,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424784012] [2019-12-18 11:41:33,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704516949] [2019-12-18 11:41:33,187 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:33,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:33,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:33,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:33,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:34,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:34,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:34,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238754221] [2019-12-18 11:41:34,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:34,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=131, Unknown=2, NotChecked=0, Total=182 [2019-12-18 11:41:34,795 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-18 11:41:35,212 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 11:41:36,427 WARN L192 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 11:41:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:36,461 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2019-12-18 11:41:36,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:36,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:36,463 INFO L225 Difference]: With dead ends: 152 [2019-12-18 11:41:36,464 INFO L226 Difference]: Without dead ends: 150 [2019-12-18 11:41:36,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=156, Invalid=348, Unknown=2, NotChecked=0, Total=506 [2019-12-18 11:41:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-18 11:41:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2019-12-18 11:41:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-18 11:41:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-18 11:41:36,469 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-18 11:41:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:36,469 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-18 11:41:36,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-18 11:41:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:36,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:36,470 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:36,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,673 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 22 times [2019-12-18 11:41:36,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:36,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144425761] [2019-12-18 11:41:36,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144425761] [2019-12-18 11:41:36,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892440950] [2019-12-18 11:41:36,755 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:36,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:36,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:36,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:36,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:36,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:36,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:36,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031761028] [2019-12-18 11:41:36,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:36,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:36,920 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-18 11:41:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:37,244 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-18 11:41:37,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:41:37,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:37,245 INFO L225 Difference]: With dead ends: 146 [2019-12-18 11:41:37,246 INFO L226 Difference]: Without dead ends: 144 [2019-12-18 11:41:37,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-18 11:41:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2019-12-18 11:41:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-18 11:41:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 228 transitions. [2019-12-18 11:41:37,250 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 228 transitions. Word has length 12 [2019-12-18 11:41:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:37,250 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 228 transitions. [2019-12-18 11:41:37,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 228 transitions. [2019-12-18 11:41:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:37,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:37,251 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:37,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,455 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 23 times [2019-12-18 11:41:37,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:37,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338000649] [2019-12-18 11:41:37,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338000649] [2019-12-18 11:41:37,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624539556] [2019-12-18 11:41:37,532 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:37,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:37,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:37,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:37,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:37,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:37,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:37,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136240839] [2019-12-18 11:41:37,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:37,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:37,687 INFO L87 Difference]: Start difference. First operand 101 states and 228 transitions. Second operand 14 states. [2019-12-18 11:41:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,029 INFO L93 Difference]: Finished difference Result 158 states and 329 transitions. [2019-12-18 11:41:38,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:41:38,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,031 INFO L225 Difference]: With dead ends: 158 [2019-12-18 11:41:38,031 INFO L226 Difference]: Without dead ends: 156 [2019-12-18 11:41:38,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-18 11:41:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2019-12-18 11:41:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-18 11:41:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-18 11:41:38,040 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-18 11:41:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,040 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-18 11:41:38,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-18 11:41:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,041 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,042 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,256 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 24 times [2019-12-18 11:41:38,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343607114] [2019-12-18 11:41:38,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343607114] [2019-12-18 11:41:38,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600013274] [2019-12-18 11:41:38,364 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,416 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:38,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:38,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:38,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:38,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:38,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:38,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113228659] [2019-12-18 11:41:38,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:38,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:38,510 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-18 11:41:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:38,740 INFO L93 Difference]: Finished difference Result 154 states and 328 transitions. [2019-12-18 11:41:38,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:38,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:38,742 INFO L225 Difference]: With dead ends: 154 [2019-12-18 11:41:38,742 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 11:41:38,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 11:41:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2019-12-18 11:41:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-18 11:41:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-18 11:41:38,746 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-18 11:41:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:38,747 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-18 11:41:38,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-18 11:41:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:38,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:38,748 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:38,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:38,951 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 25 times [2019-12-18 11:41:38,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:38,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368959411] [2019-12-18 11:41:38,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368959411] [2019-12-18 11:41:39,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197529283] [2019-12-18 11:41:39,062 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12582113] [2019-12-18 11:41:39,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,207 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-18 11:41:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:39,497 INFO L93 Difference]: Finished difference Result 150 states and 318 transitions. [2019-12-18 11:41:39,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:41:39,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:39,499 INFO L225 Difference]: With dead ends: 150 [2019-12-18 11:41:39,499 INFO L226 Difference]: Without dead ends: 148 [2019-12-18 11:41:39,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:41:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-18 11:41:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 104. [2019-12-18 11:41:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-18 11:41:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-18 11:41:39,503 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-18 11:41:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:39,503 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-18 11:41:39,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-18 11:41:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:39,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:39,504 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:39,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,705 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2046775021, now seen corresponding path program 26 times [2019-12-18 11:41:39,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:39,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557941817] [2019-12-18 11:41:39,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557941817] [2019-12-18 11:41:39,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767682192] [2019-12-18 11:41:39,773 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:39,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:39,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:39,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:39,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:39,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:39,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:39,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266749762] [2019-12-18 11:41:39,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:39,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:39,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:39,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:39,921 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-18 11:41:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,185 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2019-12-18 11:41:40,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:41:40,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,187 INFO L225 Difference]: With dead ends: 133 [2019-12-18 11:41:40,187 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 11:41:40,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 11:41:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2019-12-18 11:41:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-18 11:41:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-18 11:41:40,192 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-18 11:41:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,192 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-18 11:41:40,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-18 11:41:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,193 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,193 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:40,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:40,397 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 27 times [2019-12-18 11:41:40,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:40,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552833321] [2019-12-18 11:41:40,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552833321] [2019-12-18 11:41:40,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444933191] [2019-12-18 11:41:40,469 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:40,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:40,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:40,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:40,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:40,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:40,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:40,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245657583] [2019-12-18 11:41:40,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:40,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:40,606 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-18 11:41:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:40,850 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-18 11:41:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:41:40,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:40,852 INFO L225 Difference]: With dead ends: 140 [2019-12-18 11:41:40,852 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 11:41:40,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 11:41:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2019-12-18 11:41:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-18 11:41:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-18 11:41:40,857 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-18 11:41:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:40,857 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-18 11:41:40,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-18 11:41:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:40,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:40,858 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,061 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 28 times [2019-12-18 11:41:41,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800141203] [2019-12-18 11:41:41,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800141203] [2019-12-18 11:41:41,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391132217] [2019-12-18 11:41:41,118 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,159 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:41,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:41,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:41:41,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:41,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 11:41:41,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970548975] [2019-12-18 11:41:41,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:41:41,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:41,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:41:41,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:41:41,260 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 14 states. [2019-12-18 11:41:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:41,473 INFO L93 Difference]: Finished difference Result 125 states and 256 transitions. [2019-12-18 11:41:41,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:41:41,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 11:41:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:41,475 INFO L225 Difference]: With dead ends: 125 [2019-12-18 11:41:41,475 INFO L226 Difference]: Without dead ends: 124 [2019-12-18 11:41:41,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-18 11:41:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-18 11:41:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2019-12-18 11:41:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-18 11:41:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2019-12-18 11:41:41,478 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 12 [2019-12-18 11:41:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:41,479 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2019-12-18 11:41:41,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:41:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2019-12-18 11:41:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:41:41,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:41,479 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:41,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,683 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-18 11:41:41,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:41,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457210910] [2019-12-18 11:41:41,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457210910] [2019-12-18 11:41:41,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318452470] [2019-12-18 11:41:41,760 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:41,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:41:41,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:41,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:41,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:41,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:41,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:41,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982119764] [2019-12-18 11:41:41,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:41,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:41,906 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand 16 states. [2019-12-18 11:41:42,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,068 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2019-12-18 11:41:42,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:41:42,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 11:41:42,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,069 INFO L225 Difference]: With dead ends: 120 [2019-12-18 11:41:42,069 INFO L226 Difference]: Without dead ends: 119 [2019-12-18 11:41:42,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:41:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-18 11:41:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2019-12-18 11:41:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-18 11:41:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-18 11:41:42,074 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-18 11:41:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,074 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-18 11:41:42,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-18 11:41:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:42,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,075 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:42,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,278 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:42,278 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-18 11:41:42,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:42,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880656386] [2019-12-18 11:41:42,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880656386] [2019-12-18 11:41:42,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520084616] [2019-12-18 11:41:42,378 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:42,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:41:42,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:42,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:42,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:41:42,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481109050] [2019-12-18 11:41:42,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:41:42,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:41:42,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:41:42,547 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 18 states. [2019-12-18 11:41:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:42,747 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-18 11:41:42,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:41:42,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-18 11:41:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:42,753 INFO L225 Difference]: With dead ends: 131 [2019-12-18 11:41:42,753 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 11:41:42,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:41:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 11:41:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-18 11:41:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-18 11:41:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-18 11:41:42,758 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-18 11:41:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:42,758 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-18 11:41:42,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:41:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-18 11:41:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:42,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:42,763 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:42,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:42,966 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 29 times [2019-12-18 11:41:42,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:42,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660105479] [2019-12-18 11:41:42,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660105479] [2019-12-18 11:41:43,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858634118] [2019-12-18 11:41:43,046 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,088 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:43,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:43,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:43,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796813067] [2019-12-18 11:41:43,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:43,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:43,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:43,210 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-18 11:41:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:43,517 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-18 11:41:43,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:41:43,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:43,519 INFO L225 Difference]: With dead ends: 149 [2019-12-18 11:41:43,519 INFO L226 Difference]: Without dead ends: 148 [2019-12-18 11:41:43,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:41:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-18 11:41:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-18 11:41:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-18 11:41:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-18 11:41:43,523 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-18 11:41:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:43,523 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-18 11:41:43,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-18 11:41:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:43,524 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:43,524 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:43,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,726 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 30 times [2019-12-18 11:41:43,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:43,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075857238] [2019-12-18 11:41:43,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075857238] [2019-12-18 11:41:43,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485535568] [2019-12-18 11:41:43,826 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:43,871 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:41:43,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:43,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:43,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:43,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:43,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:43,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925088094] [2019-12-18 11:41:43,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:43,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:43,999 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-18 11:41:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:44,325 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-18 11:41:44,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:44,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:44,327 INFO L225 Difference]: With dead ends: 157 [2019-12-18 11:41:44,327 INFO L226 Difference]: Without dead ends: 156 [2019-12-18 11:41:44,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:41:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-18 11:41:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2019-12-18 11:41:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-18 11:41:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-18 11:41:44,331 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-18 11:41:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:44,331 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-18 11:41:44,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-18 11:41:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:44,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:44,332 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:44,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,533 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 31 times [2019-12-18 11:41:44,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:44,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33224545] [2019-12-18 11:41:44,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:44,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33224545] [2019-12-18 11:41:44,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041613605] [2019-12-18 11:41:44,631 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:44,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:44,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:45,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:45,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:45,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072735973] [2019-12-18 11:41:45,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:45,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:45,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=179, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:41:45,893 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-18 11:41:46,783 WARN L192 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:41:46,907 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-18 11:41:48,562 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-18 11:41:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:48,627 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2019-12-18 11:41:48,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:41:48,628 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:48,630 INFO L225 Difference]: With dead ends: 162 [2019-12-18 11:41:48,630 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 11:41:48,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=216, Invalid=482, Unknown=4, NotChecked=0, Total=702 [2019-12-18 11:41:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 11:41:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 111. [2019-12-18 11:41:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-18 11:41:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-18 11:41:48,634 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-18 11:41:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:48,634 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-18 11:41:48,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-18 11:41:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:48,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:48,635 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:48,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:48,836 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 32 times [2019-12-18 11:41:48,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:48,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861017410] [2019-12-18 11:41:48,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:48,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861017410] [2019-12-18 11:41:48,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933963216] [2019-12-18 11:41:48,920 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:48,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:41:48,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:48,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:48,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:49,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:49,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973056681] [2019-12-18 11:41:49,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:49,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:49,160 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-18 11:41:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:49,617 INFO L93 Difference]: Finished difference Result 165 states and 347 transitions. [2019-12-18 11:41:49,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:41:49,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:49,619 INFO L225 Difference]: With dead ends: 165 [2019-12-18 11:41:49,619 INFO L226 Difference]: Without dead ends: 163 [2019-12-18 11:41:49,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:41:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-18 11:41:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2019-12-18 11:41:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-18 11:41:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-18 11:41:49,623 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-18 11:41:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:49,623 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-18 11:41:49,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-18 11:41:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:49,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:49,624 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:49,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,828 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 33 times [2019-12-18 11:41:49,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:49,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054734949] [2019-12-18 11:41:49,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:49,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054734949] [2019-12-18 11:41:49,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946225343] [2019-12-18 11:41:49,903 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:49,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:41:49,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:49,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:49,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:50,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:50,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:50,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252825159] [2019-12-18 11:41:50,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:50,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:50,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:50,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:41:50,148 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-18 11:41:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:52,641 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2019-12-18 11:41:52,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:41:52,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:52,643 INFO L225 Difference]: With dead ends: 168 [2019-12-18 11:41:52,643 INFO L226 Difference]: Without dead ends: 167 [2019-12-18 11:41:52,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=547, Unknown=1, NotChecked=0, Total=812 [2019-12-18 11:41:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-18 11:41:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 112. [2019-12-18 11:41:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-18 11:41:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-18 11:41:52,647 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-18 11:41:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:52,647 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-18 11:41:52,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-18 11:41:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:52,648 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:52,648 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:52,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,849 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 34 times [2019-12-18 11:41:52,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:52,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701990411] [2019-12-18 11:41:52,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:52,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701990411] [2019-12-18 11:41:52,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384804382] [2019-12-18 11:41:52,940 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:52,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:41:52,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:52,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:52,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:54,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:54,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:54,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114869975] [2019-12-18 11:41:54,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:54,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:54,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=179, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:41:54,295 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 16 states. [2019-12-18 11:41:54,761 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-12-18 11:41:55,195 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-18 11:41:56,858 WARN L192 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:41:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:41:57,010 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2019-12-18 11:41:57,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:41:57,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:41:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:41:57,012 INFO L225 Difference]: With dead ends: 172 [2019-12-18 11:41:57,012 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 11:41:57,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=204, Invalid=496, Unknown=2, NotChecked=0, Total=702 [2019-12-18 11:41:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 11:41:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2019-12-18 11:41:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-18 11:41:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-18 11:41:57,017 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-18 11:41:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:41:57,017 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-18 11:41:57,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:41:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-18 11:41:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:41:57,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:41:57,018 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:41:57,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:57,221 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:41:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:41:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 35 times [2019-12-18 11:41:57,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:41:57,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603419407] [2019-12-18 11:41:57,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:41:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:41:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:57,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603419407] [2019-12-18 11:41:57,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168478420] [2019-12-18 11:41:57,301 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:41:57,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:41:57,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:41:57,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:41:57,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:41:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:41:59,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:41:59,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:41:59,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308434561] [2019-12-18 11:41:59,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:41:59,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:41:59,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:41:59,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:41:59,564 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 16 states. [2019-12-18 11:42:00,498 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:00,667 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:01,903 INFO L93 Difference]: Finished difference Result 173 states and 360 transitions. [2019-12-18 11:42:01,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:01,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:01,904 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:42:01,904 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 11:42:01,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=225, Invalid=529, Unknown=2, NotChecked=0, Total=756 [2019-12-18 11:42:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 11:42:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 111. [2019-12-18 11:42:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-18 11:42:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-18 11:42:01,909 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-18 11:42:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:01,909 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-18 11:42:01,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-18 11:42:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:01,910 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:01,910 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:02,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,114 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 36 times [2019-12-18 11:42:02,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:02,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547109733] [2019-12-18 11:42:02,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547109733] [2019-12-18 11:42:02,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701254586] [2019-12-18 11:42:02,203 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:02,246 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:02,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:02,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:02,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:02,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:02,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:02,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740999429] [2019-12-18 11:42:02,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:02,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:02,399 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-18 11:42:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:02,882 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2019-12-18 11:42:02,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:02,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:02,884 INFO L225 Difference]: With dead ends: 182 [2019-12-18 11:42:02,884 INFO L226 Difference]: Without dead ends: 180 [2019-12-18 11:42:02,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-18 11:42:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 116. [2019-12-18 11:42:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-18 11:42:02,889 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-18 11:42:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:02,889 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-18 11:42:02,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-18 11:42:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:02,890 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:02,890 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:03,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:03,093 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 37 times [2019-12-18 11:42:03,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:03,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619537322] [2019-12-18 11:42:03,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:03,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619537322] [2019-12-18 11:42:03,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920619415] [2019-12-18 11:42:03,177 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:03,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:03,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:03,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:03,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:03,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745305601] [2019-12-18 11:42:03,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:03,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:03,396 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-18 11:42:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:03,826 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-18 11:42:03,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:03,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:03,829 INFO L225 Difference]: With dead ends: 186 [2019-12-18 11:42:03,829 INFO L226 Difference]: Without dead ends: 184 [2019-12-18 11:42:03,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-18 11:42:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 116. [2019-12-18 11:42:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-18 11:42:03,834 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-18 11:42:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:03,834 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-18 11:42:03,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-18 11:42:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:03,835 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:03,835 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:04,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:04,038 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 38 times [2019-12-18 11:42:04,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:04,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608091684] [2019-12-18 11:42:04,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:04,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608091684] [2019-12-18 11:42:04,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618356066] [2019-12-18 11:42:04,235 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:04,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:04,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:04,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:04,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:04,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:04,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:04,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178483198] [2019-12-18 11:42:04,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:04,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:04,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:04,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:04,545 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-18 11:42:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:05,094 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2019-12-18 11:42:05,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:42:05,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:05,096 INFO L225 Difference]: With dead ends: 177 [2019-12-18 11:42:05,097 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 11:42:05,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 11:42:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2019-12-18 11:42:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 11:42:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 268 transitions. [2019-12-18 11:42:05,102 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 268 transitions. Word has length 13 [2019-12-18 11:42:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:05,102 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 268 transitions. [2019-12-18 11:42:05,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 268 transitions. [2019-12-18 11:42:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:05,103 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:05,103 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:05,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,306 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 39 times [2019-12-18 11:42:05,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:05,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681797180] [2019-12-18 11:42:05,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:05,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681797180] [2019-12-18 11:42:05,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603912223] [2019-12-18 11:42:05,385 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:05,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:42:05,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:05,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:05,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:06,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:06,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:06,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278884289] [2019-12-18 11:42:06,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:06,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:06,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:06,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-18 11:42:06,069 INFO L87 Difference]: Start difference. First operand 115 states and 268 transitions. Second operand 16 states. [2019-12-18 11:42:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:06,572 INFO L93 Difference]: Finished difference Result 167 states and 357 transitions. [2019-12-18 11:42:06,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:06,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:06,574 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:42:06,574 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:42:06,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=494, Unknown=1, NotChecked=0, Total=702 [2019-12-18 11:42:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:42:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 116. [2019-12-18 11:42:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-18 11:42:06,578 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-18 11:42:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:06,579 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-18 11:42:06,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-18 11:42:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:06,579 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:06,580 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:06,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,786 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 40 times [2019-12-18 11:42:06,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:06,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444748373] [2019-12-18 11:42:06,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:06,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444748373] [2019-12-18 11:42:06,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120482758] [2019-12-18 11:42:06,875 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:06,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:06,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:06,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:06,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:07,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:07,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:07,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623801905] [2019-12-18 11:42:07,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:07,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:07,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:07,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:07,105 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-18 11:42:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:07,530 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2019-12-18 11:42:07,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:07,530 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:07,532 INFO L225 Difference]: With dead ends: 174 [2019-12-18 11:42:07,532 INFO L226 Difference]: Without dead ends: 173 [2019-12-18 11:42:07,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-18 11:42:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2019-12-18 11:42:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-18 11:42:07,537 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-18 11:42:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:07,537 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-18 11:42:07,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:07,537 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-18 11:42:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:07,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:07,538 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:07,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,741 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 41 times [2019-12-18 11:42:07,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:07,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271650125] [2019-12-18 11:42:07,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:07,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271650125] [2019-12-18 11:42:07,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666748822] [2019-12-18 11:42:07,829 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:07,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:07,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:07,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:07,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:14,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:14,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:14,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077568905] [2019-12-18 11:42:14,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:14,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:14,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:14,322 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-18 11:42:16,617 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 11:42:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:16,875 INFO L93 Difference]: Finished difference Result 167 states and 360 transitions. [2019-12-18 11:42:16,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:16,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:16,876 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:42:16,876 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:42:16,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:42:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2019-12-18 11:42:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-18 11:42:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 264 transitions. [2019-12-18 11:42:16,880 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 264 transitions. Word has length 13 [2019-12-18 11:42:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:16,880 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 264 transitions. [2019-12-18 11:42:16,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 264 transitions. [2019-12-18 11:42:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:16,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:16,881 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,084 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 35069218, now seen corresponding path program 42 times [2019-12-18 11:42:17,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339938186] [2019-12-18 11:42:17,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339938186] [2019-12-18 11:42:17,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650596105] [2019-12-18 11:42:17,158 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:17,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:17,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:17,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:17,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296127807] [2019-12-18 11:42:17,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:17,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:17,326 INFO L87 Difference]: Start difference. First operand 114 states and 264 transitions. Second operand 16 states. [2019-12-18 11:42:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:17,630 INFO L93 Difference]: Finished difference Result 144 states and 304 transitions. [2019-12-18 11:42:17,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:17,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:17,632 INFO L225 Difference]: With dead ends: 144 [2019-12-18 11:42:17,632 INFO L226 Difference]: Without dead ends: 143 [2019-12-18 11:42:17,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-18 11:42:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2019-12-18 11:42:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-18 11:42:17,636 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-18 11:42:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:17,636 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-18 11:42:17,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-18 11:42:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:17,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:17,637 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:17,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,840 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 35158591, now seen corresponding path program 43 times [2019-12-18 11:42:17,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:17,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345885398] [2019-12-18 11:42:17,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:17,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345885398] [2019-12-18 11:42:17,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420439552] [2019-12-18 11:42:17,928 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:17,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:17,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:19,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:19,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:19,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185130082] [2019-12-18 11:42:19,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:19,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:19,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-18 11:42:19,227 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-18 11:42:20,585 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-18 11:42:21,822 WARN L192 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:21,999 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:42:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:22,034 INFO L93 Difference]: Finished difference Result 190 states and 396 transitions. [2019-12-18 11:42:22,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:42:22,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:22,037 INFO L225 Difference]: With dead ends: 190 [2019-12-18 11:42:22,037 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:42:22,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=276, Invalid=649, Unknown=5, NotChecked=0, Total=930 [2019-12-18 11:42:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:42:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 117. [2019-12-18 11:42:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 11:42:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-18 11:42:22,041 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-18 11:42:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:22,041 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-18 11:42:22,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-18 11:42:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:22,042 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:22,042 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:22,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,245 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 35158684, now seen corresponding path program 44 times [2019-12-18 11:42:22,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:22,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425606120] [2019-12-18 11:42:22,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:22,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425606120] [2019-12-18 11:42:22,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160235826] [2019-12-18 11:42:22,324 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:22,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:22,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:22,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:22,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:23,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:23,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:23,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481937894] [2019-12-18 11:42:23,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:23,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:23,372 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 16 states. [2019-12-18 11:42:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:24,672 INFO L93 Difference]: Finished difference Result 186 states and 395 transitions. [2019-12-18 11:42:24,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:24,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:24,674 INFO L225 Difference]: With dead ends: 186 [2019-12-18 11:42:24,674 INFO L226 Difference]: Without dead ends: 184 [2019-12-18 11:42:24,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=211, Invalid=489, Unknown=2, NotChecked=0, Total=702 [2019-12-18 11:42:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-18 11:42:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2019-12-18 11:42:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:42:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-18 11:42:24,679 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-18 11:42:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:24,679 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-18 11:42:24,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-18 11:42:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:24,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:24,680 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:24,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:24,880 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash 35161474, now seen corresponding path program 45 times [2019-12-18 11:42:24,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:24,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052330125] [2019-12-18 11:42:24,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:24,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052330125] [2019-12-18 11:42:24,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38830821] [2019-12-18 11:42:24,967 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:25,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:25,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:25,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:25,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:25,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:25,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:25,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669376653] [2019-12-18 11:42:25,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:25,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:25,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:25,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:25,176 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-18 11:42:25,580 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 11:42:26,167 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 11:42:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:26,208 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-18 11:42:26,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:26,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:26,210 INFO L225 Difference]: With dead ends: 186 [2019-12-18 11:42:26,210 INFO L226 Difference]: Without dead ends: 184 [2019-12-18 11:42:26,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-18 11:42:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 118. [2019-12-18 11:42:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 11:42:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 271 transitions. [2019-12-18 11:42:26,214 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 271 transitions. Word has length 13 [2019-12-18 11:42:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:26,215 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 271 transitions. [2019-12-18 11:42:26,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 271 transitions. [2019-12-18 11:42:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:26,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:26,215 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:26,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:26,419 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash 37839781, now seen corresponding path program 46 times [2019-12-18 11:42:26,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:26,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406203736] [2019-12-18 11:42:26,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:26,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406203736] [2019-12-18 11:42:26,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399281744] [2019-12-18 11:42:26,517 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:26,572 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:26,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:26,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:26,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:26,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:26,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:26,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267074438] [2019-12-18 11:42:26,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:26,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:26,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:26,715 INFO L87 Difference]: Start difference. First operand 118 states and 271 transitions. Second operand 16 states. [2019-12-18 11:42:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:27,124 INFO L93 Difference]: Finished difference Result 193 states and 408 transitions. [2019-12-18 11:42:27,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:42:27,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:27,126 INFO L225 Difference]: With dead ends: 193 [2019-12-18 11:42:27,126 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 11:42:27,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:42:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 11:42:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 120. [2019-12-18 11:42:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:42:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-18 11:42:27,130 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-18 11:42:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:27,130 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-18 11:42:27,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-18 11:42:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:27,131 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:27,131 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:27,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:27,335 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash 37839874, now seen corresponding path program 47 times [2019-12-18 11:42:27,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:27,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97726047] [2019-12-18 11:42:27,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:27,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97726047] [2019-12-18 11:42:27,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799077164] [2019-12-18 11:42:27,442 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:27,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:27,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:27,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:27,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:27,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:27,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:27,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505569303] [2019-12-18 11:42:27,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:27,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:27,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:27,682 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-18 11:42:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:28,088 INFO L93 Difference]: Finished difference Result 190 states and 411 transitions. [2019-12-18 11:42:28,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:28,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:28,090 INFO L225 Difference]: With dead ends: 190 [2019-12-18 11:42:28,090 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:42:28,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:42:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2019-12-18 11:42:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:42:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-18 11:42:28,094 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-18 11:42:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:28,094 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-18 11:42:28,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-18 11:42:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:28,095 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:28,095 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:28,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:28,298 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash 37842664, now seen corresponding path program 48 times [2019-12-18 11:42:28,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:28,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141127281] [2019-12-18 11:42:28,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:28,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141127281] [2019-12-18 11:42:28,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843663276] [2019-12-18 11:42:28,389 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:28,432 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:28,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:28,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:28,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:28,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:28,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:28,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247202537] [2019-12-18 11:42:28,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:28,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:28,533 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-18 11:42:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:28,836 INFO L93 Difference]: Finished difference Result 191 states and 415 transitions. [2019-12-18 11:42:28,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:28,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:28,838 INFO L225 Difference]: With dead ends: 191 [2019-12-18 11:42:28,838 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 11:42:28,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 11:42:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 120. [2019-12-18 11:42:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:42:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-18 11:42:28,842 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-18 11:42:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:28,842 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-18 11:42:28,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-18 11:42:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:28,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:28,843 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:29,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:29,046 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash 37842757, now seen corresponding path program 49 times [2019-12-18 11:42:29,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:29,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391534374] [2019-12-18 11:42:29,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:29,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391534374] [2019-12-18 11:42:29,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601114711] [2019-12-18 11:42:29,127 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:29,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:29,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:29,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:29,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:29,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236532880] [2019-12-18 11:42:29,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:29,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:29,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:29,283 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-18 11:42:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:29,674 INFO L93 Difference]: Finished difference Result 190 states and 405 transitions. [2019-12-18 11:42:29,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:42:29,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:29,676 INFO L225 Difference]: With dead ends: 190 [2019-12-18 11:42:29,676 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:42:29,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:42:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 123. [2019-12-18 11:42:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-18 11:42:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-18 11:42:29,680 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 13 [2019-12-18 11:42:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:29,680 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-18 11:42:29,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-18 11:42:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:29,681 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:29,681 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:29,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:29,884 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash 37929154, now seen corresponding path program 50 times [2019-12-18 11:42:29,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:29,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070951001] [2019-12-18 11:42:29,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:29,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070951001] [2019-12-18 11:42:29,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811999789] [2019-12-18 11:42:29,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:30,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:30,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:30,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:30,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:30,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856524037] [2019-12-18 11:42:30,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:30,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:30,100 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 16 states. [2019-12-18 11:42:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:30,536 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2019-12-18 11:42:30,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:30,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:30,538 INFO L225 Difference]: With dead ends: 193 [2019-12-18 11:42:30,538 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 11:42:30,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 11:42:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 120. [2019-12-18 11:42:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:42:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-18 11:42:30,542 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-18 11:42:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:30,542 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-18 11:42:30,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-18 11:42:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:30,543 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:30,543 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:30,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,744 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash 974481212, now seen corresponding path program 51 times [2019-12-18 11:42:30,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:30,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34076529] [2019-12-18 11:42:30,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34076529] [2019-12-18 11:42:30,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443264786] [2019-12-18 11:42:30,815 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:30,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:30,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:30,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:30,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:30,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:30,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:30,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135311210] [2019-12-18 11:42:30,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:30,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:30,963 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-18 11:42:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:31,275 INFO L93 Difference]: Finished difference Result 159 states and 343 transitions. [2019-12-18 11:42:31,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 11:42:31,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:31,277 INFO L225 Difference]: With dead ends: 159 [2019-12-18 11:42:31,277 INFO L226 Difference]: Without dead ends: 158 [2019-12-18 11:42:31,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-18 11:42:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2019-12-18 11:42:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 11:42:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-18 11:42:31,281 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-18 11:42:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:31,281 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-18 11:42:31,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-18 11:42:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:31,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:31,281 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:31,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:31,482 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash 974484002, now seen corresponding path program 52 times [2019-12-18 11:42:31,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:31,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48148116] [2019-12-18 11:42:31,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:31,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48148116] [2019-12-18 11:42:31,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461126192] [2019-12-18 11:42:31,580 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:31,648 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:31,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:31,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:31,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:32,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:32,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:32,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275309568] [2019-12-18 11:42:32,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:32,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:32,210 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-18 11:42:32,455 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-18 11:42:33,063 WARN L192 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 11:42:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:33,118 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2019-12-18 11:42:33,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:33,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:33,120 INFO L225 Difference]: With dead ends: 172 [2019-12-18 11:42:33,120 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 11:42:33,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 11:42:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 120. [2019-12-18 11:42:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 11:42:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-18 11:42:33,124 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-18 11:42:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:33,125 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-18 11:42:33,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-18 11:42:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:33,125 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:33,126 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:33,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:33,329 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash 974484095, now seen corresponding path program 53 times [2019-12-18 11:42:33,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:33,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837561354] [2019-12-18 11:42:33,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:33,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837561354] [2019-12-18 11:42:33,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421921382] [2019-12-18 11:42:33,404 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:33,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:42:33,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:33,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:33,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:33,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:33,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:33,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648702153] [2019-12-18 11:42:33,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:33,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:33,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:33,558 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-18 11:42:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:33,897 INFO L93 Difference]: Finished difference Result 164 states and 348 transitions. [2019-12-18 11:42:33,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:33,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:33,899 INFO L225 Difference]: With dead ends: 164 [2019-12-18 11:42:33,899 INFO L226 Difference]: Without dead ends: 163 [2019-12-18 11:42:33,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-18 11:42:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 119. [2019-12-18 11:42:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 11:42:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 275 transitions. [2019-12-18 11:42:33,903 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 275 transitions. Word has length 13 [2019-12-18 11:42:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:33,903 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 275 transitions. [2019-12-18 11:42:33,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 275 transitions. [2019-12-18 11:42:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:33,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:33,904 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:34,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:34,107 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 974573468, now seen corresponding path program 54 times [2019-12-18 11:42:34,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:34,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531126299] [2019-12-18 11:42:34,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:34,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531126299] [2019-12-18 11:42:34,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808995698] [2019-12-18 11:42:34,190 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:34,233 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:42:34,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:34,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:34,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:34,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:34,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:34,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888247616] [2019-12-18 11:42:34,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:34,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:34,349 INFO L87 Difference]: Start difference. First operand 119 states and 275 transitions. Second operand 16 states. [2019-12-18 11:42:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:34,754 INFO L93 Difference]: Finished difference Result 171 states and 359 transitions. [2019-12-18 11:42:34,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:34,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:34,756 INFO L225 Difference]: With dead ends: 171 [2019-12-18 11:42:34,756 INFO L226 Difference]: Without dead ends: 169 [2019-12-18 11:42:34,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-18 11:42:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-18 11:42:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 116. [2019-12-18 11:42:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-18 11:42:34,760 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-18 11:42:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:34,760 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-18 11:42:34,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-18 11:42:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:34,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:34,761 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:34,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:34,962 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1060457945, now seen corresponding path program 55 times [2019-12-18 11:42:34,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:34,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335723605] [2019-12-18 11:42:34,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335723605] [2019-12-18 11:42:35,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257260345] [2019-12-18 11:42:35,040 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:35,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:35,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:35,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:35,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:35,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361285646] [2019-12-18 11:42:35,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:35,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:35,199 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-18 11:42:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:35,678 INFO L93 Difference]: Finished difference Result 178 states and 371 transitions. [2019-12-18 11:42:35,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:42:35,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:35,681 INFO L225 Difference]: With dead ends: 178 [2019-12-18 11:42:35,681 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 11:42:35,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 11:42:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 117. [2019-12-18 11:42:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 11:42:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-18 11:42:35,686 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-18 11:42:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:35,687 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-18 11:42:35,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-18 11:42:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:35,688 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:35,688 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:35,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:35,893 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:35,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1060458038, now seen corresponding path program 56 times [2019-12-18 11:42:35,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:35,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987452526] [2019-12-18 11:42:35,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:36,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987452526] [2019-12-18 11:42:36,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282320263] [2019-12-18 11:42:36,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:36,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:36,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:36,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:36,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:36,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:36,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228520455] [2019-12-18 11:42:36,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:36,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:36,222 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 16 states. [2019-12-18 11:42:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:36,508 INFO L93 Difference]: Finished difference Result 173 states and 361 transitions. [2019-12-18 11:42:36,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:36,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:36,510 INFO L225 Difference]: With dead ends: 173 [2019-12-18 11:42:36,510 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 11:42:36,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-18 11:42:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 11:42:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2019-12-18 11:42:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-18 11:42:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-18 11:42:36,513 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-18 11:42:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:36,513 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-18 11:42:36,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-18 11:42:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:36,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:36,514 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:36,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,715 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460828, now seen corresponding path program 57 times [2019-12-18 11:42:36,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:36,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594215240] [2019-12-18 11:42:36,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:36,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594215240] [2019-12-18 11:42:36,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910045572] [2019-12-18 11:42:36,820 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:36,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:36,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:36,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:36,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:37,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:37,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:37,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517401153] [2019-12-18 11:42:37,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:37,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:37,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:37,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:37,063 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-18 11:42:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:37,558 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2019-12-18 11:42:37,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:42:37,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:37,560 INFO L225 Difference]: With dead ends: 172 [2019-12-18 11:42:37,560 INFO L226 Difference]: Without dead ends: 170 [2019-12-18 11:42:37,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-18 11:42:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 115. [2019-12-18 11:42:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 11:42:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-18 11:42:37,563 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-18 11:42:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:37,564 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-18 11:42:37,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-18 11:42:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:37,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:37,564 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:37,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:37,768 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:37,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:37,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231484, now seen corresponding path program 58 times [2019-12-18 11:42:37,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:37,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445022522] [2019-12-18 11:42:37,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:37,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445022522] [2019-12-18 11:42:37,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739760037] [2019-12-18 11:42:37,842 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:37,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:37,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:37,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:42:37,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:37,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:37,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 11:42:37,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957231788] [2019-12-18 11:42:37,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 11:42:37,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 11:42:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:42:37,992 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 16 states. [2019-12-18 11:42:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:38,278 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2019-12-18 11:42:38,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 11:42:38,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 11:42:38,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:38,279 INFO L225 Difference]: With dead ends: 142 [2019-12-18 11:42:38,280 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 11:42:38,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-18 11:42:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 11:42:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2019-12-18 11:42:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-18 11:42:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2019-12-18 11:42:38,283 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 13 [2019-12-18 11:42:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:38,283 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2019-12-18 11:42:38,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 11:42:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2019-12-18 11:42:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:42:38,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:38,284 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:38,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:38,487 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1765472381, now seen corresponding path program 7 times [2019-12-18 11:42:38,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:38,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204734501] [2019-12-18 11:42:38,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:38,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204734501] [2019-12-18 11:42:38,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931736264] [2019-12-18 11:42:38,584 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:38,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:38,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:38,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:38,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:38,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247554757] [2019-12-18 11:42:38,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:38,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:38,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:38,745 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand 18 states. [2019-12-18 11:42:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:38,950 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2019-12-18 11:42:38,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:42:38,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-18 11:42:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:38,952 INFO L225 Difference]: With dead ends: 135 [2019-12-18 11:42:38,952 INFO L226 Difference]: Without dead ends: 134 [2019-12-18 11:42:38,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-18 11:42:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-18 11:42:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2019-12-18 11:42:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 11:42:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2019-12-18 11:42:38,956 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 13 [2019-12-18 11:42:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:38,957 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2019-12-18 11:42:38,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2019-12-18 11:42:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:38,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:38,957 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:39,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:39,160 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash 689055580, now seen corresponding path program 8 times [2019-12-18 11:42:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:39,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605293400] [2019-12-18 11:42:39,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:39,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605293400] [2019-12-18 11:42:39,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118029953] [2019-12-18 11:42:39,320 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:39,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:39,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:39,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:42:39,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:39,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:39,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-18 11:42:39,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253656484] [2019-12-18 11:42:39,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 11:42:39,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 11:42:39,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:42:39,633 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand 20 states. [2019-12-18 11:42:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:39,899 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-18 11:42:39,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:42:39,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2019-12-18 11:42:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:39,900 INFO L225 Difference]: With dead ends: 146 [2019-12-18 11:42:39,900 INFO L226 Difference]: Without dead ends: 145 [2019-12-18 11:42:39,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2019-12-18 11:42:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-18 11:42:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2019-12-18 11:42:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:42:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:42:39,903 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:42:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:39,904 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:42:39,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 11:42:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:42:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:39,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:39,904 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:40,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:40,108 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:40,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:40,108 INFO L82 PathProgramCache]: Analyzing trace with hash 663066358, now seen corresponding path program 59 times [2019-12-18 11:42:40,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:40,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244905593] [2019-12-18 11:42:40,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:40,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244905593] [2019-12-18 11:42:40,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828250572] [2019-12-18 11:42:40,212 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:40,258 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:42:40,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:40,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:40,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:40,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:40,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:40,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678735925] [2019-12-18 11:42:40,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:40,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:40,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:40,386 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:42:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:40,775 INFO L93 Difference]: Finished difference Result 167 states and 353 transitions. [2019-12-18 11:42:40,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:42:40,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:40,777 INFO L225 Difference]: With dead ends: 167 [2019-12-18 11:42:40,777 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 11:42:40,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:42:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 11:42:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-18 11:42:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:42:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:42:40,781 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:42:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:40,781 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:42:40,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:42:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:40,781 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:40,781 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:40,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:40,982 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:40,983 INFO L82 PathProgramCache]: Analyzing trace with hash -117422285, now seen corresponding path program 60 times [2019-12-18 11:42:40,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:40,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566676232] [2019-12-18 11:42:40,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:41,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566676232] [2019-12-18 11:42:41,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362108878] [2019-12-18 11:42:41,080 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:41,122 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:42:41,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:41,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:41,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:41,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:41,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:41,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617180367] [2019-12-18 11:42:41,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:41,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:41,277 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:42:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:41,749 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2019-12-18 11:42:41,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:41,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:41,751 INFO L225 Difference]: With dead ends: 187 [2019-12-18 11:42:41,751 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 11:42:41,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:42:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 11:42:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-12-18 11:42:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:42:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:42:41,755 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:42:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:41,755 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:42:41,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:42:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:41,755 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:41,756 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:41,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:41,959 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:41,960 INFO L82 PathProgramCache]: Analyzing trace with hash -117422192, now seen corresponding path program 61 times [2019-12-18 11:42:41,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:41,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12489467] [2019-12-18 11:42:41,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:42,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12489467] [2019-12-18 11:42:42,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146857665] [2019-12-18 11:42:42,063 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:42,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:42,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:44,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:44,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:44,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143488752] [2019-12-18 11:42:44,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:44,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:44,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=232, Unknown=4, NotChecked=0, Total=306 [2019-12-18 11:42:44,146 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:42:44,872 WARN L192 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-18 11:42:48,073 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-18 11:42:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:48,613 INFO L93 Difference]: Finished difference Result 189 states and 393 transitions. [2019-12-18 11:42:48,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:42:48,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:48,615 INFO L225 Difference]: With dead ends: 189 [2019-12-18 11:42:48,615 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 11:42:48,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=274, Invalid=652, Unknown=4, NotChecked=0, Total=930 [2019-12-18 11:42:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 11:42:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2019-12-18 11:42:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:42:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:42:48,619 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:42:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:48,619 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:42:48,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:42:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:48,620 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:48,620 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:48,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:48,823 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233558, now seen corresponding path program 62 times [2019-12-18 11:42:48,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:48,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147421296] [2019-12-18 11:42:48,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:48,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147421296] [2019-12-18 11:42:48,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980566923] [2019-12-18 11:42:48,959 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:42:49,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:49,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:49,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:49,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:49,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381819252] [2019-12-18 11:42:49,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:49,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:49,201 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:42:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:49,639 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2019-12-18 11:42:49,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:49,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:49,640 INFO L225 Difference]: With dead ends: 187 [2019-12-18 11:42:49,641 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 11:42:49,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:42:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 11:42:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-12-18 11:42:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:42:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:42:49,649 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:42:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:49,650 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:42:49,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:42:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:49,650 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:49,651 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:49,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,854 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233651, now seen corresponding path program 63 times [2019-12-18 11:42:49,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:49,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162409306] [2019-12-18 11:42:49,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:49,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162409306] [2019-12-18 11:42:49,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137683754] [2019-12-18 11:42:49,957 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:49,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:42:50,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:50,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:50,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:50,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:50,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:50,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602383904] [2019-12-18 11:42:50,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:50,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:42:50,161 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:42:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:50,685 INFO L93 Difference]: Finished difference Result 198 states and 417 transitions. [2019-12-18 11:42:50,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:50,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:50,687 INFO L225 Difference]: With dead ends: 198 [2019-12-18 11:42:50,687 INFO L226 Difference]: Without dead ends: 197 [2019-12-18 11:42:50,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:42:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-18 11:42:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2019-12-18 11:42:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:42:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-18 11:42:50,691 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-18 11:42:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:50,691 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-18 11:42:50,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-18 11:42:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:50,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:50,692 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:50,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:50,892 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236441, now seen corresponding path program 64 times [2019-12-18 11:42:50,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:50,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142779472] [2019-12-18 11:42:50,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:50,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142779472] [2019-12-18 11:42:50,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719998715] [2019-12-18 11:42:50,980 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:51,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:42:51,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:51,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:51,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:53,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:53,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:53,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515969036] [2019-12-18 11:42:53,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:53,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:53,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:53,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=231, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:42:53,060 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 18 states. [2019-12-18 11:42:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:54,561 INFO L93 Difference]: Finished difference Result 202 states and 424 transitions. [2019-12-18 11:42:54,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:42:54,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:54,562 INFO L225 Difference]: With dead ends: 202 [2019-12-18 11:42:54,562 INFO L226 Difference]: Without dead ends: 201 [2019-12-18 11:42:54,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=301, Invalid=686, Unknown=5, NotChecked=0, Total=992 [2019-12-18 11:42:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-18 11:42:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2019-12-18 11:42:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 11:42:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-18 11:42:54,564 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-18 11:42:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:54,565 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-18 11:42:54,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-18 11:42:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:54,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:54,565 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:54,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:54,766 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236534, now seen corresponding path program 65 times [2019-12-18 11:42:54,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:54,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853257711] [2019-12-18 11:42:54,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:54,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853257711] [2019-12-18 11:42:54,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110491342] [2019-12-18 11:42:54,860 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:54,918 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:42:54,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:42:54,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:42:54,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:42:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:57,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:42:57,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:42:57,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166306174] [2019-12-18 11:42:57,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:42:57,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:42:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:42:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-12-18 11:42:57,579 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 18 states. [2019-12-18 11:42:57,907 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-18 11:42:58,612 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-18 11:42:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:42:59,675 INFO L93 Difference]: Finished difference Result 196 states and 409 transitions. [2019-12-18 11:42:59,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:42:59,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:42:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:42:59,677 INFO L225 Difference]: With dead ends: 196 [2019-12-18 11:42:59,677 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 11:42:59,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=311, Invalid=675, Unknown=6, NotChecked=0, Total=992 [2019-12-18 11:42:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 11:42:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 124. [2019-12-18 11:42:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:42:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:42:59,681 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:42:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:42:59,681 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:42:59,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:42:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:42:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:42:59,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:42:59,682 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:42:59,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:42:59,885 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:42:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:42:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042861, now seen corresponding path program 66 times [2019-12-18 11:42:59,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:42:59,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334388337] [2019-12-18 11:42:59,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:42:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:42:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:42:59,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334388337] [2019-12-18 11:42:59,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362341692] [2019-12-18 11:42:59,985 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:00,028 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:00,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:00,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:00,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:00,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:00,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:00,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319795105] [2019-12-18 11:43:00,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:00,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:00,164 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:43:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:00,683 INFO L93 Difference]: Finished difference Result 192 states and 403 transitions. [2019-12-18 11:43:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 11:43:00,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:00,685 INFO L225 Difference]: With dead ends: 192 [2019-12-18 11:43:00,686 INFO L226 Difference]: Without dead ends: 190 [2019-12-18 11:43:00,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:43:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-18 11:43:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 124. [2019-12-18 11:43:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 11:43:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-18 11:43:00,689 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-18 11:43:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:00,690 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-18 11:43:00,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-18 11:43:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:00,690 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:00,690 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:00,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:00,891 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042768, now seen corresponding path program 67 times [2019-12-18 11:43:00,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:00,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332425756] [2019-12-18 11:43:00,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:00,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332425756] [2019-12-18 11:43:00,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567488135] [2019-12-18 11:43:00,981 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:01,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:01,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:01,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:01,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:01,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715436056] [2019-12-18 11:43:01,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:01,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:01,405 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-18 11:43:02,475 WARN L192 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2019-12-18 11:43:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:02,749 INFO L93 Difference]: Finished difference Result 209 states and 441 transitions. [2019-12-18 11:43:02,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:02,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:02,751 INFO L225 Difference]: With dead ends: 209 [2019-12-18 11:43:02,751 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:43:02,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=352, Invalid=769, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 11:43:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:43:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2019-12-18 11:43:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 11:43:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-18 11:43:02,755 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-18 11:43:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:02,756 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-18 11:43:02,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-18 11:43:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:02,756 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:02,757 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:02,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:02,957 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039978, now seen corresponding path program 68 times [2019-12-18 11:43:02,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:02,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755276887] [2019-12-18 11:43:02,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:03,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755276887] [2019-12-18 11:43:03,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810805707] [2019-12-18 11:43:03,049 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:03,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:03,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:03,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:03,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:04,206 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_287 Int)) (and (<= c_~i~0 (+ (* 3 v_~i~0_287) 1)) (<= (div (+ (* v_~i~0_287 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~i~0_287) c_~i~0 1)))) is different from true [2019-12-18 11:43:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:04,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:04,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:04,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971924544] [2019-12-18 11:43:04,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:04,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=204, Unknown=2, NotChecked=30, Total=306 [2019-12-18 11:43:04,208 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 18 states. [2019-12-18 11:43:04,811 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-18 11:43:05,548 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2019-12-18 11:43:06,185 WARN L192 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 11:43:07,149 WARN L192 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2019-12-18 11:43:07,814 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-12-18 11:43:10,421 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:43:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:10,446 INFO L93 Difference]: Finished difference Result 205 states and 434 transitions. [2019-12-18 11:43:10,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:43:10,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:10,448 INFO L225 Difference]: With dead ends: 205 [2019-12-18 11:43:10,449 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 11:43:10,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=376, Invalid=812, Unknown=6, NotChecked=66, Total=1260 [2019-12-18 11:43:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 11:43:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 129. [2019-12-18 11:43:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:43:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-18 11:43:10,452 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-18 11:43:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:10,452 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-18 11:43:10,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-18 11:43:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:10,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:10,453 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:10,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:10,654 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039885, now seen corresponding path program 69 times [2019-12-18 11:43:10,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:10,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263133938] [2019-12-18 11:43:10,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:10,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263133938] [2019-12-18 11:43:10,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362132771] [2019-12-18 11:43:10,742 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:10,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:43:10,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:10,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:10,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:11,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:11,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:11,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901053110] [2019-12-18 11:43:11,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:11,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:11,854 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-18 11:43:12,690 WARN L192 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-12-18 11:43:13,700 WARN L192 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2019-12-18 11:43:16,176 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 11:43:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:16,434 INFO L93 Difference]: Finished difference Result 213 states and 448 transitions. [2019-12-18 11:43:16,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:16,435 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:16,436 INFO L225 Difference]: With dead ends: 213 [2019-12-18 11:43:16,436 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 11:43:16,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=378, Invalid=809, Unknown=3, NotChecked=0, Total=1190 [2019-12-18 11:43:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 11:43:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 128. [2019-12-18 11:43:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 11:43:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 298 transitions. [2019-12-18 11:43:16,440 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 298 transitions. Word has length 14 [2019-12-18 11:43:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:16,440 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 298 transitions. [2019-12-18 11:43:16,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 298 transitions. [2019-12-18 11:43:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:16,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:16,442 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:16,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:16,644 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953488, now seen corresponding path program 70 times [2019-12-18 11:43:16,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:16,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305778277] [2019-12-18 11:43:16,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:16,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305778277] [2019-12-18 11:43:16,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201663604] [2019-12-18 11:43:16,744 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:16,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:16,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:16,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:16,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:19,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:19,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:19,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882212860] [2019-12-18 11:43:19,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:19,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:43:19,398 INFO L87 Difference]: Start difference. First operand 128 states and 298 transitions. Second operand 18 states. [2019-12-18 11:43:21,133 WARN L192 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-18 11:43:21,656 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 11:43:22,663 WARN L192 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-18 11:43:23,364 WARN L192 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 11:43:24,687 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 11:43:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:25,538 INFO L93 Difference]: Finished difference Result 212 states and 449 transitions. [2019-12-18 11:43:25,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:43:25,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:25,540 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:43:25,540 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 11:43:25,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=322, Invalid=795, Unknown=5, NotChecked=0, Total=1122 [2019-12-18 11:43:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 11:43:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2019-12-18 11:43:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:43:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-18 11:43:25,543 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-18 11:43:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:25,544 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-18 11:43:25,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-18 11:43:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:25,544 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:25,545 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:25,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,748 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:25,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953395, now seen corresponding path program 71 times [2019-12-18 11:43:25,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:25,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082175352] [2019-12-18 11:43:25,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:25,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082175352] [2019-12-18 11:43:25,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004220360] [2019-12-18 11:43:25,840 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:25,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:43:25,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:25,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:25,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:26,746 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_300 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_300) 1)) (<= c_~j~0 (+ v_~i~0_300 c_~i~0 1)) (<= (div (+ (* v_~i~0_300 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 11:43:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-18 11:43:27,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:27,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:27,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138364635] [2019-12-18 11:43:27,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:27,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:27,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=201, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:43:27,226 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-18 11:43:27,666 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2019-12-18 11:43:29,757 WARN L192 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 11:43:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:32,863 INFO L93 Difference]: Finished difference Result 212 states and 455 transitions. [2019-12-18 11:43:32,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:32,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:32,865 INFO L225 Difference]: With dead ends: 212 [2019-12-18 11:43:32,865 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 11:43:32,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=286, Invalid=641, Unknown=7, NotChecked=58, Total=992 [2019-12-18 11:43:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 11:43:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 129. [2019-12-18 11:43:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:43:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-18 11:43:32,869 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-18 11:43:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:32,869 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-18 11:43:32,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-18 11:43:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:32,870 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:32,870 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:33,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:33,071 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950605, now seen corresponding path program 72 times [2019-12-18 11:43:33,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:33,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757541758] [2019-12-18 11:43:33,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:33,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757541758] [2019-12-18 11:43:33,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954874535] [2019-12-18 11:43:33,181 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:33,225 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:43:33,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:33,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:33,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:35,765 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_305 Int)) (and (<= c_~j~0 (+ v_~i~0_305 c_~i~0 1)) (<= (div (+ v_~i~0_305 (- c_~i~0)) (- 2)) (+ v_~i~0_305 1)) (<= (div (+ (* v_~i~0_305 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 11:43:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:35,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:35,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:35,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441148866] [2019-12-18 11:43:35,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:35,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=202, Unknown=2, NotChecked=30, Total=306 [2019-12-18 11:43:35,767 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-18 11:43:36,793 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 11:43:43,338 WARN L192 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-12-18 11:43:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:43,361 INFO L93 Difference]: Finished difference Result 206 states and 444 transitions. [2019-12-18 11:43:43,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:43:43,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:43,363 INFO L225 Difference]: With dead ends: 206 [2019-12-18 11:43:43,363 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 11:43:43,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=303, Invalid=752, Unknown=5, NotChecked=62, Total=1122 [2019-12-18 11:43:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 11:43:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 127. [2019-12-18 11:43:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 11:43:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-18 11:43:43,367 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-18 11:43:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:43,367 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-18 11:43:43,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-18 11:43:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:43,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:43,368 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:43,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:43,571 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 147736953, now seen corresponding path program 73 times [2019-12-18 11:43:43,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:43,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715548236] [2019-12-18 11:43:43,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:43,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715548236] [2019-12-18 11:43:43,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235726286] [2019-12-18 11:43:43,666 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:43,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:43,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:43,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:43,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:43,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584618216] [2019-12-18 11:43:43,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:43,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:43,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:43,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:43,900 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 18 states. [2019-12-18 11:43:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:44,666 INFO L93 Difference]: Finished difference Result 225 states and 472 transitions. [2019-12-18 11:43:44,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:43:44,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:44,668 INFO L225 Difference]: With dead ends: 225 [2019-12-18 11:43:44,668 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:43:44,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:43:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:43:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 131. [2019-12-18 11:43:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 11:43:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-18 11:43:44,671 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 14 [2019-12-18 11:43:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:44,671 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-18 11:43:44,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-18 11:43:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:44,672 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:44,672 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:44,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:44,873 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash 147737046, now seen corresponding path program 74 times [2019-12-18 11:43:44,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:44,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384217598] [2019-12-18 11:43:44,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:44,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384217598] [2019-12-18 11:43:44,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380561638] [2019-12-18 11:43:44,993 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:45,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:43:45,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:45,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:45,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:45,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:45,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:45,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202791853] [2019-12-18 11:43:45,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:45,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:45,225 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 18 states. [2019-12-18 11:43:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:45,939 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2019-12-18 11:43:45,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:43:45,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:45,941 INFO L225 Difference]: With dead ends: 223 [2019-12-18 11:43:45,942 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:43:45,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:43:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:43:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 130. [2019-12-18 11:43:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-18 11:43:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 306 transitions. [2019-12-18 11:43:45,945 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 306 transitions. Word has length 14 [2019-12-18 11:43:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:45,945 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 306 transitions. [2019-12-18 11:43:45,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 306 transitions. [2019-12-18 11:43:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:45,946 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:45,946 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:46,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:46,147 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash 147823443, now seen corresponding path program 75 times [2019-12-18 11:43:46,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:46,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740533665] [2019-12-18 11:43:46,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:46,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740533665] [2019-12-18 11:43:46,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238751154] [2019-12-18 11:43:46,241 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:46,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:43:46,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:46,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:46,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:46,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:46,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:46,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880076349] [2019-12-18 11:43:46,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:46,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:46,576 INFO L87 Difference]: Start difference. First operand 130 states and 306 transitions. Second operand 18 states. [2019-12-18 11:43:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:47,497 INFO L93 Difference]: Finished difference Result 225 states and 472 transitions. [2019-12-18 11:43:47,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:47,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:47,499 INFO L225 Difference]: With dead ends: 225 [2019-12-18 11:43:47,499 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:43:47,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:43:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:43:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 130. [2019-12-18 11:43:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-18 11:43:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 306 transitions. [2019-12-18 11:43:47,502 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 306 transitions. Word has length 14 [2019-12-18 11:43:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:47,503 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 306 transitions. [2019-12-18 11:43:47,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 306 transitions. [2019-12-18 11:43:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:47,503 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:47,503 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:47,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:47,704 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash 147823536, now seen corresponding path program 76 times [2019-12-18 11:43:47,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:47,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469579469] [2019-12-18 11:43:47,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:47,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469579469] [2019-12-18 11:43:47,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326344156] [2019-12-18 11:43:47,796 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:47,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:43:47,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:47,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:47,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:48,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:48,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:48,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281814207] [2019-12-18 11:43:48,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:48,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:48,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:48,059 INFO L87 Difference]: Start difference. First operand 130 states and 306 transitions. Second operand 18 states. [2019-12-18 11:43:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:43:48,775 INFO L93 Difference]: Finished difference Result 235 states and 500 transitions. [2019-12-18 11:43:48,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:43:48,775 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:43:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:43:48,776 INFO L225 Difference]: With dead ends: 235 [2019-12-18 11:43:48,776 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 11:43:48,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:43:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 11:43:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 134. [2019-12-18 11:43:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:43:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-18 11:43:48,779 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-18 11:43:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:43:48,779 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-18 11:43:48,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:43:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-18 11:43:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:43:48,780 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:43:48,780 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:43:48,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:48,981 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:43:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:43:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash 147826326, now seen corresponding path program 77 times [2019-12-18 11:43:48,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:43:48,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743698566] [2019-12-18 11:43:48,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:43:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:43:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:49,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743698566] [2019-12-18 11:43:49,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601087139] [2019-12-18 11:43:49,089 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:43:49,146 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:43:49,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:43:49,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:43:49,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:43:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:43:51,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:43:51,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:43:51,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448787742] [2019-12-18 11:43:51,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:43:51,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:43:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:43:51,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:43:51,533 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-18 11:43:57,161 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 11:44:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:01,208 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2019-12-18 11:44:01,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 11:44:01,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:01,210 INFO L225 Difference]: With dead ends: 228 [2019-12-18 11:44:01,210 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 11:44:01,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:44:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 11:44:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2019-12-18 11:44:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:44:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-18 11:44:01,214 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-18 11:44:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:01,214 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-18 11:44:01,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-18 11:44:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:01,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:01,215 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:01,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:01,415 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:01,416 INFO L82 PathProgramCache]: Analyzing trace with hash 150504633, now seen corresponding path program 78 times [2019-12-18 11:44:01,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:01,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493157878] [2019-12-18 11:44:01,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:01,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493157878] [2019-12-18 11:44:01,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837716709] [2019-12-18 11:44:01,532 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:01,573 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:44:01,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:01,574 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:01,575 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:01,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:01,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:01,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209145107] [2019-12-18 11:44:01,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:01,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:01,796 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-18 11:44:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:02,790 INFO L93 Difference]: Finished difference Result 205 states and 442 transitions. [2019-12-18 11:44:02,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 11:44:02,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:02,793 INFO L225 Difference]: With dead ends: 205 [2019-12-18 11:44:02,793 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 11:44:02,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 11:44:02,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 11:44:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 134. [2019-12-18 11:44:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:44:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-18 11:44:02,796 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-18 11:44:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:02,796 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-18 11:44:02,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-18 11:44:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:02,797 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:02,797 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:02,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:02,998 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash 150504726, now seen corresponding path program 79 times [2019-12-18 11:44:02,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:02,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744925557] [2019-12-18 11:44:02,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:03,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744925557] [2019-12-18 11:44:03,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996944761] [2019-12-18 11:44:03,095 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:03,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:03,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:07,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:07,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:07,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288059777] [2019-12-18 11:44:07,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:07,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:07,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:44:07,449 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-18 11:44:09,911 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 11:44:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:17,740 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-18 11:44:17,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:44:17,741 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:17,743 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:44:17,743 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:44:17,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=271, Invalid=655, Unknown=4, NotChecked=0, Total=930 [2019-12-18 11:44:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:44:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 135. [2019-12-18 11:44:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:44:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 326 transitions. [2019-12-18 11:44:17,747 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 326 transitions. Word has length 14 [2019-12-18 11:44:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:17,747 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 326 transitions. [2019-12-18 11:44:17,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 326 transitions. [2019-12-18 11:44:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:17,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:17,747 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:17,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:17,948 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 150507516, now seen corresponding path program 80 times [2019-12-18 11:44:17,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:17,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925746186] [2019-12-18 11:44:17,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:18,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925746186] [2019-12-18 11:44:18,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162160204] [2019-12-18 11:44:18,050 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:18,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:18,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:18,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:18,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:18,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:18,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:18,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649285104] [2019-12-18 11:44:18,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:18,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:18,373 INFO L87 Difference]: Start difference. First operand 135 states and 326 transitions. Second operand 18 states. [2019-12-18 11:44:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:19,046 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-18 11:44:19,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:19,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:19,048 INFO L225 Difference]: With dead ends: 207 [2019-12-18 11:44:19,048 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 11:44:19,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 11:44:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 134. [2019-12-18 11:44:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:44:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-18 11:44:19,052 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-18 11:44:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:19,052 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-18 11:44:19,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-18 11:44:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:19,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:19,053 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:19,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:19,256 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:19,256 INFO L82 PathProgramCache]: Analyzing trace with hash 150507609, now seen corresponding path program 81 times [2019-12-18 11:44:19,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:19,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443572093] [2019-12-18 11:44:19,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:19,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443572093] [2019-12-18 11:44:19,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344374021] [2019-12-18 11:44:19,383 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:19,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:19,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:19,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:19,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:19,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:19,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:19,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973825073] [2019-12-18 11:44:19,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:19,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:19,691 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-18 11:44:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:20,585 INFO L93 Difference]: Finished difference Result 224 states and 486 transitions. [2019-12-18 11:44:20,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 11:44:20,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:20,587 INFO L225 Difference]: With dead ends: 224 [2019-12-18 11:44:20,587 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 11:44:20,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 11:44:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 11:44:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 134. [2019-12-18 11:44:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:44:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-18 11:44:20,591 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-18 11:44:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:20,591 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-18 11:44:20,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-18 11:44:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:20,592 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:20,592 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:20,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:20,793 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash 150594006, now seen corresponding path program 82 times [2019-12-18 11:44:20,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:20,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647935761] [2019-12-18 11:44:20,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:20,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647935761] [2019-12-18 11:44:20,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054602559] [2019-12-18 11:44:20,901 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:20,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:44:20,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:20,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:20,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:29,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:29,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:29,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185434704] [2019-12-18 11:44:29,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:29,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:29,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:29,356 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-18 11:44:31,776 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-12-18 11:44:32,052 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-12-18 11:44:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:32,553 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2019-12-18 11:44:32,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:44:32,554 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:32,555 INFO L225 Difference]: With dead ends: 210 [2019-12-18 11:44:32,556 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 11:44:32,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:44:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 11:44:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 131. [2019-12-18 11:44:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 11:44:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-18 11:44:32,560 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 14 [2019-12-18 11:44:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:32,560 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-18 11:44:32,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-18 11:44:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:32,560 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:32,560 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:32,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:32,761 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1087145971, now seen corresponding path program 83 times [2019-12-18 11:44:32,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:32,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506900364] [2019-12-18 11:44:32,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:32,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506900364] [2019-12-18 11:44:32,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904899762] [2019-12-18 11:44:32,900 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:32,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:44:32,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:32,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:32,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:33,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:33,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:33,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265764489] [2019-12-18 11:44:33,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:33,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:33,114 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 18 states. [2019-12-18 11:44:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:33,523 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2019-12-18 11:44:33,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:44:33,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:33,525 INFO L225 Difference]: With dead ends: 166 [2019-12-18 11:44:33,525 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 11:44:33,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:44:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 11:44:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2019-12-18 11:44:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:44:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 313 transitions. [2019-12-18 11:44:33,529 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 313 transitions. Word has length 14 [2019-12-18 11:44:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:33,530 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 313 transitions. [2019-12-18 11:44:33,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 313 transitions. [2019-12-18 11:44:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:33,530 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:33,530 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:33,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:33,731 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:33,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1087146064, now seen corresponding path program 84 times [2019-12-18 11:44:33,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:33,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915592383] [2019-12-18 11:44:33,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:33,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915592383] [2019-12-18 11:44:33,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907179821] [2019-12-18 11:44:33,829 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:33,874 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:44:33,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:33,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:33,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:34,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:34,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:34,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359515792] [2019-12-18 11:44:34,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:34,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:34,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:34,021 INFO L87 Difference]: Start difference. First operand 134 states and 313 transitions. Second operand 18 states. [2019-12-18 11:44:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:34,685 INFO L93 Difference]: Finished difference Result 200 states and 423 transitions. [2019-12-18 11:44:34,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:44:34,686 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:34,687 INFO L225 Difference]: With dead ends: 200 [2019-12-18 11:44:34,687 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:44:34,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 11:44:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:44:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2019-12-18 11:44:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 11:44:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 309 transitions. [2019-12-18 11:44:34,691 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 309 transitions. Word has length 14 [2019-12-18 11:44:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:34,692 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 309 transitions. [2019-12-18 11:44:34,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 309 transitions. [2019-12-18 11:44:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:34,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:34,692 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:34,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:34,893 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238320, now seen corresponding path program 85 times [2019-12-18 11:44:34,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:34,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277848862] [2019-12-18 11:44:34,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:34,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277848862] [2019-12-18 11:44:34,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721060924] [2019-12-18 11:44:34,989 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:35,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:35,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:35,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:35,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:35,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618219354] [2019-12-18 11:44:35,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:35,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:44:35,191 INFO L87 Difference]: Start difference. First operand 133 states and 309 transitions. Second operand 18 states. [2019-12-18 11:44:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:35,873 INFO L93 Difference]: Finished difference Result 211 states and 446 transitions. [2019-12-18 11:44:35,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:44:35,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:35,875 INFO L225 Difference]: With dead ends: 211 [2019-12-18 11:44:35,875 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 11:44:35,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 11:44:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 11:44:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2019-12-18 11:44:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:44:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 296 transitions. [2019-12-18 11:44:35,880 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 296 transitions. Word has length 14 [2019-12-18 11:44:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:35,880 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 296 transitions. [2019-12-18 11:44:35,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 296 transitions. [2019-12-18 11:44:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:35,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:35,881 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:36,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:36,083 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916534, now seen corresponding path program 86 times [2019-12-18 11:44:36,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:36,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615809690] [2019-12-18 11:44:36,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:36,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615809690] [2019-12-18 11:44:36,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83020270] [2019-12-18 11:44:36,188 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:36,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:44:36,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:36,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:36,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:36,766 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_292 Int)) (and (<= c_~i~0 (+ v_~j~0_292 2)) (<= (div (+ (* v_~j~0_292 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~j~0_292 c_~i~0)))) is different from true [2019-12-18 11:44:38,542 WARN L192 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:44:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-18 11:44:39,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:39,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:39,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205466732] [2019-12-18 11:44:39,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:39,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=205, Unknown=3, NotChecked=30, Total=306 [2019-12-18 11:44:39,983 INFO L87 Difference]: Start difference. First operand 129 states and 296 transitions. Second operand 18 states. [2019-12-18 11:44:40,695 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-12-18 11:44:40,931 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2019-12-18 11:44:42,991 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 11:44:44,853 WARN L192 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2019-12-18 11:44:45,877 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:44:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:45,931 INFO L93 Difference]: Finished difference Result 222 states and 466 transitions. [2019-12-18 11:44:45,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 11:44:45,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:45,933 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:44:45,934 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:44:45,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=337, Invalid=849, Unknown=8, NotChecked=66, Total=1260 [2019-12-18 11:44:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:44:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 132. [2019-12-18 11:44:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-18 11:44:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 308 transitions. [2019-12-18 11:44:45,939 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 308 transitions. Word has length 14 [2019-12-18 11:44:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:45,939 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 308 transitions. [2019-12-18 11:44:45,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 308 transitions. [2019-12-18 11:44:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:45,940 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:45,940 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:46,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:46,143 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:46,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916627, now seen corresponding path program 87 times [2019-12-18 11:44:46,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:46,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713429972] [2019-12-18 11:44:46,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:46,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713429972] [2019-12-18 11:44:46,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365431157] [2019-12-18 11:44:46,255 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:46,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:44:46,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:44:46,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:44:46,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:44:48,812 WARN L192 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:44:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:51,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:44:51,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:44:51,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115668786] [2019-12-18 11:44:51,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:44:51,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:44:51,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:44:51,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:44:51,077 INFO L87 Difference]: Start difference. First operand 132 states and 308 transitions. Second operand 18 states. [2019-12-18 11:44:56,061 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2019-12-18 11:44:59,326 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 11:44:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:44:59,644 INFO L93 Difference]: Finished difference Result 225 states and 481 transitions. [2019-12-18 11:44:59,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 11:44:59,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:44:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:44:59,646 INFO L225 Difference]: With dead ends: 225 [2019-12-18 11:44:59,646 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 11:44:59,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=342, Invalid=842, Unknown=6, NotChecked=0, Total=1190 [2019-12-18 11:44:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 11:44:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 129. [2019-12-18 11:44:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 11:44:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 296 transitions. [2019-12-18 11:44:59,650 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 296 transitions. Word has length 14 [2019-12-18 11:44:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:44:59,650 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 296 transitions. [2019-12-18 11:44:59,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:44:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 296 transitions. [2019-12-18 11:44:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:44:59,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:44:59,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:44:59,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:44:59,854 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:44:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:44:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919417, now seen corresponding path program 88 times [2019-12-18 11:44:59,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:44:59,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239999952] [2019-12-18 11:44:59,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:44:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:44:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:44:59,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239999952] [2019-12-18 11:44:59,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805490242] [2019-12-18 11:44:59,984 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:00,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:00,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:00,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:00,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:00,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:00,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:00,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241264296] [2019-12-18 11:45:00,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:00,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:00,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:00,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:00,851 INFO L87 Difference]: Start difference. First operand 129 states and 296 transitions. Second operand 18 states. [2019-12-18 11:45:01,296 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 11:45:03,784 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-12-18 11:45:04,624 WARN L192 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 11:45:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:06,238 INFO L93 Difference]: Finished difference Result 227 states and 480 transitions. [2019-12-18 11:45:06,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 11:45:06,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:06,240 INFO L225 Difference]: With dead ends: 227 [2019-12-18 11:45:06,240 INFO L226 Difference]: Without dead ends: 225 [2019-12-18 11:45:06,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=293, Invalid=697, Unknown=2, NotChecked=0, Total=992 [2019-12-18 11:45:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-18 11:45:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 135. [2019-12-18 11:45:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:45:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-18 11:45:06,245 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 14 [2019-12-18 11:45:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:06,245 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-18 11:45:06,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-18 11:45:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:06,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:06,246 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:06,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:06,447 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:06,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919510, now seen corresponding path program 89 times [2019-12-18 11:45:06,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:06,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724279903] [2019-12-18 11:45:06,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:06,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724279903] [2019-12-18 11:45:06,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757713411] [2019-12-18 11:45:06,561 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:06,603 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:06,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:06,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:06,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:07,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:07,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:07,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989803278] [2019-12-18 11:45:07,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:07,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:07,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:07,862 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 18 states. [2019-12-18 11:45:09,158 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-18 11:45:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:09,830 INFO L93 Difference]: Finished difference Result 232 states and 503 transitions. [2019-12-18 11:45:09,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 11:45:09,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:09,831 INFO L225 Difference]: With dead ends: 232 [2019-12-18 11:45:09,831 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 11:45:09,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=319, Invalid=801, Unknown=2, NotChecked=0, Total=1122 [2019-12-18 11:45:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 11:45:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2019-12-18 11:45:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:45:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-18 11:45:09,836 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 14 [2019-12-18 11:45:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:09,836 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-18 11:45:09,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-18 11:45:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:09,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:09,837 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:10,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:10,040 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1090005907, now seen corresponding path program 90 times [2019-12-18 11:45:10,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:10,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113828431] [2019-12-18 11:45:10,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:10,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113828431] [2019-12-18 11:45:10,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103472197] [2019-12-18 11:45:10,136 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:10,178 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:10,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:10,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:10,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:10,597 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:45:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:10,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:10,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:10,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183083284] [2019-12-18 11:45:10,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:10,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:10,648 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 18 states. [2019-12-18 11:45:11,920 WARN L192 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 11:45:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:12,064 INFO L93 Difference]: Finished difference Result 226 states and 482 transitions. [2019-12-18 11:45:12,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 11:45:12,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:12,066 INFO L225 Difference]: With dead ends: 226 [2019-12-18 11:45:12,066 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 11:45:12,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 11:45:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 11:45:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2019-12-18 11:45:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:45:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-18 11:45:12,070 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 14 [2019-12-18 11:45:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:12,070 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-18 11:45:12,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-18 11:45:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:12,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:12,071 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:12,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:12,273 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:12,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1090006000, now seen corresponding path program 91 times [2019-12-18 11:45:12,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:12,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90162299] [2019-12-18 11:45:12,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:12,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90162299] [2019-12-18 11:45:12,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219514491] [2019-12-18 11:45:12,381 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:12,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:12,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:13,081 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 11:45:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:13,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:13,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:13,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64880335] [2019-12-18 11:45:13,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:13,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:13,627 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 18 states. [2019-12-18 11:45:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:14,870 INFO L93 Difference]: Finished difference Result 228 states and 493 transitions. [2019-12-18 11:45:14,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 11:45:14,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:14,872 INFO L225 Difference]: With dead ends: 228 [2019-12-18 11:45:14,872 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 11:45:14,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 11:45:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 11:45:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2019-12-18 11:45:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:45:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 316 transitions. [2019-12-18 11:45:14,875 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 316 transitions. Word has length 14 [2019-12-18 11:45:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:14,875 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 316 transitions. [2019-12-18 11:45:14,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 316 transitions. [2019-12-18 11:45:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:14,876 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:14,876 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:15,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:15,077 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033424, now seen corresponding path program 92 times [2019-12-18 11:45:15,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:15,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843050562] [2019-12-18 11:45:15,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:15,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843050562] [2019-12-18 11:45:15,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361470734] [2019-12-18 11:45:15,171 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:15,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:15,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:15,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:15,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:15,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:15,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:15,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697376091] [2019-12-18 11:45:15,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:15,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:15,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:15,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:15,353 INFO L87 Difference]: Start difference. First operand 134 states and 316 transitions. Second operand 18 states. [2019-12-18 11:45:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:16,000 INFO L93 Difference]: Finished difference Result 231 states and 496 transitions. [2019-12-18 11:45:16,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 11:45:16,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:16,001 INFO L225 Difference]: With dead ends: 231 [2019-12-18 11:45:16,001 INFO L226 Difference]: Without dead ends: 229 [2019-12-18 11:45:16,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 11:45:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-18 11:45:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 138. [2019-12-18 11:45:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 11:45:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 11:45:16,005 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 14 [2019-12-18 11:45:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:16,005 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 11:45:16,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 11:45:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:16,005 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:16,006 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:16,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:16,206 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033517, now seen corresponding path program 93 times [2019-12-18 11:45:16,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:16,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051364494] [2019-12-18 11:45:16,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:16,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051364494] [2019-12-18 11:45:16,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970667472] [2019-12-18 11:45:16,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:16,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:45:16,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:16,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:16,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:16,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:16,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:16,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977842534] [2019-12-18 11:45:16,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:16,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:16,496 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 18 states. [2019-12-18 11:45:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:17,147 INFO L93 Difference]: Finished difference Result 244 states and 536 transitions. [2019-12-18 11:45:17,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 11:45:17,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:17,148 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:45:17,148 INFO L226 Difference]: Without dead ends: 242 [2019-12-18 11:45:17,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 11:45:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-18 11:45:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 137. [2019-12-18 11:45:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 11:45:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-18 11:45:17,153 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 14 [2019-12-18 11:45:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:17,153 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-18 11:45:17,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-18 11:45:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:17,154 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:17,154 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:17,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:17,357 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:17,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036400, now seen corresponding path program 94 times [2019-12-18 11:45:17,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:17,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318522830] [2019-12-18 11:45:17,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:17,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318522830] [2019-12-18 11:45:17,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869301353] [2019-12-18 11:45:17,456 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:17,497 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:17,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:17,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:17,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:17,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:17,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:17,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87029445] [2019-12-18 11:45:17,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:17,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:17,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:17,682 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 18 states. [2019-12-18 11:45:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:18,359 INFO L93 Difference]: Finished difference Result 244 states and 536 transitions. [2019-12-18 11:45:18,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 11:45:18,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:18,361 INFO L225 Difference]: With dead ends: 244 [2019-12-18 11:45:18,361 INFO L226 Difference]: Without dead ends: 242 [2019-12-18 11:45:18,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 11:45:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-18 11:45:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 140. [2019-12-18 11:45:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 11:45:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 340 transitions. [2019-12-18 11:45:18,365 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 340 transitions. Word has length 14 [2019-12-18 11:45:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:18,365 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 340 transitions. [2019-12-18 11:45:18,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 340 transitions. [2019-12-18 11:45:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:18,366 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:18,366 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:18,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:18,566 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122797, now seen corresponding path program 95 times [2019-12-18 11:45:18,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:18,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620036211] [2019-12-18 11:45:18,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:18,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620036211] [2019-12-18 11:45:18,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033073448] [2019-12-18 11:45:18,665 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:18,710 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:18,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:18,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:18,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:18,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:18,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:18,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485605812] [2019-12-18 11:45:18,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:18,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:18,843 INFO L87 Difference]: Start difference. First operand 140 states and 340 transitions. Second operand 18 states. [2019-12-18 11:45:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:19,363 INFO L93 Difference]: Finished difference Result 243 states and 532 transitions. [2019-12-18 11:45:19,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 11:45:19,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:19,365 INFO L225 Difference]: With dead ends: 243 [2019-12-18 11:45:19,365 INFO L226 Difference]: Without dead ends: 241 [2019-12-18 11:45:19,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-18 11:45:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 142. [2019-12-18 11:45:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:45:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-18 11:45:19,369 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 14 [2019-12-18 11:45:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:19,369 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-18 11:45:19,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-18 11:45:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:19,369 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:19,369 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:19,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:19,570 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:19,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122890, now seen corresponding path program 96 times [2019-12-18 11:45:19,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:19,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199417345] [2019-12-18 11:45:19,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:19,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199417345] [2019-12-18 11:45:19,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688369578] [2019-12-18 11:45:19,671 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:19,720 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:45:19,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:19,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:19,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:19,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:19,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:19,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240822203] [2019-12-18 11:45:19,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:19,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:19,899 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 18 states. [2019-12-18 11:45:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:20,292 INFO L93 Difference]: Finished difference Result 233 states and 519 transitions. [2019-12-18 11:45:20,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:20,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:20,293 INFO L225 Difference]: With dead ends: 233 [2019-12-18 11:45:20,293 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 11:45:20,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:45:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 11:45:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2019-12-18 11:45:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:45:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 336 transitions. [2019-12-18 11:45:20,297 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 336 transitions. Word has length 14 [2019-12-18 11:45:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:20,297 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 336 transitions. [2019-12-18 11:45:20,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 336 transitions. [2019-12-18 11:45:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:20,297 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:20,297 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:20,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:20,498 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125680, now seen corresponding path program 97 times [2019-12-18 11:45:20,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:20,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089058685] [2019-12-18 11:45:20,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:20,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089058685] [2019-12-18 11:45:20,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201988762] [2019-12-18 11:45:20,604 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:20,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:20,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:20,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:20,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:20,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099280397] [2019-12-18 11:45:20,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:20,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:20,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:20,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:20,791 INFO L87 Difference]: Start difference. First operand 139 states and 336 transitions. Second operand 18 states. [2019-12-18 11:45:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:21,370 INFO L93 Difference]: Finished difference Result 241 states and 524 transitions. [2019-12-18 11:45:21,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 11:45:21,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:21,371 INFO L225 Difference]: With dead ends: 241 [2019-12-18 11:45:21,371 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 11:45:21,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 11:45:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 143. [2019-12-18 11:45:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:45:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2019-12-18 11:45:21,376 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 14 [2019-12-18 11:45:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:21,376 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2019-12-18 11:45:21,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2019-12-18 11:45:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:21,376 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:21,376 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:21,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:21,580 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:21,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1175804080, now seen corresponding path program 98 times [2019-12-18 11:45:21,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:21,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870525944] [2019-12-18 11:45:21,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:21,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870525944] [2019-12-18 11:45:21,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080361369] [2019-12-18 11:45:21,675 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:21,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:21,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:21,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:21,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:23,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:23,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:23,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229968254] [2019-12-18 11:45:23,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:23,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:23,009 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 18 states. [2019-12-18 11:45:23,738 WARN L192 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2019-12-18 11:45:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:24,908 INFO L93 Difference]: Finished difference Result 251 states and 561 transitions. [2019-12-18 11:45:24,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 11:45:24,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:24,910 INFO L225 Difference]: With dead ends: 251 [2019-12-18 11:45:24,910 INFO L226 Difference]: Without dead ends: 249 [2019-12-18 11:45:24,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=349, Invalid=840, Unknown=1, NotChecked=0, Total=1190 [2019-12-18 11:45:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-18 11:45:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2019-12-18 11:45:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:45:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2019-12-18 11:45:24,914 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 14 [2019-12-18 11:45:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:24,914 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2019-12-18 11:45:24,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2019-12-18 11:45:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:24,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:24,915 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:25,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:25,116 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896336, now seen corresponding path program 99 times [2019-12-18 11:45:25,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:25,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160393650] [2019-12-18 11:45:25,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:25,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160393650] [2019-12-18 11:45:25,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991708701] [2019-12-18 11:45:25,211 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:25,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 11:45:25,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:25,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:25,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:25,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:25,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:25,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133244830] [2019-12-18 11:45:25,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:25,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:25,384 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 18 states. [2019-12-18 11:45:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:25,903 INFO L93 Difference]: Finished difference Result 201 states and 442 transitions. [2019-12-18 11:45:25,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:25,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:25,905 INFO L225 Difference]: With dead ends: 201 [2019-12-18 11:45:25,905 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 11:45:25,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 11:45:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 11:45:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2019-12-18 11:45:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:45:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 345 transitions. [2019-12-18 11:45:25,908 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 345 transitions. Word has length 14 [2019-12-18 11:45:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:25,908 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 345 transitions. [2019-12-18 11:45:25,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 345 transitions. [2019-12-18 11:45:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:25,909 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:25,909 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:26,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:26,110 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:26,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:26,110 INFO L82 PathProgramCache]: Analyzing trace with hash 144146713, now seen corresponding path program 100 times [2019-12-18 11:45:26,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:26,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670661511] [2019-12-18 11:45:26,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:26,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670661511] [2019-12-18 11:45:26,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149426291] [2019-12-18 11:45:26,214 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:26,256 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:26,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:26,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:26,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:27,595 WARN L192 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 11:45:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:27,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:27,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:27,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463317827] [2019-12-18 11:45:27,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:27,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:27,597 INFO L87 Difference]: Start difference. First operand 142 states and 345 transitions. Second operand 18 states. [2019-12-18 11:45:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:28,142 INFO L93 Difference]: Finished difference Result 208 states and 454 transitions. [2019-12-18 11:45:28,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 11:45:28,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:28,143 INFO L225 Difference]: With dead ends: 208 [2019-12-18 11:45:28,144 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 11:45:28,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2019-12-18 11:45:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 11:45:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 11:45:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:45:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 341 transitions. [2019-12-18 11:45:28,147 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 341 transitions. Word has length 14 [2019-12-18 11:45:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:28,148 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 341 transitions. [2019-12-18 11:45:28,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 341 transitions. [2019-12-18 11:45:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:28,148 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:28,148 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:28,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:28,349 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 144146806, now seen corresponding path program 101 times [2019-12-18 11:45:28,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:28,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63519458] [2019-12-18 11:45:28,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:28,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63519458] [2019-12-18 11:45:28,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016236920] [2019-12-18 11:45:28,444 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:28,487 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:28,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:28,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:28,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:28,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:28,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:28,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548548515] [2019-12-18 11:45:28,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:28,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:28,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:28,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:28,640 INFO L87 Difference]: Start difference. First operand 141 states and 341 transitions. Second operand 18 states. [2019-12-18 11:45:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:29,152 INFO L93 Difference]: Finished difference Result 205 states and 448 transitions. [2019-12-18 11:45:29,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:29,153 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:29,154 INFO L225 Difference]: With dead ends: 205 [2019-12-18 11:45:29,154 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 11:45:29,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 11:45:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 142. [2019-12-18 11:45:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 11:45:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-18 11:45:29,158 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 14 [2019-12-18 11:45:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:29,158 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-18 11:45:29,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-18 11:45:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:29,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:29,159 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:29,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:29,360 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash 144233203, now seen corresponding path program 102 times [2019-12-18 11:45:29,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:29,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027395437] [2019-12-18 11:45:29,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:29,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027395437] [2019-12-18 11:45:29,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836918785] [2019-12-18 11:45:29,463 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:29,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:45:29,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:29,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:29,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:31,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:31,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:31,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841747274] [2019-12-18 11:45:31,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:31,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=228, Unknown=2, NotChecked=0, Total=306 [2019-12-18 11:45:31,760 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 18 states. [2019-12-18 11:45:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:32,930 INFO L93 Difference]: Finished difference Result 214 states and 466 transitions. [2019-12-18 11:45:32,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 11:45:32,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:32,931 INFO L225 Difference]: With dead ends: 214 [2019-12-18 11:45:32,932 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 11:45:32,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=320, Invalid=669, Unknown=3, NotChecked=0, Total=992 [2019-12-18 11:45:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 11:45:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 143. [2019-12-18 11:45:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 11:45:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2019-12-18 11:45:32,935 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 14 [2019-12-18 11:45:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:32,935 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2019-12-18 11:45:32,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2019-12-18 11:45:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:32,936 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:32,936 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:33,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:33,137 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 144233296, now seen corresponding path program 103 times [2019-12-18 11:45:33,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:33,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186802218] [2019-12-18 11:45:33,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:33,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186802218] [2019-12-18 11:45:33,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50081749] [2019-12-18 11:45:33,261 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:33,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:33,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:33,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:33,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:33,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850372249] [2019-12-18 11:45:33,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:33,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:33,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:33,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:33,525 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand 18 states. [2019-12-18 11:45:35,154 WARN L192 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 11:45:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:35,467 INFO L93 Difference]: Finished difference Result 227 states and 494 transitions. [2019-12-18 11:45:35,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:35,467 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:35,468 INFO L225 Difference]: With dead ends: 227 [2019-12-18 11:45:35,468 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 11:45:35,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-18 11:45:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 11:45:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 141. [2019-12-18 11:45:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:45:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-18 11:45:35,472 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 14 [2019-12-18 11:45:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:35,472 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-18 11:45:35,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-18 11:45:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:35,473 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:35,473 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:35,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:35,676 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 144236086, now seen corresponding path program 104 times [2019-12-18 11:45:35,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:35,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359704073] [2019-12-18 11:45:35,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:35,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359704073] [2019-12-18 11:45:35,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303024109] [2019-12-18 11:45:35,775 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:35,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:35,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:35,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:35,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:36,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:36,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:36,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520682926] [2019-12-18 11:45:36,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:36,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-18 11:45:36,557 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 18 states. [2019-12-18 11:45:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:37,166 INFO L93 Difference]: Finished difference Result 216 states and 465 transitions. [2019-12-18 11:45:37,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 11:45:37,167 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:37,168 INFO L225 Difference]: With dead ends: 216 [2019-12-18 11:45:37,168 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 11:45:37,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=678, Unknown=1, NotChecked=0, Total=992 [2019-12-18 11:45:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 11:45:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 141. [2019-12-18 11:45:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 11:45:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-18 11:45:37,172 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 14 [2019-12-18 11:45:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:37,172 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-18 11:45:37,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-18 11:45:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:37,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:37,173 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:37,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:37,373 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash 147006649, now seen corresponding path program 105 times [2019-12-18 11:45:37,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:37,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936485453] [2019-12-18 11:45:37,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:37,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936485453] [2019-12-18 11:45:37,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345871085] [2019-12-18 11:45:37,483 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:37,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:37,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:37,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:37,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:38,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:38,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:38,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061343295] [2019-12-18 11:45:38,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:38,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:38,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:38,882 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 18 states. [2019-12-18 11:45:39,936 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-18 11:45:42,082 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 11:45:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:42,129 INFO L93 Difference]: Finished difference Result 229 states and 497 transitions. [2019-12-18 11:45:42,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 11:45:42,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:42,131 INFO L225 Difference]: With dead ends: 229 [2019-12-18 11:45:42,131 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 11:45:42,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=353, Invalid=767, Unknown=2, NotChecked=0, Total=1122 [2019-12-18 11:45:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 11:45:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 139. [2019-12-18 11:45:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 11:45:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 330 transitions. [2019-12-18 11:45:42,135 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 330 transitions. Word has length 14 [2019-12-18 11:45:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:42,135 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 330 transitions. [2019-12-18 11:45:42,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 330 transitions. [2019-12-18 11:45:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:42,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:42,135 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:42,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:42,336 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 230123632, now seen corresponding path program 106 times [2019-12-18 11:45:42,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:42,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831638135] [2019-12-18 11:45:42,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:42,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831638135] [2019-12-18 11:45:42,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056468434] [2019-12-18 11:45:42,433 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:42,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:42,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:42,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:42,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:42,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:42,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:42,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746242034] [2019-12-18 11:45:42,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:42,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:42,764 INFO L87 Difference]: Start difference. First operand 139 states and 330 transitions. Second operand 18 states. [2019-12-18 11:45:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:44,571 INFO L93 Difference]: Finished difference Result 227 states and 485 transitions. [2019-12-18 11:45:44,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 11:45:44,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:44,573 INFO L225 Difference]: With dead ends: 227 [2019-12-18 11:45:44,573 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 11:45:44,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 11:45:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 11:45:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 136. [2019-12-18 11:45:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:45:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 318 transitions. [2019-12-18 11:45:44,576 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 318 transitions. Word has length 14 [2019-12-18 11:45:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:44,577 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 318 transitions. [2019-12-18 11:45:44,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 318 transitions. [2019-12-18 11:45:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:44,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:44,577 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:44,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:44,778 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1488309540, now seen corresponding path program 107 times [2019-12-18 11:45:44,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:44,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883319760] [2019-12-18 11:45:44,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:44,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883319760] [2019-12-18 11:45:44,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954601747] [2019-12-18 11:45:44,876 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:44,921 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:45:44,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:44,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:44,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:45,507 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_377 Int)) (and (<= c_~i~0 (+ v_~j~0_377 3)) (<= (div (+ (* v_~j~0_377 (- 1)) 2) (- 3)) 3) (<= c_~j~0 (+ c_~i~0 v_~j~0_377)))) is different from true [2019-12-18 11:45:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:45,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:45,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:45,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080755958] [2019-12-18 11:45:45,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:45,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:45,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-18 11:45:45,509 INFO L87 Difference]: Start difference. First operand 136 states and 318 transitions. Second operand 18 states. [2019-12-18 11:45:46,693 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-12-18 11:45:47,356 WARN L192 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2019-12-18 11:45:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:48,518 INFO L93 Difference]: Finished difference Result 219 states and 466 transitions. [2019-12-18 11:45:48,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 11:45:48,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:48,519 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:45:48,519 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 11:45:48,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=424, Invalid=983, Unknown=3, NotChecked=72, Total=1482 [2019-12-18 11:45:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 11:45:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 135. [2019-12-18 11:45:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:45:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2019-12-18 11:45:48,524 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 14 [2019-12-18 11:45:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:48,524 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2019-12-18 11:45:48,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2019-12-18 11:45:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:48,524 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:48,524 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:48,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:48,725 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1485541860, now seen corresponding path program 108 times [2019-12-18 11:45:48,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:48,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469708242] [2019-12-18 11:45:48,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:48,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469708242] [2019-12-18 11:45:48,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473525627] [2019-12-18 11:45:48,817 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:48,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 11:45:48,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:48,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:48,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:48,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:48,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:48,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245038236] [2019-12-18 11:45:48,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:48,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:48,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:48,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:48,991 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand 18 states. [2019-12-18 11:45:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:49,521 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2019-12-18 11:45:49,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 11:45:49,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:49,523 INFO L225 Difference]: With dead ends: 223 [2019-12-18 11:45:49,523 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:45:49,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 11:45:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:45:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 136. [2019-12-18 11:45:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 11:45:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 318 transitions. [2019-12-18 11:45:49,527 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 318 transitions. Word has length 14 [2019-12-18 11:45:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:49,527 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 318 transitions. [2019-12-18 11:45:49,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 318 transitions. [2019-12-18 11:45:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:49,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:49,527 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:49,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:49,728 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1485541767, now seen corresponding path program 109 times [2019-12-18 11:45:49,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:49,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452773437] [2019-12-18 11:45:49,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:49,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452773437] [2019-12-18 11:45:49,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358226387] [2019-12-18 11:45:49,830 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:49,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:49,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:50,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:50,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:50,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552563991] [2019-12-18 11:45:50,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:50,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:50,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:50,014 INFO L87 Difference]: Start difference. First operand 136 states and 318 transitions. Second operand 18 states. [2019-12-18 11:45:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:50,598 INFO L93 Difference]: Finished difference Result 222 states and 474 transitions. [2019-12-18 11:45:50,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 11:45:50,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:50,599 INFO L225 Difference]: With dead ends: 222 [2019-12-18 11:45:50,599 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:45:50,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:45:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 135. [2019-12-18 11:45:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:45:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2019-12-18 11:45:50,603 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 14 [2019-12-18 11:45:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:50,603 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2019-12-18 11:45:50,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2019-12-18 11:45:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:50,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:50,604 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:50,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:50,806 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1485538977, now seen corresponding path program 110 times [2019-12-18 11:45:50,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:50,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784183157] [2019-12-18 11:45:50,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:50,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784183157] [2019-12-18 11:45:50,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527086084] [2019-12-18 11:45:50,901 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:50,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:45:50,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:50,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:50,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:51,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:51,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:51,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178139542] [2019-12-18 11:45:51,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:51,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:51,115 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand 18 states. [2019-12-18 11:45:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:51,682 INFO L93 Difference]: Finished difference Result 219 states and 466 transitions. [2019-12-18 11:45:51,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 11:45:51,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:51,684 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:45:51,684 INFO L226 Difference]: Without dead ends: 217 [2019-12-18 11:45:51,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-18 11:45:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-18 11:45:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 134. [2019-12-18 11:45:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:45:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 310 transitions. [2019-12-18 11:45:51,688 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 310 transitions. Word has length 14 [2019-12-18 11:45:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:51,689 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 310 transitions. [2019-12-18 11:45:51,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 310 transitions. [2019-12-18 11:45:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:51,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:51,690 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:51,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:51,894 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1485538884, now seen corresponding path program 111 times [2019-12-18 11:45:51,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:51,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537078413] [2019-12-18 11:45:51,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:52,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537078413] [2019-12-18 11:45:52,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205957517] [2019-12-18 11:45:52,049 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:52,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:45:52,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:52,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:52,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:52,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:52,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:52,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716948216] [2019-12-18 11:45:52,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:52,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:52,262 INFO L87 Difference]: Start difference. First operand 134 states and 310 transitions. Second operand 18 states. [2019-12-18 11:45:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:52,789 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2019-12-18 11:45:52,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 11:45:52,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:52,790 INFO L225 Difference]: With dead ends: 223 [2019-12-18 11:45:52,790 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 11:45:52,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 11:45:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 11:45:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 134. [2019-12-18 11:45:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 11:45:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 310 transitions. [2019-12-18 11:45:52,794 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 310 transitions. Word has length 14 [2019-12-18 11:45:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:52,795 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 310 transitions. [2019-12-18 11:45:52,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 310 transitions. [2019-12-18 11:45:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:52,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:52,796 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:52,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:52,998 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1485452487, now seen corresponding path program 112 times [2019-12-18 11:45:53,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:53,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144779154] [2019-12-18 11:45:53,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:53,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144779154] [2019-12-18 11:45:53,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818171034] [2019-12-18 11:45:53,100 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:53,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:45:53,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:53,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:53,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:53,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:53,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:53,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866737685] [2019-12-18 11:45:53,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:53,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:53,291 INFO L87 Difference]: Start difference. First operand 134 states and 310 transitions. Second operand 18 states. [2019-12-18 11:45:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:45:53,981 INFO L93 Difference]: Finished difference Result 219 states and 463 transitions. [2019-12-18 11:45:53,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 11:45:53,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 11:45:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:45:53,982 INFO L225 Difference]: With dead ends: 219 [2019-12-18 11:45:53,983 INFO L226 Difference]: Without dead ends: 217 [2019-12-18 11:45:53,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 11:45:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-18 11:45:53,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 135. [2019-12-18 11:45:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 11:45:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2019-12-18 11:45:53,987 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 14 [2019-12-18 11:45:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:45:53,987 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2019-12-18 11:45:53,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 11:45:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2019-12-18 11:45:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:45:53,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:45:53,988 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:45:54,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:54,190 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:45:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:45:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1485452394, now seen corresponding path program 113 times [2019-12-18 11:45:54,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:45:54,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865507623] [2019-12-18 11:45:54,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:45:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:45:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:54,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865507623] [2019-12-18 11:45:54,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676108859] [2019-12-18 11:45:54,291 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:54,331 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 11:45:54,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:45:54,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:45:54,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:45:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:45:54,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:45:54,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 11:45:54,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436007478] [2019-12-18 11:45:54,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 11:45:54,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:45:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 11:45:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:45:54,519 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand 18 states. Received shutdown request... [2019-12-18 11:45:55,571 WARN L209 SmtUtils]: Removed 5 from assertion stack [2019-12-18 11:45:55,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 11:45:55,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:45:55,772 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 11:45:55,781 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 11:45:55,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:45:55 BasicIcfg [2019-12-18 11:45:55,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:45:55,783 INFO L168 Benchmark]: Toolchain (without parser) took 284920.64 ms. Allocated memory was 148.4 MB in the beginning and 193.5 MB in the end (delta: 45.1 MB). Free memory was 103.3 MB in the beginning and 112.4 MB in the end (delta: -9.0 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:55,783 INFO L168 Benchmark]: CDTParser took 1.55 ms. Allocated memory is still 148.4 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:45:55,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.11 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 103.3 MB in the beginning and 164.4 MB in the end (delta: -61.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:55,784 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.69 ms. Allocated memory is still 205.0 MB. Free memory was 164.4 MB in the beginning and 161.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:55,784 INFO L168 Benchmark]: Boogie Preprocessor took 41.27 ms. Allocated memory is still 205.0 MB. Free memory was 161.7 MB in the beginning and 160.8 MB in the end (delta: 897.7 kB). Peak memory consumption was 897.7 kB. Max. memory is 7.1 GB. [2019-12-18 11:45:55,785 INFO L168 Benchmark]: RCFGBuilder took 421.32 ms. Allocated memory is still 205.0 MB. Free memory was 160.8 MB in the beginning and 140.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:55,785 INFO L168 Benchmark]: TraceAbstraction took 283736.20 ms. Allocated memory was 205.0 MB in the beginning and 193.5 MB in the end (delta: -11.5 MB). Free memory was 140.7 MB in the beginning and 112.4 MB in the end (delta: 28.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2019-12-18 11:45:55,788 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.55 ms. Allocated memory is still 148.4 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.11 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 103.3 MB in the beginning and 164.4 MB in the end (delta: -61.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.69 ms. Allocated memory is still 205.0 MB. Free memory was 164.4 MB in the beginning and 161.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.27 ms. Allocated memory is still 205.0 MB. Free memory was 161.7 MB in the beginning and 160.8 MB in the end (delta: 897.7 kB). Peak memory consumption was 897.7 kB. Max. memory is 7.1 GB. * RCFGBuilder took 421.32 ms. Allocated memory is still 205.0 MB. Free memory was 160.8 MB in the beginning and 140.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283736.20 ms. Allocated memory was 205.0 MB in the beginning and 193.5 MB in the end (delta: -11.5 MB). Free memory was 140.7 MB in the beginning and 112.4 MB in the end (delta: 28.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 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 (135states) and FLOYD_HOARE automaton (currently 16 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 14ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.6s, OverallIterations: 129, TraceHistogramMax: 8, AutomataDifference: 158.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1160 SDtfs, 24492 SDslu, 12205 SDs, 0 SdLazy, 6960 SolverSat, 4310 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 35.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3841 GetRequests, 608 SyntacticMatches, 16 SemanticMatches, 3216 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 19292 ImplicationChecksByTransitivity, 207.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 128 MinimizatonAttempts, 7009 StatesRemovedByMinimization, 127 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 90.6s InterpolantComputationTime, 3231 NumberOfCodeBlocks, 3231 NumberOfCodeBlocksAsserted, 420 NumberOfCheckSat, 2978 ConstructedInterpolants, 117 QuantifiedInterpolants, 454486 SizeOfPredicates, 0 NumberOfNonLiveVariables, 11568 ConjunctsInSsa, 1362 ConjunctsInUnsatCore, 253 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2034 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